The document summarizes a study that investigated how different levels of light affect the rate of seed germination in radishes. Seeds were exposed to three lighting conditions (maximum, partial, and zero sunlight) in petri dishes maintained at 25°C. The results showed that seeds germinated equally in darkness and maximum sunlight, falsifying the hypothesis that more light increases germination rate. The study aimed to determine optimal lighting for radish growth in gardens.
This document discusses an experiment comparing the growth parameters of six mungbean varieties under subtropical conditions. The results showed that most dry mass production occurred after flowering. Maximum crop growth rate was observed during the pod filling stage due to increased leaf area. Higher total dry mass production and crop growth rate at all stages, as well as higher relative growth rate and net assimilation rate in the vegetative stage, contributed to greater yield. For higher yields, mungbean varieties should possess these growth characteristics.
The complete guide to learning how to hydroponics. Grow your very own vegetables, plants, and flowers indoors year round without the back breaking work of gardening. For more information visit http://www.zerosoilgardens.com
Cloning is the asexual reproduction of plants through vegetative propagation techniques like taking cuttings, division, or grafting. This allows the production of exact genetic copies of plants. When taking cuttings for cloning, a portion of the plant with stem and leaves is placed in a sterile medium and grown into a new plant. Clones have advantages like allowing reproduction of superior cultivars, disease resistance, and overcoming issues with seeds like low germination rates or long juvenile periods before flowering.
Farmers worry about declining crop yields during drought conditions. There are several alternative ways for farmers to overcome this:
1. Plant drought-tolerant crops like cacti and succulents that require less water.
2. Build reservoirs and improve irrigation systems to ensure a steady water supply for crops.
3. Construct greenhouses to better control the temperature and humidity around plants. This allows for plant growth in areas that may otherwise be unsuitable.
4. Explore new areas suitable for agriculture that have reliable access to water if the existing farmland is affected by drought.
The document discusses several topics related to agriculture and pest control:
1) It describes different types of insecticides, herbicides, and fungicides used for various pests, as well as some of their risks. Endosulfan and glyphosate are mentioned as examples.
2) It provides a recipe for a homemade insecticide made from water, cigar snuff, and soap that can be stored and used over several months.
3) It discusses the development of pesticide production plants and how they aim to produce methamidophos and other pesticides at lower costs than imported versions.
Hydroponics is a method of growing plants without soil, instead using mineral nutrient solutions in water or an inert medium. The roots of plants are placed in the nutrient solution to absorb nutrients. Key benefits include higher yields, more control over nutrient levels, less water and space needed compared to traditional farming. Hydroponic farming provides a precise scientific approach to produce high quality, nutritious food in any climate and can help address issues of food and water shortages globally.
The document discusses a student project to grow plants using a hydroponic method without soil. It describes traditional plant growing which requires soil, nutrients, water, and sunlight. Hydroponics uses a nutrient solution in water instead of soil. The student project aims to study plant growth using hydroponics and relate it to biology topics like nutrient cycles, photosynthesis, cell processes, genetics, and evolution. The students designed nutrient solutions, collected data on plant growth, and analyzed results to determine if hydroponics is a viable solution for plant cultivation.
This document discusses an experiment comparing the growth parameters of six mungbean varieties under subtropical conditions. The results showed that most dry mass production occurred after flowering. Maximum crop growth rate was observed during the pod filling stage due to increased leaf area. Higher total dry mass production and crop growth rate at all stages, as well as higher relative growth rate and net assimilation rate in the vegetative stage, contributed to greater yield. For higher yields, mungbean varieties should possess these growth characteristics.
The complete guide to learning how to hydroponics. Grow your very own vegetables, plants, and flowers indoors year round without the back breaking work of gardening. For more information visit http://www.zerosoilgardens.com
Cloning is the asexual reproduction of plants through vegetative propagation techniques like taking cuttings, division, or grafting. This allows the production of exact genetic copies of plants. When taking cuttings for cloning, a portion of the plant with stem and leaves is placed in a sterile medium and grown into a new plant. Clones have advantages like allowing reproduction of superior cultivars, disease resistance, and overcoming issues with seeds like low germination rates or long juvenile periods before flowering.
Farmers worry about declining crop yields during drought conditions. There are several alternative ways for farmers to overcome this:
1. Plant drought-tolerant crops like cacti and succulents that require less water.
2. Build reservoirs and improve irrigation systems to ensure a steady water supply for crops.
3. Construct greenhouses to better control the temperature and humidity around plants. This allows for plant growth in areas that may otherwise be unsuitable.
4. Explore new areas suitable for agriculture that have reliable access to water if the existing farmland is affected by drought.
The document discusses several topics related to agriculture and pest control:
1) It describes different types of insecticides, herbicides, and fungicides used for various pests, as well as some of their risks. Endosulfan and glyphosate are mentioned as examples.
2) It provides a recipe for a homemade insecticide made from water, cigar snuff, and soap that can be stored and used over several months.
3) It discusses the development of pesticide production plants and how they aim to produce methamidophos and other pesticides at lower costs than imported versions.
