Variability of some physicochemical properties on Lithosequence in Funtua, Northwestern, Nigeria were studied to determine the extent of variation in physical and chemical properties within and between soils developed on basement complexes, loess over basement complexes and loess parent materials. Variability was more pronounced in chemical than in physical properties. Particle density (CV = 0.23%) and exchangeable sodium percentage (CV = 2.23) were the least variable physicochemical properties. Physicochemical properties with highest variability are Si/C ratio (CV =88.29%) and AP (CV = 149%). Less variability (CV ≤ 15%) irrespective of soils were recorded in particle density, bulk density and pH, and therefore required similar management for all the soils. Silt, AWHC, CEC, CEC clay and base saturation were consistently moderately variable (CV: >15 ≤ 35%). Silt/clay ratio, K, OC, TN, AP and AS were consistently highly variable CV > 35%). Large proportion of properties of the soils were highly variable in all the soils with 10 (42%) of physicochemical properties of soils on BC, 9 (38%) on LBC and 13 (54%) on LS. The highly variable status was attributed to difference in land use types, management and cultural practices occurring within the study area. Properties significantly influenced by Lithosequence include available water holding capacity, magnesium, potassium, CEC and TEA. They were significantly highest in soils on loess and contributed to variation in pattern of nutrient and exchangeable bases retention.
Variability in the physicochemical properties of soils of different land uses form from the same lithology was studied. Soil samples were collected from surface (0 – 20 cm) and subsurface (20 – 40 cm) depths from three land use namely fallow land, continuous cultivated land and mechanic village land. The soils were air dried, sieved with 2 mm sieve and subjected to routine laboratory analysis. Results obtained were subjected to analysis of variance (ANOVA) and significant treatment means were separated using Least Significant Difference (LSD) at 0.05 probability level. Relationship between selected soil properties were determined using correlation analysis. Results showed that the textures of the studied soils were not affected by land use practices. Bulk density increased with increase in depth with fallow land recoding the lowest values of 0.86 g/cm3 (0.-20 cm depth) and 1.06 g/cm3 (20 – 40 cm depth). Land use types significantly (P = 0.05) affected soil chemical properties such as soil pH, soil organic carbon, total N, available P and exchangeable cations with the highest values recorded in fallow land, followed by palm plantation and the least was continuous cultivated land. There were slight variations among soil properties in the three land use types studied. Significant positive and negative correlations existed and some soil properties. Good soil management practices such as organic fertilization, zero tillage and mulching is recommended especially in continuous cultivated lands.
Variability of some physicochemical properties on Lithosequence in Funtua, Northwestern, Nigeria were studied to determine the extent of variation in physical and chemical properties within and between soils developed on basement complexes, loess over basement complexes and loess parent materials. Variability was more pronounced in chemical than in physical properties. Particle density (CV = 0.23%) and exchangeable sodium percentage (CV = 2.23) were the least variable physicochemical properties. Physicochemical properties with highest variability are Si/C ratio (CV =88.29%) and AP (CV = 149%). Less variability (CV ≤ 15%) irrespective of soils were recorded in particle density, bulk density and pH, and therefore required similar management for all the soils. Silt, AWHC, CEC, CEC clay and base saturation were consistently moderately variable (CV: >15 ≤ 35%). Silt/clay ratio, K, OC, TN, AP and AS were consistently highly variable CV > 35%). Large proportion of properties of the soils were highly variable in all the soils with 10 (42%) of physicochemical properties of soils on BC, 9 (38%) on LBC and 13 (54%) on LS. The highly variable status was attributed to difference in land use types, management and cultural practices occurring within the study area. Properties significantly influenced by Lithosequence include available water holding capacity, magnesium, potassium, CEC and TEA. They were significantly highest in soils on loess and contributed to variation in pattern of nutrient and exchangeable bases retention.
Variability in the physicochemical properties of soils of different land uses form from the same lithology was studied. Soil samples were collected from surface (0 – 20 cm) and subsurface (20 – 40 cm) depths from three land use namely fallow land, continuous cultivated land and mechanic village land. The soils were air dried, sieved with 2 mm sieve and subjected to routine laboratory analysis. Results obtained were subjected to analysis of variance (ANOVA) and significant treatment means were separated using Least Significant Difference (LSD) at 0.05 probability level. Relationship between selected soil properties were determined using correlation analysis. Results showed that the textures of the studied soils were not affected by land use practices. Bulk density increased with increase in depth with fallow land recoding the lowest values of 0.86 g/cm3 (0.-20 cm depth) and 1.06 g/cm3 (20 – 40 cm depth). Land use types significantly (P = 0.05) affected soil chemical properties such as soil pH, soil organic carbon, total N, available P and exchangeable cations with the highest values recorded in fallow land, followed by palm plantation and the least was continuous cultivated land. There were slight variations among soil properties in the three land use types studied. Significant positive and negative correlations existed and some soil properties. Good soil management practices such as organic fertilization, zero tillage and mulching is recommended especially in continuous cultivated lands.
