Deficit irrigation of row crops
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This document discusses deficit irrigation techniques for row crops in humid regions. It describes how managed depletion irrigation (MDI) can provide drought mitigation, environmental protection, and optimized crop yields. Small plot studies on soybeans and cotton were conducted to determine optimal MDI levels and timings. A new irrigation scheduling tool called MOIST+ was developed that incorporates recommendations from the yield studies and uses soil matric potential sensors and a water balance model to provide deficit irrigation recommendations. The tool and techniques were demonstrated on producer fields.
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Nowadays, water availability is a major limiting factor for development of agriculture in arid and semiarid areas. Under conditions of scarce water supply and drought, irrigation practices demand the maximum use of every drop of water to maximize water productivity for irrigated crops. A field experiment with a split-plot design was carried out to evaluate the combined effect of three furrow irrigation techniques and three irrigation levels treatments on maize grain yield and water productivity at Mekhoni Agricultural Research center (MeARC), Raya valley district. Irrigation was applied through furrows in three ways as the main plots: conventional furrow irrigation (CFI), alternate furrow irrigation (AFI), and fixed furrow irrigation (FFI). In CFI, irrigation was applied to every furrow at each irrigation event; in AFI irrigation was applied to alternate furrows which were dry in the preceding irrigation cycle, while in FFI, irrigation was applied to fixed furrows throughout the growing season. Each irrigation technique was further divided into three sub-irrigation treatments: two deficit irrigation levels 75% and 50% ETc and a control of 100% ETc as sub-plot were investigated. Results showed that maximum water productivity was obtained under the AFI system without a trade-off in grain yield and considerably save water. Hence, it is recommended as efficient irrigation technique in areas with limited water resources.
Effect of Soil Salinity on Growth of Millet in Lysimeter Experiment
IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS) is a double blind peer reviewed International Journal edited by the International Organization of Scientific Research (IOSR). The journal provides a common forum where all aspects of Agricultural and Veterinary Sciences are presented. The journal invites original papers, review articles, technical reports and short communications containing new insight into any aspect Agricultural and Veterinary Sciences that are not published or not being considered for publication elsewhere.
Water management of wheat
1. The document discusses water management strategies for wheat crops, including determining optimal irrigation times, depths, and methods.
2. Key irrigation times for wheat include crown root initiation, late tillering, late joining, flowering, milk stage, and dough stage. The number of irrigations depends on soil type but generally ranges from 3-8.
3. Other water management techniques discussed include using hydrogel amendments, implementing irrigation strategies based on water availability, adopting micro irrigation systems like sprinklers and drip, and using deficit irrigation and straw mulch to increase wheat yield and quality with less water.
Success in feeding the world or source of social and environmental concern
Success in feeding the world or source of social and environmental concernM S Swaminathan Research Foundation
This document summarizes Peter Carberry's presentation on climate-smart agriculture. Some key points:
- CSA aims to support food security under climate change by implementing flexible, context-specific solutions to changes in rainfall and temperature.
- ICRISAT has developed climate-smart practices like drought-tolerant crop varieties, crop-livestock-tree systems, watershed development for irrigation, conservation agriculture, and using seasonal climate forecasts.
- These practices have helped increase yields, resilience, and incomes of smallholder farmers in India and other countries facing water stress and climate risks. Adoption of short-duration chickpea varieties developed by ICRISAT increased production 5-7 times in Southern India0906 Agricultural Development: What Comes After 'Modern Agriculture'?
0906 Agricultural Development: What Comes After 'Modern Agriculture'?SRI-Rice, Dept. of Global Development, CALS, Cornell University
The document discusses the development and characteristics of modern agriculture in the 20th century and questions whether it should be continued or expanded. It argues that while modern agriculture greatly increased food production, it has stressed natural resources and the environment. The System of Rice Intensification (SRI) is presented as an agroecological alternative that uses different management practices to improve yields while reducing inputs, costs, and environmental impacts compared to modern practices. SRI demonstrates that alternatives exist that are more sustainable and productive than continuing along the current technological path of modern agriculture.Effects of integrated water and nutrient management technologies on crop and ...
1. The study evaluated the effects of different soil and water conservation techniques combined with organic and inorganic fertility management on soil moisture storage, plant growth, and crop yields for smallholder farmers in Zimbabwe.