Hydroponics is a method of growing plants without soil, instead using mineral nutrient solutions in water or an inert medium. The roots of plants are placed in the nutrient solution to absorb nutrients. Key benefits include higher yields, more control over nutrient levels, less water and space needed compared to traditional farming. Hydroponic farming provides a precise scientific approach to produce high quality, nutritious food in any climate and can help address issues of food and water shortages globally.
The document discusses a student project to grow plants using a hydroponic method without soil. It describes traditional plant growing which requires soil, nutrients, water, and sunlight. Hydroponics uses a nutrient solution in water instead of soil. The student project aims to study plant growth using hydroponics and relate it to biology topics like nutrient cycles, photosynthesis, cell processes, genetics, and evolution. The students designed nutrient solutions, collected data on plant growth, and analyzed results to determine if hydroponics is a viable solution for plant cultivation.
ELEMENTS TO BE OBSERVED IN PLANTING TREES, FRUIT-BEARING TREES.pdfChristyJoiFalcasanto
Proper planting requires systematic steps including soil preparation, seedling selection, and tool and location selection. Planting methods include direct and indirect, with direct planting sowing seeds directly in the soil and indirect first growing seedlings for transplanting. Key steps in planting include choosing the best location and season, fertilizing the soil, and regular care of soil and plants. Seed germination begins with water absorption and triggers root growth for water, requiring moisture, warmth, oxygen and sometimes sunlight. Seedlings are thinned, pricked, and hardened before transplanting through decreasing water and increasing sun exposure to strengthen them.
The document discusses challenges for future gardening including limited space for travel and unknown soils on other planets. It examines using hydroponics to grow crops with high yields over long periods. An experiment is described that uses hydroponics to grow Zea mays (corn) under different light and nutrient solutions to determine best growth conditions. Groups received full or potassium-deficient nutrients and natural or plant light. The group with full nutrients and plant light grew tallest, rejecting the hypothesis.
This document summarizes an experiment conducted by Sandra Cash and Hannah Peterson to compare plant growth using hydroponics versus soil. They hypothesized that plants would grow better with hydroponics as it allows for more control of nutrient levels. They grew purple daisies for two months, with half in soil and half in a hydroponics kit. The results were inconclusive, as half of both the hydroponics and soil plants died. The surviving hydroponics plants grew slower than the soil plants. More research is needed to make a clear conclusion.
There are some areas of the world in which the agricultural crops require assistance and cooling, especially
during hot days, in order
to prevent them from being subjected to unnecessary stress. In other areas, the color of fruit can be improved by cooling the trees
during the correct time period.
It is possible to extend the shelf life of some types of fruit by cooling them while they are still on the trees. And by using correct and
supervised cooling, we can increase the flower fruit set during periods of very hot weather. In other regions, we can aid and improve
the yield of fruit crops by cooling during the autumn and winter months, and then adding cold units to the same trees or cooling the
same crops at the end of the winter months in order to cause early blossoming.
In addition to employing cooling in open fields, an additional—perhaps primary—use of cooling is in various
types of greenhouses.
The principle of a greenhouse
is that the farmer can control its internal climate and thereby provide the plants with optimal growth
conditions. Therefore, a system that will have a cooling
effect on the internal temperature on hot days is almost indispensable for
every greenhouse.
Another use of a cooling system inside a greenhouse
is, perhaps surprisingly, in cold countries where the greenhouse is especially
built with few ventilation
openings to conserve internal heat. As a result of this design, on the few days that are very hot, there is
insufficient air flow to cool the interior. An efficient cooling system can solve the problem. Further, in these same cold countries, the
crops are usually
already inside the greenhouse by the first days of spring, but the heating system still needs to be operated
in order
to ensure the correct conditions. The windows must not be opened, and inside the building,
the relative humidity drops beneath the
desired levels. At this time, operating a suitable cooling system improves these crops.
What is possible to do to improve agricultural crops is also possible to do with livestock, including all types of poultry, cows, and pigs.
A suitable system can cool their micro-environment and improve production.
The different methods of cooling based on sprinkler-spraying products are as follows
The document discusses nocturnal plants that bloom at night and their adaptations for blooming in low light or darkness. It describes how plant volatiles can affect caterpillar behavior and allow them to sense their environment. Nocturnal plants still require proper growing conditions like sunlight during the day to build energy for blooms at night. An experiment showed that a plant receiving sunlight grew healthily while one in darkness became limp and unhealthy without the ability to photosynthesize.
Post-Harvest Handling of Seed Collections
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
This document provides guidance on proper post-harvest handling of seed collections to maximize seed viability. It addresses issues like separating immature and mature seeds, assessing seed dryness, and handling based on ambient conditions. The key recommendations are to dry seeds as soon as possible if moisture levels are above 50% equilibrium relative humidity, using methods like spreading in shade or using desiccants. Very immature seeds that are not desiccation tolerant require slow drying under natural conditions to allow further ripening. Proper post-harvest handling is important to avoid losses in viability during collecting trips and ensure high quality seeds arrive at seed banks.
