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Phosphorus-based variable rate manure application in wheat and barley
Manure is used as a source of nutrients and organic matter for agricultural lands, but its unbalanced use has unfortunately made nitrogen (N) and...
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Management zone classification for variable-rate soil residual herbicide applications
The use of soil residual herbicides, along with other practices that diversify weed management strategies, have been recommended to improve weed...
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Opportunities for variable rate application of nitrogen under spatial water variations in rainfed wheat systems—an economic analysis
In fields of undulating topography, where rainfed crops experience different degrees of water stress caused by spatial water variations, yields vary...
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Within-field spatial variability and potential for profitability of variable rate applications
Since literature is not unanimous about profitability of variable rate application (VRA), a systematic analysis is essential to determine when, where...
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Development of a Multi-Fertilizer Spreader Machine and Variable Rate Controller for Olive Orchards
The objective of this research was to develop a machine to spread three different mineral fertilizers at the same time at a variable rate if...
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Spatiotemporal normalized ratio methodology to evaluate the impact of field-scale variable rate application
Wide assimilation of precision agriculture among farmers is currently dependent on the ability to demonstrate its efficiency at the field-scale. Yet,...
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Variable-Rate Fertilization in a Custard Apple (Annona squamosa L.) Orchard Based On the Spatial Variability of Soil Nutrients
Due to the soil nutrient distribution caused by complex mountain topography, it is difficult to achieve the precise fertilization. This study...
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Evaluation of different crop model-based approaches for variable rate nitrogen fertilization in winter wheat
Several remote sensing-based methods have been developed to apply site-specific nitrogen (N) fertilization in crops. They consider spatial and...
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Spatial Variability of NDVI and SPAD for Variable- and Fixed-Rate Fertilization in Olive Orchards
The aim of this study was to determine the spatial variability of fertilization requirements by using normalized difference vegetation index (NDVI)...
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Phosphorus drawdown rate following cessation of repeated manure application to annual crops
Repeated nitrogen (N)-based manure application to meet crop N requirements could result in phosphorus (P) accumulation to potentially detrimental...
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A spatiotemporal decision support protocol based on thermal imagery for variable rate drip irrigation of a peach orchard
Precision irrigation can affect orchard water status and water productivity (WP). It is hypothesized that crop water status-based irrigation at the...
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Design considerations of variable rate liquid fertilizer applicator for mature oil palm trees
This research study focuses on the design of variable rate liquid fertilizer applicator which can measure the NPK status of soil and applies N, P and...
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Implementing variable-rate herbicide applications based on soil physical properties in grain sorghum
Soil application of herbicides for pre-emergence (PRE) weed control is vital for grain sorghum production. Many soil-applied herbicides can be...
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Using spatially variable nitrogen application and crop responses to evaluate crop nitrogen use efficiency
Low nitrogen use efficiency (NUE) is ubiquitous in agricultural systems, with mounting global scale consequences for both atmospheric aspects of...
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Efficacy of Different Pre and Post Emergence Herbicide Application on Late Sown Maize Crop Under Variable Planting Density
Planting density (PD) is an important management practice that plays a crucial role in crop growth and weeds infestation. Weeds control methods also...
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Free energy and kinetic rate calculation via non-equilibrium molecular simulation: application to biomolecules
Non-equilibrium molecular dynamics (NEMD) simulation has been recognized as a powerful tool for examining biomolecules and provides fruitful insights...
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Variable-rate seeding in soybean according to soil attributes related to grain yield
Defining the ideal soybean stand is essential for obtaining maximum grain yield. As a hypothesis of the work, it was questioned whether it is...
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Correlation of UAV and satellite-derived vegetation indices with cotton physiological parameters and their use as a tool for scheduling variable rate irrigation in cotton
Current irrigation management zones (IMZs) for variable rate irrigation (VRI) systems are static. They are delineated in the beginning of the season...
