Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Soil testing"”.
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Tool Carousel to Support Agricultural Rover Soil Testing
… the tool carousel will be fit for field testing.
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Soil testing and plant analysis to optimize nitrogen management in manured cornfields
… to improve the efficiency of this recycling. Soil testing and plant analysis are widely accepted as important tools for managing plant nutrients, but guidelines for manure management seldom employ these tools. The objective of this study was to develop guidelines for use of soil testing and …
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User-centered design of a fertilizer recommendation system for smallholder farmers
Declining soil health is a major problem in India, affecting nearly 120 million hectares of land constituting 37% of the total geographic area. Soil degradation poses a significant threat to India's food security, due to its negative impact on long-term crop yields, which are crucial for feeding a …
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Incentivizing Sustainable Agriculture in Indonesia: Empirical Essays on the Role of Social Norms and Information Provision
… overapplication, which led to declining soil health and long-term sustainability concerns. Recognizing these challenges, the United Nations’ Sustainable Development Goals (SDGs) placed significant emphasis on sustainable agriculture, particularly through SDG - 2, which seeks to end hunger …
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Diffusive gradients in thin films (DGT) as a technique to predict nutrient availability to plants
The soils of Australia have extensive macro and micronutrient disorders varying greatly in their capacities to provide the chemical nutrients essential for plant growth. Assessment of nutrient availability in soils is important in order to maximise fertilizer efficiency and crop yields and to …
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Nematode Community Structure and Indicators of Biologically-Based Fertility: Influence of Management During Transition to Certified Organic Production
… the influence of management on indicators of soil quality and nematode community structure in systems transitioning from conventional to organic production. The goal was to improve soil assessment and ultimately performance of organic production systems. Soil samples were collected from a …
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Point-of-use soil diagnostics : an actionable information system for resource constrained farmers
… policies and schemes such as the National Soil Health Card Scheme to increase knowledge of soil condition and curb fertilizer use. In reality, however, the current need for information on soil health far exceeds the capacity for soil testing, highlighting the need for a radical approach to …
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The Economic Impacts of Soil Remediation Efforts at Lead Arsenate Contaminated Sites in Yakima County: A Hedonic Approach
… risk to the residents of Yakima, Washington. Soil testing for contaminants resulted in the Department of Ecology funding the remediation of 6 elementary schools in Yakima, Washington where unsafe levels of lead and arsenic were found in the topsoil. This study will evaluate the impact that …
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The diffusion of no-till corn information and adoption in selected counties in Virginia
… agent at least once a year. Use of the state soil testing laboratory was high, as was use of branch experiment stations as information sources.
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Characterization of Soft Clay and Clay-tire Interaction for the Prediction of Ground Mobility
Predicting tire performance on soft, fine-grained soils is required for many off-road explorations in the military, mining, agricultural, and earth-moving sectors. However, the mobility in deformable material is extremely challenging, especially in the presence of water. Although there is a …
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Nondestructive investigation of soil moisture level using optical system
Soils are one of the essential resources consisting of unconsolidated mineral or organic material on the surface of the Earth; it plays an important role in the growth of land plants. Soil testing is an effort to assess the soil constituents and moisture level; this information is useful to …
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Management impacts on GHG emissions and yield for an organic soybean crop
… soybean can be profitable and also improve soil ecosystem services through sustainable agronomic practices. However, because most chemical inputs are restricted from organic agriculture, producers rely heavily on tillage for weed control, which in turn can be detrimental to soil health. The …
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Screen-printed ion selective electrodes for soil ion detection
… usable, and actionable means to diagnose soil health, which is a prerequisite for judicious application of fertilizer. Although government labs and mobile kits are available, these fail to meet the aforementioned qualities; as a result fewer than 5% of rural Indian farmers have ever …
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Temporal Nutrient Dynamics in Cool-Season Pasture
… little research has attempted to document how soil and herbage nutrient concentrations change through time. This thesis summarizes two studies conducted within the context of a larger grazing systems project near Steele's Tavern, VA. The objectives were to: (1) examine temporal changes in plant …
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Technological Innovations for Mid-Atlantic Cropping Systems
… provide greater spatial resolution compared to soil testing, as well as represent plant available nutrients as opposed to chemically extracted nutrient estimations. Plant response exhibited a quadratic relationship with media P concentration in the range of fertilizer decision making for maize, …
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Predicting Maize Yield, Nutrient Concentration and Uptake in P and K Fertilized Soils: Pressurized Hot Water and Other Alternatives to Mehlich I Extraction in Guatemala Soils
The inaccessibility and cost of soil testing reduce effectiveness of fertilizer use on small-scale subsistence farms, and inadequate funding promotes adoption of soil tests in developing countries with minimal validation. For example, Mehlich-I extraction of phosphorus (P) currently used …
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Mitigating the impacts of arsenic on human health and rice yield in Bangladesh
… wells in response to area-wide well testing. Following well testing and education in Araihazar, arsenic exposure declined and remained lowered for at least eight years. Participants with arsenic-unsafe wells were 6.8 times more likely to switch wells over the first two years and …
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In-Situ Geotechnical Characterization of Soft Estuarine Surficial Sediments Using a Portable Free Fall Penetrometer
Knowledge of geotechnical soil properties in the upper meter of the seabed is important for challenges such as scour around submerged structures, management of unexploded ordnances, and generally issues associated with active sediment transport and deposition. Portable free fall penetrometers have …
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Deformation prediction of geosynthetic reinforced soil retaining walls
… the behavior of geosynthetic reinforced soil and the deformation of geosynthetic reinforced soil retaining walls is presented. This investigation included laboratory testing of geosynthetic reinforcements and geosynthetic reinforced cohesionless soils, and finite element analysis of …
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