This document provides instructions for home germination testing of seeds using common household items. Seeds are placed on moistened paper towels in plastic bags and kept in conditions suitable for the type of seed, like warm or cool temperatures. The number of seeds that sprout are counted and used to calculate the germination percentage, informing gardeners if seeds are viable for planting or need to be replaced. Special considerations are given for seeds that may have hard coats requiring scarification. Regular testing helps assess seed vigor over time for storing and planning future gardens.
Home Germination Testing
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
Seed germination begins when a seed absorbs water and swells. Enzymes are activated which break down stored food to provide energy for growth. The radicle emerges first, followed by the plumule. Germination requires favorable conditions like water, oxygen, temperature and sometimes light. There are two types of germination - epigeal where the seed leaves emerge above ground and hypogeal where they remain underground. Factors like water, temperature, light, soil conditions and the seed's maturity and dormancy affect whether and how quickly it will germinate.
Basic seed sowing for the home gardener--
Having the right tools collected can take the mystery out of seed starting--
Joann Darling is adjunct faculty at Vermont Center for Intergrative Herbalism and program coordinator for Good Food Food Medicine teaching adults and children how to grow their own food and herbal remedies.
Dormancy is when there is a lack of germination in seeds or tubers even though the required conditions (temperature, humidity, oxygen, and light) are provided. Dormancy is based on hard seed coat impermeability or the lack of supply and activity of enzymes (internal dormancy) necessary for germination. Dormancy is an important factor limiting production in many field crops. Several physical and chemical pretreatments are applied to the organic material (seeds/tubers) to overcome dormancy. Physical and physiological dormancy can be found together in some plants, and this makes it difficult to provide high-frequency, healthy seedling growth, since the formation of healthy seedlings from the organic material (seeds/tubers) sown is a prerequisite for plant production. This chapter will focus on the description of four different methods we have not seen reported elsewhere for overcoming dormancy.
Dormancy is a state where seeds lack germination even when conditions are suitable. It is caused by impermeable seed coats or lack of enzymes for germination. This chapter discusses four new methods for overcoming dormancy: exposing seeds to magnetic fields, treating with squirting cucumber fruit juice, sodium hypochlorite solutions, and gamma radiation. Fruit trees must be propagated vegetatively by grafting or budding as seeds will produce hybrids unlike the parent fruit. Seeds require chilling periods before germination and there are several methods described for growing fruit trees from seed.
Plant cloning has several benefits including producing more plants, having plants that are stronger and require less resources to grow. The process of cloning plants involves taking a cutting from a parent plant and stimulating it to grow roots and develop into a new plant. While cloning increases the supply of plants and their quality, it can reduce genetic diversity and make entire crops vulnerable if a disease affects the cloned plants. There is ongoing discussion around the environmental and other impacts of widespread plant cloning.
Growing out of season vegetable crops, in hot weather and cold weather. Growing vegetables to store for out-of-season use. Techniques to success in all seasons: germinating seeds, growing plants, protecting crops from hot weather, pests, cold weather. Choosing suitable crops that will work for your farm or garden.
Cultivation and collection of drugs of natural originSiddhartha Das
This document discusses methods of propagating and collecting drugs from natural sources. It describes vegetative propagation (cutting, layering, grafting), sexual propagation (pollination, fertilization, seedling dormancy), and micropropagation. Vegetative propagation replicates plants genetically while sexual propagation introduces variation. Advantages and disadvantages of each method are provided. The document also outlines best practices for collecting medicinal plants at their peak quality and processing and storing the materials.
The document provides a revision guide for the CXC Biology exam covering several topics:
1. Growth in plants versus animals, focusing on plant growth occurring in meristematic tissues only.
2. Germination, outlining the key conditions and multi-step process, from water absorption to seed coat rupture and seedling emergence.
3. Nutrition types, differentiating between autotrophic and heterotrophic nutrition and defining nutrients as chemical substances providing nourishment.
It also provides details on photosynthesis, including the word equation, role of products, stages (light and dark), leaf adaptations and structures, and limiting factors. Testing methods for photosynthesis and the presence of its products (starch and oxygen)
1. The document describes the parts of a dicot seed and the process of germination. It identifies the seed coat, cotyledons, hypocotyl, and radicle as the main parts of the seed.
2. During germination, the radicle emerges from the seed as the primary root while the hypocotyl and cotyledons remain inside the seed coat. The cotyledons provide nutrition to fuel the early growth of the seedling.
3. For germination to occur, the seed needs water to activate enzymes and respiration, warmth for enzymatic reactions, and oxygen for cellular respiration during the growth of the embryonic plant.
Economization of Datura Plant Using Planttissue Cultureiosrjce
IOSR Journal of Pharmacy and Biological Sciences(IOSR-JPBS) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of Pharmacy and Biological Science. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Pharmacy and Biological Science. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
ELEMENTS TO BE OBSERVED IN PLANTING TREES, FRUIT-BEARING TREES.pdfChristyJoiFalcasanto
Proper planting requires systematic steps including soil preparation, seedling selection, and tool and location selection. Planting methods include direct and indirect, with direct planting sowing seeds directly in the soil and indirect first growing seedlings for transplanting. Key steps in planting include choosing the best location and season, fertilizing the soil, and regular care of soil and plants. Seed germination begins with water absorption and triggers root growth for water, requiring moisture, warmth, oxygen and sometimes sunlight. Seedlings are thinned, pricked, and hardened before transplanting through decreasing water and increasing sun exposure to strengthen them.