2. Post-planting tied ridging significantly increased soil moisture storage compared to conventional tillage. Conservation farming basins and rip-and-pot holing performed similarly in storing soil moisture.
3. Combining post-planting tied ridging with organic and inorganic fertilizers led to higher maize and soybean yields compared to other treatments in both the 2009-2010 and 2010-2011 growing seasons.
Sustainable Cotton Production for the Humid South
This document discusses sustainable cotton production practices for the humid South, focusing on ways to improve soil health and profitability over the long term. It recommends using no-till, cover crops, and crop rotations to build soil organic matter, reduce erosion, and break pest cycles while saving costs on fertilizers and pesticides. Cover crops like rye, black oats, and lupines provide "solar fertilizer" by fixing nitrogen in the soil. No-till combined with crop rotation and manure application improves the sustainability of individual farms and farm communities.
Sustainable sugarcane initiative
1. The document summarizes a seminar presentation on the Sustainable Sugarcane Initiative (SSI), an agronomic approach inspired by SRI rice methods that aims to increase sugarcane productivity using fewer resources.
2. Major principles of SSI include raising nurseries with single-budded chips, transplanting young seedlings in zig-zag patterns with wider spacing, precision water management including drip irrigation, reduced chemical fertilizer and pesticide use, and intercropping.
3. Studies show SSI can increase yields to 100-130 tons/hectare, save 40% water usage, and increase profits by 30% compared to conventional methods through greater resource efficiency and healthier soil/
September 1 - 0216 - Jessica D'Ambrosio
This document provides information on edge-of-field conservation practices and a panel discussion on drainage ditches. It summarizes various practices for nutrient, soil, and sediment removal including vegetated buffers, grassed waterways, prairie strips, wetlands, bioreactors, and controlled drainage. Cost effectiveness data is given for each. The key elements of an edge-of-field roadmap are outlined as building the economic case, increasing implementation capacity, and elevating a culture of conservation. A sample conservation planning scenario shows identified sites for practices treating over 9,000 acres of land. The document concludes with information on connecting with The Nature Conservancy's Ohio agriculture programs.
yeild responce charaterstics for brinjal crop
This document summarizes the use of the FAO AquaCrop model to simulate brinjal crop growth and yield under surface irrigation. Key findings include:
1) The AquaCrop model was able to predict potential evapotranspiration and brinjal yield with acceptable accuracy for conditions in Allahabad, India.
2) Surface irrigation provided the highest brinjal yields and is recommended for the region.
3) The AquaCrop model can be used to access brinjal growth and yield without field experiments and generate irrigation schedules.
Clay Pot Sub-Surface Irrigation as Water-Saving Technology
Clay Pot Sub-Surface Irrigation as Water-Saving TechnologySchool Vegetable Gardening - Victory Gardens
This document discusses clay pot subsurface irrigation as a water-saving technology for small-scale farmers. It describes an experiment conducted in Zambia comparing the water usage and crop yields of vegetables grown using clay pot irrigation versus conventional watering can irrigation. The experiment found that clay pot irrigation used less water while maintaining or increasing crop yields. It concluded that clay pot irrigation is a suitable system for small-scale farmers in arid regions as it saves water and labor while maximizing production.Similar to Deficit irrigation of row crops (20)
1912 - Agroecological Management of Soil Systems for Food, Water, Climate Res...
1912 - Agroecological Management of Soil Systems for Food, Water, Climate Res...
Cover crops native pollinator species field borders
Cover crops native pollinator species field borders
Agriculture Irrigation and Precision Technologies - Smuker, Gruber, Massri, T...
Agriculture Irrigation and Precision Technologies - Smuker, Gruber, Massri, T...
Mobilizing greater crop and land potentials: replacing the faltering engine
Mobilizing greater crop and land potentials: replacing the faltering engine
1611 - Agroecological Strategies for Regenerative, Climate-Smart Agriculture ...
1611 - Agroecological Strategies for Regenerative, Climate-Smart Agriculture ...
Maximizing Water Productivity of Maize using Alternate Furrow Irrigation at C...
Maximizing Water Productivity of Maize using Alternate Furrow Irrigation at C...
