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Informationen zum Autor David Clay is professor of Plant Science at South Dakota State University. His research program aims to develop and test sustainable agricultural management systems that enhance environmental quality and maintain rural economies and self sufficiency. John Shanahan is an Agronomy Research Manager with Pioneer Hi-Bred International of Johnston! Iowa. He is responsible for developing and disseminating agronomic recommendations that enable farmers to maximize economic returns while improving nutrient and water use efficiency in crop production.?? Klappentext Analyzing the impact of different nutrient management scenarios on energy efficiency! this reference offers powerful techniques to help farmers produce greater abundance at lower costs. Sections cover manure management; water and nutrient management in relation to energy efficiency and ethanol production; matching crops! landscape positions! and nutrient management; and nitrogen and energy efficiency. The book includes a broad range of GIS techniques useful over a range of spatial and temporal scales. An interactive CD is provided to help readers work through examples and data. Zusammenfassung Analyzing the impact of different nutrient management scenarios on energy efficiency, this reference offers powerful techniques to help farmers produce greater abundance at lower costs. Sections cover manure management; water and nutrient management in relation to energy efficiency and ethanol production; matching crops, landscape positions, and Inhaltsverzeichnis Introduction: scale of the problem! impact of nutrient management on energy efficiency! the relationship between energy efficiency and production efficiencyCalculating energy efficiencyObtaining critical informationDefining field boundariesObtaining digital information! remote sensing! soils! yield monitor dataManure managementP index relationship to energy and water quality efficiencyP management zonesManure impacts on carbon! N! and water budgetsWater managementRelationship between water and energy efficiencyWater and nutrient management-irrigation planningWater and nutrient management for ethanol productionMatching crops! landscape positions! and nutrient managementLandscape planning for improved water use efficiencyLegumes and cover cropsCrop residue harvesting impactsNitrogenRelationship between N and energy efficiencyReal-time management vs. mapped management! Remote sensing- Ground-based sensor technology vs. aerial or satellite imageryModel-based recommendationsNutrient removal based recommendation.Delta-yield based N recommend ...