The document discusses challenges for future gardening including limited space for travel and unknown soils on other planets. It examines using hydroponics to grow crops with high yields over long periods. An experiment is described that uses hydroponics to grow Zea mays (corn) under different light and nutrient solutions to determine best growth conditions. Groups received full or potassium-deficient nutrients and natural or plant light. The group with full nutrients and plant light grew tallest, rejecting the hypothesis.
This document summarizes an experiment conducted by Sandra Cash and Hannah Peterson to compare plant growth using hydroponics versus soil. They hypothesized that plants would grow better with hydroponics as it allows for more control of nutrient levels. They grew purple daisies for two months, with half in soil and half in a hydroponics kit. The results were inconclusive, as half of both the hydroponics and soil plants died. The surviving hydroponics plants grew slower than the soil plants. More research is needed to make a clear conclusion.
There are some areas of the world in which the agricultural crops require assistance and cooling, especially
during hot days, in order
to prevent them from being subjected to unnecessary stress. In other areas, the color of fruit can be improved by cooling the trees
during the correct time period.
It is possible to extend the shelf life of some types of fruit by cooling them while they are still on the trees. And by using correct and
supervised cooling, we can increase the flower fruit set during periods of very hot weather. In other regions, we can aid and improve
the yield of fruit crops by cooling during the autumn and winter months, and then adding cold units to the same trees or cooling the
same crops at the end of the winter months in order to cause early blossoming.
In addition to employing cooling in open fields, an additional—perhaps primary—use of cooling is in various
types of greenhouses.
The principle of a greenhouse
is that the farmer can control its internal climate and thereby provide the plants with optimal growth
conditions. Therefore, a system that will have a cooling
effect on the internal temperature on hot days is almost indispensable for
every greenhouse.
Another use of a cooling system inside a greenhouse
is, perhaps surprisingly, in cold countries where the greenhouse is especially
built with few ventilation
openings to conserve internal heat. As a result of this design, on the few days that are very hot, there is
insufficient air flow to cool the interior. An efficient cooling system can solve the problem. Further, in these same cold countries, the
crops are usually
already inside the greenhouse by the first days of spring, but the heating system still needs to be operated
in order
to ensure the correct conditions. The windows must not be opened, and inside the building,
the relative humidity drops beneath the
desired levels. At this time, operating a suitable cooling system improves these crops.
What is possible to do to improve agricultural crops is also possible to do with livestock, including all types of poultry, cows, and pigs.
A suitable system can cool their micro-environment and improve production.
The different methods of cooling based on sprinkler-spraying products are as follows
The document discusses nocturnal plants that bloom at night and their adaptations for blooming in low light or darkness. It describes how plant volatiles can affect caterpillar behavior and allow them to sense their environment. Nocturnal plants still require proper growing conditions like sunlight during the day to build energy for blooms at night. An experiment showed that a plant receiving sunlight grew healthily while one in darkness became limp and unhealthy without the ability to photosynthesize.
Post-Harvest Handling of Seed Collections
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
This document provides guidance on proper post-harvest handling of seed collections to maximize seed viability. It addresses issues like separating immature and mature seeds, assessing seed dryness, and handling based on ambient conditions. The key recommendations are to dry seeds as soon as possible if moisture levels are above 50% equilibrium relative humidity, using methods like spreading in shade or using desiccants. Very immature seeds that are not desiccation tolerant require slow drying under natural conditions to allow further ripening. Proper post-harvest handling is important to avoid losses in viability during collecting trips and ensure high quality seeds arrive at seed banks.
This document provides instructions for home germination testing of seeds using common household items. Seeds are placed on moistened paper towels in plastic bags and kept in conditions suitable for the type of seed, like warm or cool temperatures. The number of seeds that sprout are counted and used to calculate the germination percentage, informing gardeners if seeds are viable for planting or need to be replaced. Special considerations are given for seeds that may have hard coats requiring scarification. Regular testing helps assess seed vigor over time for storing and planning future gardens.
Home Germination Testing
`
For more information, Please see websites below:
`
Organic Edible Schoolyards & Gardening with Children =
http://scribd.com/doc/239851214 ~
`
Double Food Production from your School Garden with Organic Tech =
http://scribd.com/doc/239851079 ~
`
Free School Gardening Art Posters =
http://scribd.com/doc/239851159 ~
`
Increase Food Production with Companion Planting in your School Garden =
http://scribd.com/doc/239851159 ~
`
Healthy Foods Dramatically Improves Student Academic Success =
http://scribd.com/doc/239851348 ~
`
City Chickens for your Organic School Garden =
http://scribd.com/doc/239850440 ~
`
Simple Square Foot Gardening for Schools - Teacher Guide =
http://scribd.com/doc/239851110 ~
Seed germination begins when a seed absorbs water and swells. Enzymes are activated which break down stored food to provide energy for growth. The radicle emerges first, followed by the plumule. Germination requires favorable conditions like water, oxygen, temperature and sometimes light. There are two types of germination - epigeal where the seed leaves emerge above ground and hypogeal where they remain underground. Factors like water, temperature, light, soil conditions and the seed's maturity and dormancy affect whether and how quickly it will germinate.
