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 8 of 8 for “"Fertilizer recommendation"”.
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User-centered design of a fertilizer recommendation system for smallholder farmers
… for feeding a burgeoning population. Imbalanced fertilizer use, a negative consequence of the Green Revolution, is one of the primary causes of soil degradation and adversely impacts the environment, human health, and farm profitability. The problem can be addressed by adopting the principles of …
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Testing two existing fertilizer recommendation algorithms: Stanford's 1.2 rule for corn and site-specific nutrient management for irrigated rice
U of I Only Restriction Lifted for Item 49800 on 2016-09-22T20:59:24Z.
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Developing DRIS norms for Fraser fir Christmas trees
… a scientifically-based nutrient diagnosis and fertilizer recommendation system is needed. The objective of this study was to develop and test DRIS norms for Fraser fir Christmas trees grown in Virginia for the ultimate purpose of establishing a nutrition diagnosis and fertilizer prescription …
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Fate and Utilization of Fertilizer in Inbred and Hybrid Corn Production
… impact of N rate and crop rotation on uptake of fertilizer N in seed corn production, corn inbred lines were grown in corn-corn and corn-soybean (Glycine max L. Merr.) rotations using N application rates of 0 to 144 lb acre$\sp{-1}$. When corn was the previous crop, seed yield of all increased …
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Screen-printed ion selective electrodes for soil ion detection
… 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 performed a soil test. This thesis details the design and …
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Evaluating diagnostic tools for phosphorus and sulfur management in corn
… Field experiments involved varying phosphorus fertilizer rates of 34, 67, 101, and 135 kg P₂O₅ ha⁻¹, plus a control. At the V6 stage, whole plant tissue samples and normalized difference vegetative index (NDVI) readings were collected. At the R1 stage, ear leaf samples and soil plant analysis …
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Three Essays in Development Economics
In spite of tremendous progress in income generation, school enrollment, and agricultural production, developing economies face significant challenges to enhance welfare for their populaces. Although international migration has increased income, there are unknown effects of migration that may have …
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Assessment of Spectral Reflectance as Part of a Variable-Rate Nitrogen Management Strategy for Corn
… has been used to adjust in-season nitrogen (N) fertilizer rates for wheat to account for spatial variability in grain yield potential at a sub-meter resolution. The objective of this study was to examine the relationships among spectral reflectance indices, corn tissue N content, chlorophyll …