Effect of Soil Salinity on Growth of Millet in Lysimeter Experiment
Effect of Soil Salinity on Growth of Millet in Lysimeter Experiment
Success in feeding the world or source of social and environmental concern
Success in feeding the world or source of social and environmental concern
0906 Agricultural Development: What Comes After 'Modern Agriculture'?
0906 Agricultural Development: What Comes After 'Modern Agriculture'?
Effects of integrated water and nutrient management technologies on crop and ...
Effects of integrated water and nutrient management technologies on crop and ...
Clay Pot Sub-Surface Irrigation as Water-Saving Technology
Clay Pot Sub-Surface Irrigation as Water-Saving Technology
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September 1 - 0939 - Catherine DeLong.pptx
This document summarizes a presentation about using process models to help build trust and understanding when implementing edge of field conservation practices. It discusses how process models can help various stakeholders like conservation professionals, landowners, cities, and contractors understand the time and resources required. It provides examples of process models created for constructed wetlands, saturated buffers, and bioreactors. The presentation discusses the goals of helping more stakeholders and expanding the models, as well as thanking collaborators on the project.
September 1 - 830 - Chris Hay
This document discusses the challenges of meeting nitrogen reduction goals in the Upper Mississippi River Basin. It notes that meeting the nutrient reduction goals will be a massive effort that requires a mix of practices across Iowa, Minnesota, and Illinois, including wetlands, drainage treatment, and stacked practices. However, there are also many challenges to implementing the necessary practices, including economics, human/social factors, delivery challenges, risk management, climate change, and the need for further research. The document emphasizes that understanding the large scale of the challenge is needed to make progress toward the nutrient reduction goals.
August 31 - 0239 - Yuchuan Fan
The document summarizes a meta-analysis that compared the nitrate removal performance of different substrates used in denitrifying bioreactors. It found that wood media had the highest nitrate removal rate (NRR) and percentage (NRE), followed by mulch media, nutshell-based media, and inorganic media. However, when considering cost-effectiveness, woodchip and corn cob were the most economical natural organic carbon substrates. Overall, the analysis suggests that mulch media is the optimal material for nitrate removal due to its low cost and potential to overcome deficiencies in other media types.
August 31 - 0216 - Babak Dialameh
The document summarizes an investigation into phosphorus transport dynamics in subsurface drainage using high-frequency measurements. Key findings include:
1) TRP concentration had a dynamic pattern that was strongly influenced by drainage discharge levels, highlighting the need for high-resolution sampling.
2) Event flows contributed 78% of the total TRP load despite comprising only 50% of total flow.
3) Flow-proportional sampling strategies provided more accurate TRP load estimates than time-proportional strategies and were more cost-effective. Targeting high flow periods is important for reducing phosphorus loss.
August 31 - 0153 - San Simon
This document summarizes a study that evaluated a procedure for prioritizing maintenance of agricultural drainage ditches. The study measured the critical shear stress of soils using a cohesive strength meter to assess their susceptibility to erosion. Soils with higher root densities and those treated with mixed lime showed higher critical shear stresses, meaning they were less susceptible to erosion. Measurements of pressure on the soil surface during testing were mostly lower than estimates from other studies. The procedure effectively identified the relative erosion resistance of different soils, aiding prioritization of drainage ditch maintenance needs.
August 31 - 0130 - Chuck Brandel
ISG worked with Blue Earth County to digitize and modernize their drainage data. They georeferenced existing plans, digitized drainage features, attributed data to the digitized features, and created a geodatabase to house the updated drainage data. This project consolidated Blue Earth County's drainage records, improved data accuracy, and established a process for ISG and the County to regularly update the drainage data going forward. The updated digital records will benefit Blue Earth County, ISG, other engineering firms, and the public.
September 1 - 1139 - Ainis Lagzdins
This document summarizes the results of Latvia's long-term Agricultural Runoff Monitoring programme, which aims to document nutrient concentrations and losses at different spatial and temporal scales. The monitoring covers groundwater, experimental drainage plots, subsurface drainage fields, small catchments, and small/medium rivers at 23 sites. Results show discharge and nutrient concentration data varying by location, scale of monitoring, and between years with flooding or drought. Nutrient levels differed between the Berze and Mellupite monitoring sites and across groundwater, drainage plots, and catchment scales. The programme provides long-term data on agricultural nonpoint source pollution across Latvia.