Basic seed sowing for the home gardener--
Having the right tools collected can take the mystery out of seed starting--
Joann Darling is adjunct faculty at Vermont Center for Intergrative Herbalism and program coordinator for Good Food Food Medicine teaching adults and children how to grow their own food and herbal remedies.
Dormancy is when there is a lack of germination in seeds or tubers even though the required conditions (temperature, humidity, oxygen, and light) are provided. Dormancy is based on hard seed coat impermeability or the lack of supply and activity of enzymes (internal dormancy) necessary for germination. Dormancy is an important factor limiting production in many field crops. Several physical and chemical pretreatments are applied to the organic material (seeds/tubers) to overcome dormancy. Physical and physiological dormancy can be found together in some plants, and this makes it difficult to provide high-frequency, healthy seedling growth, since the formation of healthy seedlings from the organic material (seeds/tubers) sown is a prerequisite for plant production. This chapter will focus on the description of four different methods we have not seen reported elsewhere for overcoming dormancy.
Dormancy is a state where seeds lack germination even when conditions are suitable. It is caused by impermeable seed coats or lack of enzymes for germination. This chapter discusses four new methods for overcoming dormancy: exposing seeds to magnetic fields, treating with squirting cucumber fruit juice, sodium hypochlorite solutions, and gamma radiation. Fruit trees must be propagated vegetatively by grafting or budding as seeds will produce hybrids unlike the parent fruit. Seeds require chilling periods before germination and there are several methods described for growing fruit trees from seed.
Plant cloning has several benefits including producing more plants, having plants that are stronger and require less resources to grow. The process of cloning plants involves taking a cutting from a parent plant and stimulating it to grow roots and develop into a new plant. While cloning increases the supply of plants and their quality, it can reduce genetic diversity and make entire crops vulnerable if a disease affects the cloned plants. There is ongoing discussion around the environmental and other impacts of widespread plant cloning.
Growing out of season vegetable crops, in hot weather and cold weather. Growing vegetables to store for out-of-season use. Techniques to success in all seasons: germinating seeds, growing plants, protecting crops from hot weather, pests, cold weather. Choosing suitable crops that will work for your farm or garden.
Cultivation and collection of drugs of natural originSiddhartha Das
This document discusses methods of propagating and collecting drugs from natural sources. It describes vegetative propagation (cutting, layering, grafting), sexual propagation (pollination, fertilization, seedling dormancy), and micropropagation. Vegetative propagation replicates plants genetically while sexual propagation introduces variation. Advantages and disadvantages of each method are provided. The document also outlines best practices for collecting medicinal plants at their peak quality and processing and storing the materials.
The document provides a revision guide for the CXC Biology exam covering several topics:
1. Growth in plants versus animals, focusing on plant growth occurring in meristematic tissues only.
2. Germination, outlining the key conditions and multi-step process, from water absorption to seed coat rupture and seedling emergence.
3. Nutrition types, differentiating between autotrophic and heterotrophic nutrition and defining nutrients as chemical substances providing nourishment.
It also provides details on photosynthesis, including the word equation, role of products, stages (light and dark), leaf adaptations and structures, and limiting factors. Testing methods for photosynthesis and the presence of its products (starch and oxygen)
1. The document describes the parts of a dicot seed and the process of germination. It identifies the seed coat, cotyledons, hypocotyl, and radicle as the main parts of the seed.
2. During germination, the radicle emerges from the seed as the primary root while the hypocotyl and cotyledons remain inside the seed coat. The cotyledons provide nutrition to fuel the early growth of the seedling.
3. For germination to occur, the seed needs water to activate enzymes and respiration, warmth for enzymatic reactions, and oxygen for cellular respiration during the growth of the embryonic plant.
Economization of Datura Plant Using Planttissue Cultureiosrjce
IOSR Journal of Pharmacy and Biological Sciences(IOSR-JPBS) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of Pharmacy and Biological Science. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Pharmacy and Biological Science. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Gender and Mental Health - Counselling and Family Therapy Applications and In...PsychoTech Services
A proprietary approach developed by bringing together the best of learning theories from Psychology, design principles from the world of visualization, and pedagogical methods from over a decade of training experience, that enables you to: Learn better, faster!
Beyond Degrees - Empowering the Workforce in the Context of Skills-First.pptxEduSkills OECD
Iván Bornacelly, Policy Analyst at the OECD Centre for Skills, OECD, presents at the webinar 'Tackling job market gaps with a skills-first approach' on 12 June 2024
Elevate Your Nonprofit's Online Presence_ A Guide to Effective SEO Strategies...TechSoup
Whether you're new to SEO or looking to refine your existing strategies, this webinar will provide you with actionable insights and practical tips to elevate your nonprofit's online presence.