Impact of Land Use Systems and Parent Materials on Soil Quality Indicators in...BRNSS Publication Hub
A study on the impact of parent materials and land use on soil quality indicators in soils of Akwa Ibom State was conducted. The aim was to evaluate the impact of parent materials and land use systems on soil quality indicators. Three parent materials (coastal plain sand, sandstone/shale, and beach ridge sand) and three land use types (cultivated land, fallow land of 3–5 years, and oil palm plantation) were selected for the study. In each land use type per parent material, six composite soil samples were collected from the representative location within the three land use types using soil auger within 0–30 cm soil depth. Undisturbed core samples were also collected for bulk density and saturated hydraulic conductivity determinations. A total of 52 soil samples were generated for laboratory analysis. Results showed that among the parent materials, coastal plain sand soil had the highest silt + clay fraction, organic matter, total N, available P, and exchangeable K, followed by sandstone/shale while beach ridge sand soil had the least. Among the land use types, oil palm plantation had the highest silt + clay fraction, organic matter, exchangeable Ca and K, followed by fallow land while cultivated land had the least. The combination of parent material and land use indicated that cultivated, fallow and oil palm plantation of coastal plain sand soils had the highest water and nutrient holding capacity, high rooting volume, good aeration status, less erosion threat, higher exchange sites, more available nutrients for plant uptake, more biological activity, etc., followed by sandstone/shale while beach ridge sand had the least in the study area. The application of more organic and less inorganic fertilizers will improve the soil quality of the study area.
Effect application of sea sand, coconut and banana coir on the growth and yie...NurdinUng
The research was aimed to study effect application of sea sand (SS), coconut coir (CC) and banana coir (BC) on the growth and yield of rice (Oryza sativa L.) planted at Ustic Endoaquert soil. The pot experiment was carried out using a factorial design with 3 factors. The first factor was SS consisted of three levels i.e.: 0%, 25%, and 50%. The second and third factors were CC and BC, each consisted of three levels i.e.: 0, 10, and 20 Mg ha-1. Application of SS and BC significantly increased leaf length where the highest increasing percentage was 16.47% which was achieved at 25% SS application. Their effect on leaf numbers and tiller numbers were relatively not similar pattern where leaf number only increased about 65.52% by BC application, while tiller numbers only increased about 10.77% by SS application. Furthermore, the application of CC and BC significantly increased panicle numbers to 29.53% and 29.05%, respectively compared to control. All ameliorants significantly increased panicle numbers, but the best was CC with the increasing up to 46.49% at 20 Mg ha-1 CC compared to SS or BC application. However, only coconut coir significantly increased the rice grain numbers.
Bacteria and Fungi Population of Surface Soils under Various Land Use Types i...BRNSS Publication Hub
The study was carried out at the Teaching and Research Farm of the School of Agriculture and Agricultural
Technology, Minna, in the month of July 2014. The aim of the study was to estimate the bacteria and
fungi population of three selected vegetation types at three soil depths and correlate microbial counts
with the physicochemical properties of soils. The experiment was a 3 by 3 factorial experiment, arranged
in a completely randomized design. The treatments were vegetation types (fallow, gmelina, and teak)
and three soil depths (0–5 cm, 5–10 cm, and 10–15 cm). Data obtained were subjected to ANOVA while
means were separated using the Student–Newman–Keuls test Linear relationship. The standard pour
plate method was used to estimate bacteria and fungi colony-forming units (CFU) in 1 g soil. Physical
and chemical analyses were carried out by standard laboratory methods. The bacterial and fungal counts
were highest in the gmelina vegetation and least under teak. The 0–5 cm soil depth had the highest
microbial counts. Bacterial population correlated positively and significantly with the fungal population
and organic content while microbial population correlated negatively with soil pH. Gmelina vegetation
produced the highest microbial population followed by fallow and teak in that sequence. Fallow
recorded the narrowest C/N and C/P ratios, respectively, implying N mineralization and P solubilization
while the tree vegetations recorded wider ratios signifying N and P immobilization. It can, therefore, be
inferred from the results obtained that tree vegetations can be under cultivation with much sacrifice in
inorganic N and P fertilizers. Fallow land, on the other hand, will require lower inorganic N and P inputs
and, therefore, has prospects in reduction of environmental pollution and subsequent increase in crop
production.