September 1 - 1116 - David Whetter
This document summarizes an applied research and demonstration project evaluating soil and water management practices in undulating soils in southwestern Manitoba. The project aims to reduce nitrogen, phosphorus and salt export while improving drought resiliency. Preliminary results show tile drainage is lowering water tables most in lower landscape positions, with soil moisture responding rapidly in drained areas. Tile flow rates increase with decreasing elevation. Water quality measurements also show higher salt concentrations in lower positions. Next steps include water quality treatment analysis, long-term monitoring, modeling, knowledge transfer and reporting.
September 1 - 1053 - Matt Helmers
This document summarizes a coordinated research network studying the impacts of 4R nutrient stewardship practices on crop yields, soil health, and nutrient losses across sites in North America. The network included 8 research sites across 6 states/provinces from 2017-2020. Treatments included different fertilizer application timings, placements, sources, and rates. Standardized data collection allowed comparisons across sites. Preliminary findings showed 4R and advanced 4R practices improved nutrient use efficiency and reduced nitrogen losses while maintaining crop yields. Nitrous oxide emissions and nitrate leaching losses decreased under improved nutrient management, though impacts varied between sites and years. Ongoing research aims to further quantify environmental benefits and optimize fertilizer practices.
September 1 - 1030 - Chandra Madramootoo
The document summarizes research on managing drainage water in the Holland Marsh region of Ontario to improve water quality and agricultural productivity. Key points:
- The Holland Marsh is an important vegetable growing region on organic soils, but drainage into Lake Simcoe contributes excess nutrients.
- A study evaluated controlling water tables with controlled drainage to reduce pumping and nutrient loads in drainage water. Modeling and monitoring found it effective for water conservation but more limited for nutrient reductions.
- Soil phosphorus pools, particularly aluminum and iron-bound phosphorus, were found to influence phosphorus levels in drainage water more than drainage management alone. Fertilizer applications exceeded crop needs, accumulating legacy phosphorus in soils over time.
August 31 - 1139 - Mitchell Watkins
This document summarizes a study comparing the effects of conventional ditch drainage (FD) and shallow furrow drainage with tile (SD) on crop yields and water quality in eastern North Carolina. Preliminary results found that SD led to a 68% reduction in drainage volume, 80% less nitrate export, and higher average soybean (+9.1%) and corn (+3.7%) yields compared to FD. SD also requires less land area than FD, has lower maintenance needs, and shows potential to improve water quality and agricultural productivity with more efficient drainage management. The research aims to further quantify these impacts of SD drainage design.
August 31 - 1116 - Shiv Prasher
1) DRAINMOD simulations were conducted for a field in Harrow, Ontario with an asymmetrical drainage system to determine the best approach to simulate drain outflow. 2) Four approaches using different drain spacings were tested: 3.8m, 5.06m, 7.6m, and 15.2m. 3) The mean absolute error and root mean square error for each approach were acceptable, indicating drain spacing had little impact on outflow simulation, though it did impact soil moisture parameters.
August 31 - 1053 - Ehsan Ghane
This document discusses how the choice of pipe material influences drain spacing and system cost. It finds that pipe with more rows of perforations, such as an 8-row regular perforated pipe, has a higher effective radius than a 4-row pipe, allowing for wider drain spacing. Experiments show that a sock-wrapped pipe has the highest drain inflow of the pipes tested, both with and without drain sedimentation present. The key takeaways are that the number of perforation rows and slot length most impact effective radius and drain flow, and a sock-wrapped pipe performs best in terms of drain inflow and spacing.
August 31 - 1030 - Joseph A. Bubcanec
This document summarizes research conducted by the Plastics Pipe Institute (PPI) on the installation of corrugated high-density polyethylene (HDPE) and polypropylene (PP) agricultural drainage pipe. It describes field testing of 30-inch HDPE dual-wall pipe installed at a test site in Ohio, including instrumentation to monitor strain and deflection. Finite element modeling was also used to analyze trench configurations. The research aims to update industry guidance documents to optimize pipe installation practices and trench designs. PPI members also work to increase the use of recycled HDPE and PP materials in pipe production.