THE SACRIFICE HOW PRO-PALESTINE PROTESTS STUDENTS ARE SACRIFICING TO CHANGE T...indexPub
The recent surge in pro-Palestine student activism has prompted significant responses from universities, ranging from negotiations and divestment commitments to increased transparency about investments in companies supporting the war on Gaza. This activism has led to the cessation of student encampments but also highlighted the substantial sacrifices made by students, including academic disruptions and personal risks. The primary drivers of these protests are poor university administration, lack of transparency, and inadequate communication between officials and students. This study examines the profound emotional, psychological, and professional impacts on students engaged in pro-Palestine protests, focusing on Generation Z's (Gen-Z) activism dynamics. This paper explores the significant sacrifices made by these students and even the professors supporting the pro-Palestine movement, with a focus on recent global movements. Through an in-depth analysis of printed and electronic media, the study examines the impacts of these sacrifices on the academic and personal lives of those involved. The paper highlights examples from various universities, demonstrating student activism's long-term and short-term effects, including disciplinary actions, social backlash, and career implications. The researchers also explore the broader implications of student sacrifices. The findings reveal that these sacrifices are driven by a profound commitment to justice and human rights, and are influenced by the increasing availability of information, peer interactions, and personal convictions. The study also discusses the broader implications of this activism, comparing it to historical precedents and assessing its potential to influence policy and public opinion. The emotional and psychological toll on student activists is significant, but their sense of purpose and community support mitigates some of these challenges. However, the researchers call for acknowledging the broader Impact of these sacrifices on the future global movement of FreePalestine.
Chapter wise All Notes of First year Basic Civil Engineering.pptxDenish Jangid
Chapter wise All Notes of First year Basic Civil Engineering
Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
Linear Measurements: Instruments used. Linear Measurement by Tape, Ranging out Survey Lines and overcoming Obstructions; Measurements on sloping ground; Tape corrections, conventional symbols. Angular Measurements: Instruments used; Introduction to Compass Surveying, Bearings and Longitude & Latitude of a Line, Introduction to total station.
Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
Chapter 4
Buildings: Selection of site for Buildings, Layout of Building Plan, Types of buildings, Plinth area, carpet area, floor space index, Introduction to building byelaws, concept of sun light & ventilation. Components of Buildings & their functions, Basic concept of R.C.C., Introduction to types of foundation
Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
This presentation was provided by Rebecca Benner, Ph.D., of the American Society of Anesthesiologists, for the second session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session Two: 'Expanding Pathways to Publishing Careers,' was held June 13, 2024.
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
IB Biology Internal Assessment
1. Running head: BIOLOGY 1
Internal Assessment
Student Name
Institution
Date
How do different levels of light affect the rate of seed germination in radishes?
2. BIOLOGY !2
Abstract
The aim of this study was to determine how different levels of light affect the rate of seed
germination in radishes (Raphanus sativus). Light is a necessary condition in the germinating
plant that is necessary for occurrence of photosynthesis. Deeply buried seedlings die if not
exposed to light. The available food supply is exploited and more is needed to support growth.
Availability of the element is not a requisite but plays an important role in some plant species.
Some seeds require light while others need darkness. However, some are not affected by any of
the conditions. The above aspects are necessary for the imbibition of water, increase in metabolic
activity and swelling of cells. It leads to germination. Six seeds were mixed in soil and water in a
petri dish. The apparatus were organized in three groups exposed to different lighting conditions.
One labeled arrangement was exposed to maximum, partial and zero sunlight. Same measures of
the variables were used across all the setups. The observations after three days showed that the
seeds in darkness germinated as well as those kept in much sunlight. It falsified the alternative
and justified the null hypotheses.
3. BIOLOGY !3
Table of Contents
Abstract 2.......................................................................................................
Table of Contents 3............................................................................................
Personal Statement 4..........................................................................................
Design 4..........................................................................................................
Aim 4..........................................................................................................
Research question 4.........................................................................................
Introduction 4................................................................................................
Hypotheses 6.................................................................................................
Variables 6....................................................................................................
Method 8.........................................................................................................
Apparatus and materials 8.................................................................................
Safety requirements 9......................................................................................
Procedure 9...................................................................................................
Data Collection and Processing 12...........................................................................
Qualitative 12................................................................................................
Quantitative data 12........................................................................................
Conclusion 14...................................................................................................
Discussion 14....................................................................................................
Evaluation 15.................................................................................................
Improvements 15............................................................................................
4. BIOLOGY !4
Personal Statement
A study on the effect of light on germination of the radish seeds is important to my
prospects of growing the plant in my garden and farm. In return, my interest in gardening drove
me to investigate how different levels of light affect the rate of seed germination in radishes.
Design
Aim
The aim of this study is to determine how different levels of light affect the rate of seed
germination in radishes.
Research question
How do different levels of light affect the rate of seed germination in radishes?
Introduction
Germination is the process by which a seed embryo begins growing. The process begins
when the embryonic root bursts through the seed coat. Most plants begin developing through the
natural procedure. Some seeds germinate immediately whereas others have to stay for a
dormancy period. However, all varieties only resume growth when a set of conditions are
available to permit the process.
References 16...................................................................................................