Effects of Irrigation Practices on Some Soil Chemical Properties on OMI Irrig...IJERA Editor
Irrigation practices have been observed to impact scheme soil properties and other parameters negatively. These could be as a result of irrigation water quality, method of application and nature of scheme soil. This study was therefore conducted to study the effects of irrigation practices on the soils of Omi irrigation scheme Kogi state, Nigeria after 13years of operation. Soil samples were taken at depths 0 – 20 cm (A1), 20 – 80 cm (A2) and 80 – 120 cm (A3) from two operating lands (OL); OL 5 and OL 18 of the study area. The samples were analysed for chemical parameters (pH, CEC, ESP, Mg2+, Ca2+, OM, and OC). The soil pH which was in the neutral range (pH=6.65 to 7.00) at inception of scheme, has become slightly acidic (pH=6.53 to 6.60). Cation exchange capacity (CEC) levels have also increased from 10cmol+kg-1 to 35cmol+kg-1. While Organic matter (OM) and Organic carbon (OC) also have marked increase in their levels (baseline as 0.93 to 1.08; for year 2013 as 9.52 to 9.79). Generally, the analysis indicated a need for proper monitoring of the scheme soil to prevent further deterioration.
Impact of Land Use Systems and Parent Materials on Soil Quality Indicators in...BRNSS Publication Hub
A study on the impact of parent materials and land use on soil quality indicators in soils of Akwa Ibom State was conducted. The aim was to evaluate the impact of parent materials and land use systems on soil quality indicators. Three parent materials (coastal plain sand, sandstone/shale, and beach ridge sand) and three land use types (cultivated land, fallow land of 3–5 years, and oil palm plantation) were selected for the study. In each land use type per parent material, six composite soil samples were collected from the representative location within the three land use types using soil auger within 0–30 cm soil depth. Undisturbed core samples were also collected for bulk density and saturated hydraulic conductivity determinations. A total of 52 soil samples were generated for laboratory analysis. Results showed that among the parent materials, coastal plain sand soil had the highest silt + clay fraction, organic matter, total N, available P, and exchangeable K, followed by sandstone/shale while beach ridge sand soil had the least. Among the land use types, oil palm plantation had the highest silt + clay fraction, organic matter, exchangeable Ca and K, followed by fallow land while cultivated land had the least. The combination of parent material and land use indicated that cultivated, fallow and oil palm plantation of coastal plain sand soils had the highest water and nutrient holding capacity, high rooting volume, good aeration status, less erosion threat, higher exchange sites, more available nutrients for plant uptake, more biological activity, etc., followed by sandstone/shale while beach ridge sand had the least in the study area. The application of more organic and less inorganic fertilizers will improve the soil quality of the study area.
Effect application of sea sand, coconut and banana coir on the growth and yie...NurdinUng
The research was aimed to study effect application of sea sand (SS), coconut coir (CC) and banana coir (BC) on the growth and yield of rice (Oryza sativa L.) planted at Ustic Endoaquert soil. The pot experiment was carried out using a factorial design with 3 factors. The first factor was SS consisted of three levels i.e.: 0%, 25%, and 50%. The second and third factors were CC and BC, each consisted of three levels i.e.: 0, 10, and 20 Mg ha-1. Application of SS and BC significantly increased leaf length where the highest increasing percentage was 16.47% which was achieved at 25% SS application. Their effect on leaf numbers and tiller numbers were relatively not similar pattern where leaf number only increased about 65.52% by BC application, while tiller numbers only increased about 10.77% by SS application. Furthermore, the application of CC and BC significantly increased panicle numbers to 29.53% and 29.05%, respectively compared to control. All ameliorants significantly increased panicle numbers, but the best was CC with the increasing up to 46.49% at 20 Mg ha-1 CC compared to SS or BC application. However, only coconut coir significantly increased the rice grain numbers.
Bacteria and Fungi Population of Surface Soils under Various Land Use Types i...BRNSS Publication Hub
The study was carried out at the Teaching and Research Farm of the School of Agriculture and Agricultural
Technology, Minna, in the month of July 2014. The aim of the study was to estimate the bacteria and
fungi population of three selected vegetation types at three soil depths and correlate microbial counts
with the physicochemical properties of soils. The experiment was a 3 by 3 factorial experiment, arranged
in a completely randomized design. The treatments were vegetation types (fallow, gmelina, and teak)
and three soil depths (0–5 cm, 5–10 cm, and 10–15 cm). Data obtained were subjected to ANOVA while
means were separated using the Student–Newman–Keuls test Linear relationship. The standard pour
plate method was used to estimate bacteria and fungi colony-forming units (CFU) in 1 g soil. Physical
and chemical analyses were carried out by standard laboratory methods. The bacterial and fungal counts
were highest in the gmelina vegetation and least under teak. The 0–5 cm soil depth had the highest
microbial counts. Bacterial population correlated positively and significantly with the fungal population
and organic content while microbial population correlated negatively with soil pH. Gmelina vegetation
produced the highest microbial population followed by fallow and teak in that sequence. Fallow
recorded the narrowest C/N and C/P ratios, respectively, implying N mineralization and P solubilization
while the tree vegetations recorded wider ratios signifying N and P immobilization. It can, therefore, be
inferred from the results obtained that tree vegetations can be under cultivation with much sacrifice in
inorganic N and P fertilizers. Fallow land, on the other hand, will require lower inorganic N and P inputs
and, therefore, has prospects in reduction of environmental pollution and subsequent increase in crop
production.