September 1 - 130 - McBride
The document discusses Ohio's H2Ohio water quality initiative and its funding of conservation practices including two-stage ditches. It launched in 2019 with $172 million to reduce phosphorus runoff from farms using best management practices like wetlands, buffers, and two-stage ditches. A $5 million grant program was announced to fund two-stage ditch projects based on design guidelines. The document provides details on the grant application process, design requirements using regional curves, and goals to fund 20 projects for 30 miles of ditches at $30 per foot on average.
September 1 - 0153 - Mike Pniewski
This document discusses the implementation and maintenance of two-stage ditches. Two-stage ditches incorporate a floodplain area to increase flow capacity while slowing velocities. They allow for channel vegetation, improve sediment settling, and provide water quality benefits. Challenges include obtaining land access, communication with landowners, permitting, and planting/erosion control. Case studies of implemented two-stage ditch projects in Lucas County demonstrate post-construction conditions and results, including improved drainage and yields for agriculture.
September 1 - 0130 - Johnathan Witter
This document summarizes research on conservation channel design and sediment capture in two-stage ditches. It finds that self-forming channels accumulated more sediment, carbon, nitrogen, and phosphorus over time compared to traditional ditches. Sediment analysis showed higher nutrient levels than surrounding soils. A case study site captured over 500 kg of phosphorus over 9 years that could be harvested and reused as fertilizer, offsetting nutrient costs for farmers. The document concludes sediment trapping in two-stage ditches can improve water quality while providing a locally sourced, cost-effective fertilizer resource.
August 31 - 1139 - Melisa Luymes
Farmers, drainage contractors, researchers, and conservation authorities collaborated on a drainage innovation project at Huronview in Clinton, Ontario. They worked together on the design, installation, and monitoring of new drainage practices to improve water quality and sustainability while maintaining agricultural productivity. A demonstration day was held in June 2019 to share results with stakeholders. The project aimed to foster cooperation across sectors and balance priorities around drainage, research, environmental protection, and social acceptance.
August 31 - 1116 - Hassam Moursi
This document summarizes a study on the impact of drainage water recycling (DWR) on nutrient and sediment losses from agricultural fields in eastern North Carolina. The study found that storing drainage water in an on-farm reservoir for supplemental irrigation (DWR) significantly reduced nitrogen, phosphorus, and sediment concentrations and loads compared to a non-irrigated control field. Specifically, DWR reduced total nitrogen concentration by 40% and load by 47%. It also reduced total phosphorus concentration by 21% and load by 30%. Sediment concentration was reduced by 86% and load by 87%. The hydraulic retention time in the reservoir was found to be the major factor influencing nutrient and sediment removal efficiency.
August 31 - 1053 - Xinhua Jia
This document summarizes Dr. Xinhua Jia's experience incorporating hybrid drainage and wetland design projects into an engineering course at North Dakota State University over several years. Students worked in groups on real-world located projects with simplified objectives. This allowed hands-on design experience without intensive data collection. Projects followed clear milestones like brainstorming, meetings, reviews, and a final report. Feedback was positive, though some students struggled without design backgrounds. Moving forward, encouraging more student-led projects and examples, with close communication, may further strengthen the learning experience.
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Microbial characterisation and identification, and potability of River Kuywa ...
Microbial characterisation and identification, and potability of River Kuywa ...Open Access Research Paper
Water contamination is one of the major causes of water borne diseases worldwide. In Kenya, approximately 43% of people lack access to potable water due to human contamination. River Kuywa water is currently experiencing contamination due to human activities. Its water is widely used for domestic, agricultural, industrial and recreational purposes. This study aimed at characterizing bacteria and fungi in river Kuywa water. Water samples were randomly collected from four sites of the river: site A (Matisi), site B (Ngwelo), site C (Nzoia water pump) and site D (Chalicha), during the dry season (January-March 2018) and wet season (April-July 2018) and were transported to Maseno University Microbiology and plant pathology laboratory for analysis. The characterization and identification of bacteria and fungi were carried out using standard microbiological techniques. Nine bacterial genera and three fungi were identified from Kuywa river water. Clostridium spp., Staphylococcus spp., Enterobacter spp., Streptococcus spp., E. coli, Klebsiella spp., Shigella spp., Proteus spp. and Salmonella spp. Fungi were Fusarium oxysporum, Aspergillus flavus complex and Penicillium species. Wet season recorded highest bacterial and fungal counts (6.61-7.66 and 3.83-6.75cfu/ml) respectively. The results indicated that the river Kuywa water is polluted and therefore unsafe for human consumption before treatment. It is therefore recommended that the communities to ensure that they boil water especially for drinking.
