Evaluation of strategies for precision management of N and P fertilization on rolling landscapes
Through the ages agricultural production systems have benefited from the incorporation of technological advances primarily developed for other industries. The industrial age brought mechanization and synthesized fertilizers, the technological age offered selective herbicides, genetic engineering and now the information age brings the potential for Precision Agriculture. With the advent of tools such as the differential Global Positioning System (dGPS), Geographical Information Systems (GIS), high resolution and hyperspectral remote sensing information and miniaturized computer components, agricultural enterprises can now capable of monitoring and responding to field variation on a fine-scale. This precision agriculture has both an economical and environmental basis. Matching inputs to crop and soil requirements as they vary within a field should improve the efficiency of resource use and minimize adverse environmental impact. The overriding question for producers is whether they will be able to make more money by investing in new technologies. For dryland production of low-value crops, minimizing the costs of precision farming is critical to its profitability. In this study, we developed simple rule for delineating management unit using past yield, soils, topography, and aerial photography and tested the suitability of rule at another site.
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