Effects of Irrigation Practices on Some Soil Chemical Properties on OMI Irrig...IJERA Editor
Irrigation practices have been observed to impact scheme soil properties and other parameters negatively. These could be as a result of irrigation water quality, method of application and nature of scheme soil. This study was therefore conducted to study the effects of irrigation practices on the soils of Omi irrigation scheme Kogi state, Nigeria after 13years of operation. Soil samples were taken at depths 0 – 20 cm (A1), 20 – 80 cm (A2) and 80 – 120 cm (A3) from two operating lands (OL); OL 5 and OL 18 of the study area. The samples were analysed for chemical parameters (pH, CEC, ESP, Mg2+, Ca2+, OM, and OC). The soil pH which was in the neutral range (pH=6.65 to 7.00) at inception of scheme, has become slightly acidic (pH=6.53 to 6.60). Cation exchange capacity (CEC) levels have also increased from 10cmol+kg-1 to 35cmol+kg-1. While Organic matter (OM) and Organic carbon (OC) also have marked increase in their levels (baseline as 0.93 to 1.08; for year 2013 as 9.52 to 9.79). Generally, the analysis indicated a need for proper monitoring of the scheme soil to prevent further deterioration.
IOSR Journal of Applied Chemistry (IOSR-JAC) is an open access international journal that provides rapid publication (within a month) of articles in all areas of applied chemistry and its applications. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Chemical Science. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
DOI: 10.21276/ijlssr.2016.2.3.14
ABSTRACT- The physico-chemical properties of four lands use types in Akokwa of Ideato North, Imo State, Nigeria
were determined. The land use patterns were fallow land (FL), cassava continuously cultivated land (CL), Oil palm
plantation (OPL) and Yam plot (YL). Composite samples were collected from various depths (0 -15 cm, 15 – 30 cm,
30 – 45 cm) across these land use patterns and analyzed in the laboratory. Data generated were subjected to analysis of
variance. Results obtained showed significant difference (P≤0.05) in soil bulk density, organic carbon (OC), total nitrogen
(TN), available phosphorus (Av. P) and ECEC across the four land use types. The bulk density value was highest at
30 – 45 cm depth by CL (1.93 g/cm3), followed by YL (1.89 g/cm3), OPL (1.70 g/cm3) and FL (1.68 g/cm3). The TN
content of the soil was highest in the FL at 0 – 15 cm depth (0.25%) while the lowest was found in the CL plot (0.03%).
The soil Av. P content was highest in the FL at 0 – 15 cm depth (9.63 mg/kg) while the lowest value was obtained in CL
plot (1.16 mg/kg). The values of OC at the depths of 0 – 15 cm, 15 – 30 cm and 30 – 45 cm in the FL (1.03%, 0.49%.
0.45%) were found to be significantly different (P≤0.05) from the CL (0.39%, 0.15%, 0.13%) land use type. Results
obtained showed that different land use types have varying effects on soil physical and chemical properties. The fallow
land had on the surface (0 – 15 cm) the highest content of soil chemical properties and lowest bulk density. Therefore,
farmers may periodically fallow their lands to build up organic matter, stabilize soil aggregates, improves nutrient cycles
for sustainable productivity.
Key-words- Land use, Soil chemical properties, Bulk density, Fallow land, Cassava land, Yam land, Oil palm land
Abstract— This study was conducted in Gunugo watershed at Wolayitta zone to assess the amount of some soil chemical properties affected by traditional agroforestry practices and along different elevation gradients. The dominant agroforestry practices (homegarden, parkland and woodlot), and three elevation gradients (upper, middle and lower) were used to collect soil samples. One composite sample was taken from each sampling point from each soil depths, under three agroforestry practices and three elevation gradient with three replications to have a total of 54 soil samples at 20 x 20 m plot. Then the selected soil chemical properties among agroforestry practices and along elevation gradient was determined at p<0.05. The EC, pH and CEC of the top soil was significantly higher on homegarden than parkland and woodlot while EC, pH and total nitrogen of the sub soil were significantly higher on homegarden than parkland and woodlot. Further, only the top soil EC and CEC were significantly higher on lower elevation than upper and middle elevation and there was no significant difference in sub soil chemical parameters among elevation levels. In relation to this, most of the soil chemical properties show as the study area is being degraded. Therefore, are recommended for sustainable soil chemical property management. Hence, homegarden is suggested as a better agroforestry practice for rehabilitation of the area in a sustainable manner through enhanced accumulation of total nitrogen, good EC and CEC at all elevation gradients.