一比一原版(UMTC毕业证书)明尼苏达大学双城分校毕业证如何办理
原件一模一样【微信：6496090】【(UMTC毕业证书)明尼苏达大学双城分校毕业证成绩单学位证】【微信：6496090】（留信学历认证永久存档查询）采用学校原版纸张、特殊工艺完全按照原版一比一制作（包括：隐形水印，阴影底纹，钢印LOGO烫金烫银，LOGO烫金烫银复合重叠，文字图案浮雕，激光镭射，紫外荧光，温感，复印防伪）行业标杆！精益求精，诚心合作，真诚制作！多年品质 ,按需精细制作，24小时接单,全套进口原装设备，十五年致力于帮助留学生解决难题，业务范围有加拿大、英国、澳洲、韩国、美国、新加坡，新西兰等学历材料，包您满意。
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Promoting Multilateral Cooperation for Sustainable Peatland management
Presented by Agus Julianto on GLF Peatlands 2024 - 360 Degree Approach to Improving Capacity of Multiple Stakeholders to Manage Peatland Sustainably
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2:同时对留学生所学专业登记给予评定
3:国家专业人才认证中心颁发入库证书
4:这个认证书并且可以归档倒地方
5:凡事获得留信网入网的信息将会逐步更新到个人身份内，将在公安局网内查询个人身份证信息后，同步读取人才网入库信息
6:个人职称评审加20分
7:个人信誉贷款加10分
8:在国家人才网主办的国家网络招聘大会中纳入资料，供国家高端企业选择人才
Global Peatlands Map and Hotspot Explanation Atlas
Presented by Alexandra Barthelmes at GLF Peatlands 2024 - The Global Peatlands Assessment: Mapping, Policy, and Action
Epcon is One of the World's leading Manufacturing Companies.
Epcon is One of the World's leading Manufacturing Companies. With over 4000 installations worldwide, EPCON has been pioneering new techniques since 1977 that have become industry standards now. Founded in 1977, Epcon has grown from a one-man operation to a global leader in developing and manufacturing innovative air pollution control technology and industrial heating equipment.
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This presentation is for us to know that how our Environment need Attention for protection of our natural resources which are depleted day by day that's why we need to take time and shift our attention to renewable energy sources instead of non-renewable sources which are better and Eco-friendly for our environment. these renewable energy sources are so helpful for our planet and for every living organism which depends on environment.
Climate Change All over the World .pptx
Climate change refers to significant and lasting changes in the average weather patterns over periods ranging from decades to millions of years. It encompasses both global warming driven by human emissions of greenhouse gases and the resulting large-scale shifts in weather patterns. While climate change is a natural phenomenon, human activities, particularly since the Industrial Revolution, have accelerated its pace and intensity
Peatland Management in Indonesia, Science to Policy and Knowledge Education
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Presented by Feri Johana at GLF Peatlands 2024 - 360 Degree Approach to Improving Capacity of Multiple Stakeholders to Manage Peatland SustainablyKinetic studies on malachite green dye adsorption from aqueous solutions by A...