5. BIOLOGY !5
The waiting time in some plants’ seeds is meant to fulfill some prerequisites. For
instance, temperature and mechanical processes affect the duration taken by certain plant species
to germinate. Other aspects in play include the incomplete seed development, an impervious seed
oat, presence of regulators of growth and a need for pre-chilling.
Generally, all varieties of seeds require favorable environmental conditions for successful
germination. The most critical provisions are the optimal temperature, moisture, air and
appropriate light levels. However, the specific amount of the above variables differs for each
plant type. Optimal temperatures neutralize the effect of chemicals that inhibit growth in the
embryo. Appropriate warmth levels permit the metabolic processes that support growth. It may
vary among species and the environmental conditions.
Water is an essential component that causes the expansion of the embryo as well as the
softening of the encasing coat. Furthermore, more moisture is required in the vigorous
metabolism of the plant during germination. Besides, it is important for removal of inhibitors of
the process.
Light is a necessary condition in the germinating plant for the occurrence of
photosynthesis. Deeply buried seedlings die if not exposed to light. The available food supply is
exploited and more is needed to support growth. Availability of the element is not a requisite but
plays an important role in some plant species. Some seeds require light while others need
darkness. However, some are not affected by any of the conditions. The above aspects are
necessary for the imbibition of water, increase in metabolic activity and swelling of cells. It leads
6. BIOLOGY !6
to germination. Phytochrome is a photoreceptor pigment in light-sensitive seeds’ coats. It
communicates with the seed to trigger or stop germinating in response to the environment.
Radish (Raphanus spp.) is a cool season vegetable plant that grows easily when the
conditions are favorable. Although native to China, it can grow in the hardiness zones in some
parts of the US. The crop thrives well when planted outdoors with maximum exposure to
sunlight of six to eight hours per day. Radish seeds germinate properly under temperature
conditions of 55 to 75 degrees Fahrenheit. It takes 3-4 days under the ideal circumstances for the
seeds to fully germinate. However, it may never sprout or take longer if it’s planted deeper or in
cool soils. A minimum of 6 hours exposure to light is necessary for the performance of the crop.
Hypotheses
Null hypothesis (H0): The different levels of light do not affect the rate of germination. No
notable differences in growth of radish seedlings in varied lighting conditions.
Alternative hypothesis (H1): The germination of seeds exposed to 1005 of light is at a higher rate
than the ones in limited exposure. Radish seeds will need sunlight top germinate since the crop
requires light to grow. Some seeds will germinate in the lit samples as well as the dark ones. In
the experiment, most of the seeds exposed to direct sunlight will germinate compared to the ones
in darkness or under shade.
Variables
The independent variable
7. BIOLOGY !7
Hours of exposure to direct sunlight- the determinant factor is the level of light. Seeds of radish
will be exposed to different hours of direct sunlight. For instance, the sets will be 7 hours, 3
hours and zero hours.
Dependent variable
The rate of germination in the experiment will be measured by the number of radish seedlings
that will germinate under different sunlight conditions.
Controlled variables
Variable How Reason
Temperature The samples were kept in a
room that as maintained at
25°C.
The procedure was essential
to remove the environmental
factor that would cause
differential warmth in the soil.
Water volume The volume of water used to
moist the soil was determined
by the measuring cylinder
instead of a beaker
Having the same level of
moisture in all set-ups was
important to rule out its
moderating effect
Mass of soil used The quantity of soil in which
the seeds were planted was
determined by the weighing
machine.
The mass of the soil upon
which the seeds are planted is
regulated to avoid differences
in depth of exposure.
8. BIOLOGY !8
Method
Apparatus and materials
➢ 12 petri dishes
➢ 72 radish seeds
➢ 12 sandwich bags
Humidity The same room was used for
the experiment all the time
The step was necessary to
manage the variation in
humidity that can affect the
rate of germination
Plant species One variety of Radish plant
seeds were used, Raphanus
sativus
To keep the seed
characteristics similar so that
no variety will have
extraneous rates over others
Setup used The same setup was used
throughout the experiment for
all variables
To reduce the variation in
results due to inaccuracies and
invalidities of the process
9. BIOLOGY !9
➢ 60 ml of distilled water
➢ 24 filters
➢ 1x Marker pen
➢ 1x Measuring cylinder
➢ 1x Beaker
➢ Lump of soil
➢ 1x Thermometer calibrated in degrees Celsius
Safety requirements
The hand gloves and a lab coat were used to protect one from being dusted or dirtied with soil
and mud.
Procedure
➢ Collect all the materials and apparatus stipulated above
➢ Divide 12 petri dishes into groups of four. Label them according to the following
categories;
I. 4 Labeled 7 hour exposure
II. 4 Labeled 3 hour exposure
III. 4 Labelled darkness/ zero exposure
➢ Place one filter on the bottom of each petri dish
10. BIOLOGY !10
➢ Spread uniformly six seeds of the Radish plant on the filter in each petri dish
➢ Using the measuring cylinder, measure 5ml of distilled water and pour on the seeds
➢ Using the weighing machine, weigh 10g of soil from the lump and spread on top of the
Radish seeds
➢ Place a covering filter on top of each petri dish
➢ Cover the apparatus with a lid
➢ Keep a complete set of the petri dish into a sandwich and put in a bag
➢ Label three boxes with; 7 hour exposure, three hour exposure and darkness
➢ Place all the categories of petri dishes into differently labeled boxes
➢ Place the boxes in a darkened room.