Quantification of annual soil greenhouse gas emissions under different land u...ILRI
Prepared by Sheila Wachiye , Lutz Merbold, Timo Vesala, Janne Rinne, Matti Räsänen and Petri Pellikka for the General Assembly 2019 of the European Geosciences Union (EGU), Vienna, Austria, 7–12 April 2019.
Impact of crop rotation on mycorrhizal fungi in irrigated soils of the Doukka...Agriculture Journal IJOEAR
Abstract— This study has been conducted on the soils of irrigated perimeter of Doukkala. It is to assess the impact of the rotation of a species not mycotrophic (Beta vulgaris) with cereals on the natural resources of the mycorrhizal arbuscular fungi whose profits for the growth of plants are known. The results obtained show that this type of culture has a negative effect on the richness of the soil in spores and diversity of mycorrhizal fungi, and on the content of arbuscules which are the places of exchanges between the partners. The authors offer recommendations on cultivation practices which can be modulated in order to preserve this natural resource.
Cadmium and lead hazards as occurring with their speciations in periurbain ag...Premier Publishers
Environment pollution hazard awareness is required for less industrialized countries which are faced with increasing periurban agriculture practice however. Lead (Pb) and Cadmium (Cd) were characterized around Abidjan city (Bingerville, Port-Bouët and Yopougon) in soil, perched ground water and vegetable crops (Hibiscus and sweet potato). Total amounts and speciations of metals were determined respectively. The sites were mainly differing with pH observed at Yopougon characterized by highest soil content of Pb (40 mg kg-1). In contrast with the low soil contents of metals, plant contaminations were observed in the root for Cd and Pb at Yopougon and Port-Bouët sites respectively with variance involving above and below ground organs as specific contamination of Hibiscus or sweet potato. Skeleton fractions as exchangeable (F1) and carbonate bound (F2) were characterizing these contaminations although additional fraction as oxide bound (F3) Cd and organic (F4) Pb were required respectively for effectiveness. The non-polluted perched groundwater pH, Eh, temperature and O2 concentration were likely concerned by these fractions availability beside that of residual fraction (F5) of Cd. Enhance isomorphic substitution of anionic Pb forms transforming F2 into F5 and the cationic substitutions between Cd and Pb were suggested for pollution management.
Studies on the impact of crude oil exploration on soil quality and crops grow...Premier Publishers
The present study evaluated the impact of crude oil exploration on soil quality and crops grown in Kpean Community in Khana Local Government Area of Rivers State. Soil samples were collected at a depth of 0-50cm3 using plastic auger while tuber crops and vegetables were harvested from the same spot as the soils. Findings from this study showed an increase in soil temperature, moisture, electrical conductivity and organic matter content of crude oil impacted soil compared to control (P<0.05).soil><0.05).><0.05)><0.05). The results of this study indicates that crude oil pollution of agricultural farmlands in Kpean Community is yet to be remedied even after 20 years following oil spillage and the soil still remain unsuitable for crop production. Hence, proper remediation of the studied area is paramount in order to reduce metal accumulation and subsequent exposure of the populace to metal poisoning via food chain.
The International Journal of Engineering and Science (The IJES)theijes
The International Journal of Engineering & Science is aimed at providing a platform for researchers, engineers, scientists, or educators to publish their original research results, to exchange new ideas, to disseminate information in innovative designs, engineering experiences and technological skills. It is also the Journal's objective to promote engineering and technology education. All papers submitted to the Journal will be blind peer-reviewed. Only original articles will be published.