Kinetic studies on malachite green dye adsorption from aqueous solutions by A...Open Access Research Paper
Water polluted by dyestuffs compounds is a global threat to health and the environment; accordingly, we prepared a green novel sorbent chemical and Physical system from an algae, chitosan and chitosan nanoparticle and impregnated with algae with chitosan nanocomposite for the sorption of Malachite green dye from water. The algae with chitosan nanocomposite by a simple method and used as a recyclable and effective adsorbent for the removal of malachite green dye from aqueous solutions. Algae, chitosan, chitosan nanoparticle and algae with chitosan nanocomposite were characterized using different physicochemical methods. The functional groups and chemical compounds found in algae, chitosan, chitosan algae, chitosan nanoparticle, and chitosan nanoparticle with algae were identified using FTIR, SEM, and TGADTA/DTG techniques. The optimal adsorption conditions, different dosages, pH and Temperature the amount of algae with chitosan nanocomposite were determined. At optimized conditions and the batch equilibrium studies more than 99% of the dye was removed. The adsorption process data matched well kinetics showed that the reaction order for dye varied with pseudo-first order and pseudo-second order. Furthermore, the maximum adsorption capacity of the algae with chitosan nanocomposite toward malachite green dye reached as high as 15.5mg/g, respectively. Finally, multiple times reusing of algae with chitosan nanocomposite and removing dye from a real wastewater has made it a promising and attractive option for further practical applications.
Optimizing Post Remediation Groundwater Performance with Enhanced Microbiolog...
Results of geophysics and pneumatic injection pilot tests during 2003 – 2007 yielded significant positive results for injection delivery design and contaminant mass treatment, resulting in permanent shut-down of an existing groundwater Pump & Treat system.
Accessible source areas were subsequently removed (2011) by soil excavation and treated with the placement of Emulsified Vegetable Oil EVO and zero-valent iron ZVI to accelerate treatment of impacted groundwater in overburden and weathered fractured bedrock. Post pilot test and post remediation groundwater monitoring has included analyses of CVOCs, organic fatty acids, dissolved gases and QuantArray® -Chlor to quantify key microorganisms (e.g., Dehalococcoides, Dehalobacter, etc.) and functional genes (e.g., vinyl chloride reductase, methane monooxygenase, etc.) to assess potential for reductive dechlorination and aerobic cometabolism of CVOCs.
In 2022, the first commercial application of MetaArray™ was performed at the site. MetaArray™ utilizes statistical analysis, such as principal component analysis and multivariate analysis to provide evidence that reductive dechlorination is active or even that it is slowing. This creates actionable data allowing users to save money by making important site management decisions earlier.
The results of the MetaArray™ analysis’ support vector machine (SVM) identified groundwater monitoring wells with a 80% confidence that were characterized as either Limited for Reductive Decholorination or had a High Reductive Reduction Dechlorination potential. The results of MetaArray™ will be used to further optimize the site’s post remediation monitoring program for monitored natural attenuation.
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Deficit irrigation of row crops
- 1. Deficit Irrigation of Row Crops Provides Drought Mitigation, Environmental Protection, and Optimized Yield in Humid Regions Dr. Brian Leib, Extension Irrigation Specialist Tim Grant, Irrigation Extension Assistant Biosystems Engineering & Soil Science, University of Tennessee USDA-NRCS Conservation Innovation Grant Showcase at the 73rd Annual Conference of the Soil and Water Conservation Society Albuquerque, NM -- July 29 to August 1, 2018 Also supported by Cotton Inc., Tennessee Soybean Promotion Board, and the Southern Soybean Research Project
- 2. “Deficit”, “Reasonable Depletion” or “Managed Depletion” Irrigation to Optimize Center Pivot Irrigation in a Humid Region • Deficit vs. full irrigation …… (rainfall + irrigation) < crop water use • Better conditions for rainfall capture • Prevent excess soil water where there is potential for poor drainage • Less water on canopy • Promote reproductive instead of vegetative growth -300 -250 -200 -150 -100 -50 0 7/2 7/12 7/22 8/1 8/11 8/21 8/31 SoilMatricPotential(kPa) ~Full 6" 18" -300 -250 -200 -150 -100 -50 0 7/2 7/12 7/22 8/1 8/11 8/21 8/31SoilMatricPotential(kPa) Deficit 6" 18"
- 3. • Develop an Irrigation Scheduling Tool based on the needs of a Humid Region. • Help Interpret Results from a New Type of Soil Matric Potential Sensor. • Incorporate Recommendations from Yield Studies Designed to Identify MDI Levels. • Use a Water Balance and Soil Sensor Approach Simultaneously. • Automate Inputs to the Water Balance by Connecting a Rain Gauge to the Data Logger. • Record Irrigation Amount and Water Management Practices to Validate Cost-Share Programs and Measure Withdrawal from Water Sources. METER Logging System with MPS-2 Sensor MOIST+ (Management Of Irrigation Plus Soil Tension) Why Develop a New Irrigation Scheduling Tool?