➢ Every day take the 7-hour labeled petri dishes to a field under direct sunlight direct
sunlight from 7 am to 2.pm, the 3-hour labeled ones from 7am to 10am. Keep the dishes
labeled dark or zero hours in the dark room drawer for the 4 days of the experiment.
➢ Remove the exposed petri dishes keeping them in their respective boxes after the time
expires.
➢ Check the petri dishes from the second to the fourth day to see if the seeds have
germinated.
Control: the radish seeds kept in the total darkness
11. BIOLOGY !11
Replication of the experiment: The four radish seed petri dishes exposed to longer duration of
sunlight, lesser time and in dark without light.
Figure 1-7: The petri dishes set up
! !
Planted set up after the 3rd day
! !
Petri kept in darkness 7 hour exposure setup 3-Hour exposure set-up
12. BIOLOGY !12
! ! !
Data Collection and Processing
Qualitative
The seeds began germinating from the second to the third day. The entire apparatus was observed
and seedlings emerged from the petri dishes. However, the ones exposed to the sunlight
germinated the first.
Quantitative data
The raw data of the number of seedlings that germinated in each category of sunlight exposure
are shown in the following table. Figure 8
Duration of exposure to
light
Number of seeds that
germinated
Average rate of
germination
Percentage rate of
germination
No light/ darkness 21 5.3 88%
3-hour direct sunlight 19 4.8 80%
7-hour direct sunlight 22 5.5 92%
13. BIOLOGY !13
Figure 9: Below is the chart showing the average rate of germination at different levels of
sunlight exposure.
!
Seed germination rate
4.6
4.8
5.1
5.3
5.5
No sunlight/darkness 3-Hour Exposure 7-Hour Exposure
Seed germination rate
14. BIOLOGY !14
The observed rates indicated that the rate of germination of the radish seeds for the petri dishes
exposed to longer sunlight hours was the same as that kept entirely in darkness. However, the
time taken for the seedlings to sprout was shorter for the ones placed in light.
Conclusion
The study findings falsified the alternative hypothesis. It confirmed that there is no
difference in the rate of germination of seeds kept in the light for a long duration and the ones in
darkness. Varying levels of sunlight does not affect the process. The percentage rate of growth
was 92%, 80% and 88% for seeds exposed to sunlight for 7 hours, 3 hours and zero hours
respectively. Out of the 24 seeds exposed to light for the maximum duration, 22 of them
germinated. On the other hand, 21 seeds out of 24 placed in sunlight for 3 hours sprout up.
Finally, the ones kept in darkness had 88% germination rate.
Discussion
The results observed in the experiment surprised the foundation of our understanding.
Although light is essential for the growth of the radish plant, it is not necessary for the
germination. Both the seeds kept in maximum sunlight as well as those placed in total darkness
germinated at the same rates. On the other hand, the difference was significant for the seeds that
were exposed to shorter hours of sunlight. Generally, the variations in the three apparatus were
minimal.
The experiment indicates that the seeds did not need the sunlight for sprouting. Radish
seeds can germinate well in darkened gardens inside the house. Such findings are important to
15. BIOLOGY !15
the farmers of the crop. Gardeners can also realize that the crop can be planted deep in the soil. It
will perform well because it does not need the sun to begin the growth process.
A significant observation on the effect of light was on the strength of the seedlings’
stems. The seeds exposed to the sunlight had straight stems whereas the ones in darkness were
feeble with coiling shoots. It indicates the importance of sunlight at the growing stage after
germination.
Evaluation
The study findings agree with the existing works of Rillero (2010) that light has no effect
on germination of radish seeds (Ravanus sativus). Kolodziejel (2015) supported the facts holding
from his experiment that the species germinates in light as well as dark conditions. Bewley
(2012) justifies the phenomena stating that the plant variety is insensitive to the effect of lighting
during germination (Bewley, 2012).
Although the results of the study mirror the findings of existing literature, some aspects
that could have affected the observed outcomes are analyzed. A variable like outside temperature
was not controlled when the samples were exposed to the sunlight. It could have contributed to
the death of the seeds. Secondly, the salinity of the soil was not determined and its consequences
were ignored. Thirdly, the mass of the seeds was not measured.
Improvements
To improve the findings next time, the experiment will be carried out in a room and the source of
light will be a glowing lamp. It has minimal heat in the light it emits. Therefore, it will eliminate
the chances of death of seeds due to the heating effect of the sunlight. Secondly, the salinity of
16. BIOLOGY !16
the soil will be determined so that a neutral lump is used. Thirdly, the mass of the seeds used will
be obtained to ensure that a standard measure applies for all seedlings. Further studies will also
seek to determine the impact of differences in the weight of the radish seed in intervening
germination.
References
Bewley, J. (2012). Seeds: Physiology of Development and Germination. New York: Springer.