The papers for publication in The International Journal of Engineering& Science are selected through rigorous peer reviews to ensure originality, timeliness, relevance, and readability
Variability in the physicochemical properties of soils of different land uses form from the same lithology was studied. Soil samples were collected from surface (0 – 20 cm) and subsurface (20 – 40 cm) depths from three land use namely fallow land, continuous cultivated land and mechanic village land. The soils were air dried, sieved with 2 mm sieve and subjected to routine laboratory analysis. Results obtained were subjected to analysis of variance (ANOVA) and significant treatment means were separated using Least Significant Difference (LSD) at 0.05 probability level. Relationship between selected soil properties were determined using correlation analysis. Results showed that the textures of the studied soils were not affected by land use practices. Bulk density increased with increase in depth with fallow land recoding the lowest values of 0.86 g/cm3 (0.-20 cm depth) and 1.06 g/cm3 (20 – 40 cm depth). Land use types significantly (P = 0.05) affected soil chemical properties such as soil pH, soil organic carbon, total N, available P and exchangeable cations with the highest values recorded in fallow land, followed by palm plantation and the least was continuous cultivated land. There were slight variations among soil properties in the three land use types studied. Significant positive and negative correlations existed and some soil properties. Good soil management practices such as organic fertilization, zero tillage and mulching is recommended especially in continuous cultivated lands.
Fertility Levels of Soils under Selected Tree Vegetations for Efficient Agro-...AI Publications
In many parts of Nigeria, large areas of lands are dominated by tree crop vegetations for timber production and for fruits with land users not knowing the fertility status of soils in these vegetations. Continual evaluation of soil properties of these tree vegetations has become pertinent for agricultural sustainability. This study therefore was carried out to evaluate the fertility levels of soils under selected tree vegetations at National Horticultural Research Institute Okigwe, Imo State, Nigeria. Five tree vegetations that were over 20 years of establishment were selected namely: oil bean (Pentaclethra macrophylla Benth), African breadfruit (Treculia africana), mango (Mangnifera indica), Ogbonu (Irvingia gabonensis) and orange (citrus spp). In each of these tree vegetations, four soil samples were collected at uniform depths (0 – 20, 20 – 40 and 40 – 60 cm) at different locations using soil auger. The samples were analyzed using standard laboratory procedures. Data collected were statistically analyzed using analysis of variance. Results obtained showed that despite the ages of these vegetations, the soils were acidic, low in macronutrient and basic cation concentrations when compared to FAO standard. The highest exchangeable bases and organic matter (1.78%) was recorded on bread fruit vegetation. Therefore, there is need to increase the fertility status of these soils in these tree crop vegetations by adopting measures that will boost organic matter content of the soil irrespective of the duration of the vegetation and this will help in agro forestry and alley cropping.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
Slack (or Teams) Automation for Bonterra Impact Management (fka Social Soluti...Jeffrey Haguewood
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on the notifications, alerts, and approval requests using Slack for Bonterra Impact Management. The solutions covered in this webinar can also be deployed for Microsoft Teams.
Interested in deploying notification automations for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
Key Trends Shaping the Future of Infrastructure.pdf
Influence of Different Soil Management Practices On Soil Properties and Its Implication on Soil Productivity
1. IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS)
e-ISSN: 2319-2380, p-ISSN: 2319-2372. Volume 5, Issue 1 (Sep.- Oct. 2013), PP 19-22
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Influence of Different Soil Management Practices On Soil
Properties and Its Implication on Soil Productivity
1
Mbah, C.N1., E. E. Attoe2 and U.F. Nwagu1
Department of Soil Science and Environmental Management Ebonyi State University, Abakaliki,Ebonyi State,
Nigeria.
2
Department of Agronomy, Faculty of Agriculture, Cross River State University of Technology, Obubra
Campus,Cross River State, Nigeria.
Abstract: Soil management involves a lot of operation and practice. We studied the influence of different land
management (use) practices; Golf course, (GC), Forest land (FL), Continuous Cropping (CL)) on soil
properties. Soil samples were collected at 0-20cm, 20-40cm and 40-60cm depths from the different land use
systems and analysed for exchangeable bases, total N%, Om%, Available P (ppm), bulk density (bd), total
porosity (tp%) and hydraulic conductivity (hc). Results of the study showed higher values of exchangeable
bases in top 0-20cm compared to the values obtained in 20-40cm and 40-60cm.Similarly, tp% decreased with
depth while bd and hc increased with depth in the different management systems,. Results showed higher mean
values of Om% in FL compared to GC and CL. Results of the study also showed little variability (1%) to
medium variability (48%) in all parameters studied. Continuous cultivation was observed to deplete soil
nutrient which could result to reduced soil productivity.
Keywords: Management Practice, Soil Properties, Soil Productivity and Variability
I.