- 4. Matric Potential Sensors Compared in a Pressure Plate Experiment -300 -250 -200 -150 -100 -50 0 -300-250-200-150-100-500 Sensor(kpa) Pressure Plate (kpa) Comparison of Matric Potential Sensors (full range) Silt-WM Silt-MPS2 Silt-MPS6 Sand-WM Sand-MPS2 Sand-MPS6 1 to 1 WaterMark MPS-2 & MPS-6
- 5. Soybean Small Plot Trials to Determine Managed Depletion Irrigation (MDI) Levels
- 6. Soybean Yield Results from MDI Trials
- 7. -500 -400 -300 -200 -100 0 11-Jun 3-Jul 25-Jul 16-Aug 7-Sep SoilMoisture R5 1.0"/wk 102 6" 102 18" -500 -400 -300 -200 -100 0 11-Jun 3-Jul 25-Jul 16-Aug 7-Sep SoilMoisture R1 1.5"/wk 107 6" 107 18" -500 -400 -300 -200 -100 0 11-Jun 3-Jul 25-Jul 16-Aug 7-Sep SoilMoisture R3 1.0"/wk 103 6" 103 18" -500 -400 -300 -200 -100 0 11-Jun 3-Jul 25-Jul 16-Aug 7-Sep SoilMoisture Dryland 108 6" 108 18" Soil Matric Potential Results from the 2016 MDI Trials in Soybean
- 8. Cotton Small Plot Trials in Variable Soils to Determine Managed Depletion Irrigation (MDI) Levels
- 9. Cotton Yield Results from MDI Trials Sandy Silt Loam over Sand Deep Silt Loam Rainfed Yield (lbs/ac) Deficit Irrigated Yield (lbs/ac) Optimal Treatment (Stage, Rate) Irrigation Applied (in) Rainfed Yield (lbs/ac) Deficit Irrigated Yield (lbs/ac) Optimal Treatment (Stage, Rate) Irrigation Applied (in) Rainfed Yield (lbs/ac) Deficit Irrigated Yield (lbs/ac) Optimal Treatment (Stage, Rate) Irrigation Applied (in) 2010 (wet) 519 1062 Bloom 1.5 7.2 789 1447 Bloom 0.5 2.4 1336 1336 Rainfed 0 2011 (late dry) 405 1486 Square 1.5 8.2 900 1374 Bloom 0.5 2.2 1385 1668 Bloom 0.5 2.2 2012 (early dry) 425 1374 Square 1.5 8.5 872 1615 Square 1.0 5.7 1108 1522 Square 1.0 5.7 2013 (wet) 1028 1744 Bloom 1.5 3.6 1242 1836 Bloom 1.5 3.6 1705 1705 Rainfed 0 2014 (wet) 149 1464 Sq 0.5, Bl 1.5 6.3 1219 1396 Bloom 1.0 3.8 1452 1452 Rainfed 0 AVERAGE 505 1426 6.8 1004 1534 3.5 1397 1537 1.6
- 10. Cotton Small Plot MDI Trials Effect of soil and irrigation on N uptake
- 11. MOIST+ Spreadsheet with Meter Group (Decagon) Equipment Demonstrated in Producer Fields Rainfall & Irrigation Temperature & Humidity Soil Matric Potential Solar Radiation Logger to Cell Phone to Internet
- 12. Examples of the MOIST+ Spreadsheet
- 13. Cross Platform MOIST+ APP is being developed with MDI Recommendations Incorporated Farm: B.E. Smith Field: Back 40 Zone: Side Slope Crop: Soybean Variety: AP 6111 Growth Stage: R5 1 2 3 YTD ET 0.18 0.20 0.17 12.0 Rain 1.0 0.0 0.0 8.0 Irrig 0.0 0.0 0.5 2.0 Days Past SoilTension SeasonGraph Button WaterBalance SeasonGraph Button Date: 07/28/2018 Logger: 07/28/2018 RootGrowth 1. Record of Irrigation Water Management for Cost-Share Validation. 2. Measured record of Irrigation for Management of Water Resources. 3. How should Irrigation Management Tools be adapted to better serve other regions?