Introduction
Land use and anthropogenic management practices can influence soil properties. Some management
practices lead to change in soil properties which predispose the soil to erosion. Lal (1982)1 observed that crop
response to tillage practices is dependent on soil, climate and crop. According to Evanylo and McGuin (2000)2
management practices affect soil crusting and compaction, vegetative cover and soil porosity will increase or
decrease the rate of infiltration. Johnson and Wolf (1995)3 reported that in well aerated soil high doses of
agricultural wastes resulted in the formation of large quantities of nitrates which according to Adams (1994) 4 is
not fixed in appreciable quantities by soil and thus could be leached to the ground water. Gysi (2001)5 observed
that soil compaction has become a problem of worldwide concern especially under highly mechanised
agricultural practices where severe structural degradation impedes plant growth. Stockdate et al., (2001)6 and
National Research Council (1989)7 observed that conventional management practices rely on the use of
synthetic fertilizers, herbicides and pesticides for crop production and elimination of weeds and insects.
Research information on the properties of soils under different management or use is vital for proper
management of tropical soils. This work primarily aims at evaluating the effect of different land use or
management on soil properties in a Typic Haplustult in South-Eastern Nigeria. The specific objective of this
work is to determine how the changes in soil properties due to land management system could affect soil
productivity in a tropical Ultisol.
II.
Material and Methods
2.1 Experimental site
The experiment was conducted at the faculty of Agriculture and Natural Research Management Farm
complex, Ebonyi State University, Abakaliki. (060 41N, 080 651E). The area experiences bimodal pattern of
rainfall and has a total annual rainfall varying between 1700 -2000mm. It has a minimum temperature of 270c
and maximum temperature of 310c. The soil is a product of successive deposit from ASU river of crustaceous
age belonging to the order Ultisol (FDALR, 1990)8 and classified as Typic Haplustult.
2.2 Field methods
Soil auger was used to collect samples from different land use systems namely forested land (FL),
continuously cultivated land (CL) and golf site (GS). The samples were collected at the depths of 0-20cm, 2040cm and 40-60cm from each of the land use system. Three soil samples collected from each depth giving a
total of 27 samples. The collected soil samples were air dried at room temperature preparatory for analysis.
Similarly, core soil samples were collected for the determination of bulk density (Bd) and Hydraulic
conductivity (Hc).
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2. Influence Of Different Soil Management Practices On Soil Properties And Its Implication On Soil
2.3 Laboratory analysis
Bulk density was determined using the method described by Blake and Hartge, (1986)9. Total porosity
was calculated from the dry bulk density data as fraction of total volume occupied by soil assuming a particle
density of 2.65mg-3. Total nitrogen was determined by the Macro Kjeldah method (Bremmer, 1965)10. Available
P was determined using Bray II as outlined in Page et al., (1982)11 and Organic Carbon by the Walkey and
Black method (Nelson and Sommers, 1982)12. Soil pH in Kcl was by the glass electrode meter
(Maclean, 1982)13. The exchangeable bases were determined by the method of Association of official Analytical
chemists (AOAC, 1970)14
2.4 Data Analysis
The data collected were analysed using means and Coefficient of Variation (CV). Variability was
ranked as follows. Little variation (CV% < 20%), moderate variation (CV% > 20% and ≤ 50%) and high
variation (CV% > 50%) according to Aweto (1982)14.
Table 1: Effect of different land use on soil bulk, total porosity, hydraulic conductivity
Depth (cm)
FL
Bd
GC
CL
FL
TP%
GC
CL
FL
HC
GC
CL
0-20
20 -40
40 -60
Means
CV%
1.40
1.45
1.45
1.42
9
1.46
1.76
1.77
1.66
2
1.30
1.32
1.35
1.32
6
47
45
45
46
7
54
34
34
38
12
31
50
49
50
10
45.1
40.3
43.8
43.0
4
45.7
40
44.1
46.3
7
49.0
47.3
48.5
48.2
3
FL= Forest Land, GC= Golf course, CL= continuous Cultivated land, Bd = density,
Tp% = total porosity, Hc = hydraulic conductivity.
Table 2: Effect of different land use on soil pH, OM% total N% and Available P (ppm)
pH
Depths (cm)
0-20
% 0M
% TotalN
Available P
FL
GC
CL
FL
GC
CL
FL
GC
CL
5.2
5.9
5.3
6.53
3.99
1.05
0.26
0.13
0.06
FL
GS
CL
4.66
1.87
3.73
1.37
0.93
1.37
3.10
1.47
1.87
20 -40
4.3
5.4
4.1
2.80
2.67
0.73
0.11
0.06
0.05
0.93
40 -60
4.0
5.4
4.2
2.34
1.47
0.47
0.13
0.05
0.05
3.37
Means
CV%
4.5
5.6
10
4.5
4
3.89
10
2.71
42
0.75
33
0.17
27
34
0.07
0.05
2
2.18
48
4
42
12
FL= Forest Land, GC= Golf course, CL= continuous Cultivated land.
Table 3: Effect of different land use on soil exchangeable bases (Cmolkg-1)
Na+
K+
Mg2+
Ca2+
Depths (cm)
FL
GC
CL
FL
GC
CL
FL
GC
CL
FL
GS
CL
0-20
0.29
0.29
0.19
0.10
0.09
0.04
3.8
3.6
1.8
7.0
6.0
1.3
20 -40
0.24
0.25
0.16
0.06
0.08
0.07
1.8
3.4
1.2
3.0
5.0
1.2
40 -60
0.24
0.25
0.15
0.06
0.10
0.04
1.4
3.4
.14
3.2
4.8
1.1
Means
0.05
0.61
0.07
0.09
0.05
2.3
3.5
1.5
4.4
5.3
1.2
CV%
18
10
24
8
24
40
2
23
36
19
1
33
FL= Forest Land, GC= Golf course, CL= continuous Cultivated land.
III.
Results and Discussions
Changes in the exchangeable bases of the different land management systems are shown in TABLE 1.
In each of land use system top 0-20cm depth had highest concentration of exchangeable bases (Ca, Mg, K, Na)
compared to subsoil (20-40cm and 40-60cm). The magnitude of increase in each of the exchangeable bases was
land management dependent. For example at the depth of 0-20cm, observed Ca value was 57% higher than
20-40cm and 54% higher than 40-60cm depth. The order of increase in Mg2+ content at 0-20cm depth was
FL > GC > Cl. Observed values of Na and K also varied with depths in the studied land management systems
with highest values obtained in the top 0-20cm depth. The high levels of exchangeable bases observed at
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3. Influence Of Different Soil Management Practices On Soil Properties And Its Implication On Soil
0-20cm depth relative to other depths could be attributed to higher levels of organic matter. Organic matter
(OM) is reported to contribute to the CEC of soils that are low in clay. (Mbagwu et al., 1991)16. Coefficient of
variation (CV%) in the exchangeable bases ranged between l - 36% indicating little to moderate variation
(Aweto, 1982)15.
The pH of the studied soil ranged between 5.2 - 5.9 in the top 0- 20cm and 4.0 – 5.4 in the subsoil
(20 -40cm, and 40-60cm) in the different land use systems (TABLE 2). These values indicated moderately
acidic value in the top soil and extremely acidic value in the subsoil (USDA – SCS - 1974)17. Russel (1977)18
argues that pH seems not to have a precise significance in agriculture due to various factors which affect the pH
of the soil. However, some generalizations can nevertheless be made for interpretative purpose since crops have
tolerance levels of soil pH and nutrient availability in soils. The table also show highest values of OM% in the
top 0-20cm in all the land use systems. Observed OM% values in top 0-20cm of forest land (FL) was 57%
higher than
20-40cm and 64% higher than 40-60cm depth. Available P was observed to vary in the order
GS > FL > CL in the top 0-20cm depth. Coefficient of variation (CV%) in soil contents of pH, % OM, TN% and
Available P (ppm) ranged between 2% - 48% across the different land management systems indicating little
to moderate variability (Aweto, 1982)15.
Results also shows that the different management techniques studied influenced the soil bulk density at
all the depths (TABLE 3). Dry bulk density decreased in CL management technique by18 % for FL and 33% for
GC at 0- 20cm depths. The order of decrease in soil dry bulk density at the different depths of FL was 0-20cm >
20-40cm = 40-60cm. Indirectly the decrease is a consequence of improved structure as is partly substantiated
by an increase in total porosity.
The table also show decrease in total porosity (Tp) value with decrease in depth in all the studied land
management system. The order of increase in mean values in Tp in the different land management systems was
CL > FL > GC. Observed values of hydraulic conductivity (Hc) ranged from 45.1 – 49 (0-20cm), 40 - 47.3
(20-40cm) and 43.8 - 48.5 (40-60cm) depths. The lower values of dry bd observed in the top 0-20cm could be
attributed to the direct and indirect effects of increased OM levels in the top soil (TABLE 2). The coefficient of
variation in Bd, Tp and Hc ranged from 2-12% indicating little to moderate variation. Alvaro et al., (1998)19
observed that dry bulk density is a soil physical parameter used extensively to quantify soil compactness and has
a very influential effect on root growth and proliferation which are both indicators of soil productivity
Charau and Nicou (1979)20 noted that a 0.1mgm-3 decrease in dry bulk density had a significant beneficial effect
on root development and yield of sorghum and groundnut.
IV.
Conclusion
In conclusion, the average results of the study showed highest mean value of bulk density (bd) and
Lowest mean values of other studied parameters in continuously cultivated lands (CL). This implies that
continuous cultivation depletes soil nutrient which could lead to reduced soil productivity.
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