About this book
Using mathematics, technology, and creativity, this volume examines the development of nutrient management practices that help producers improve their profitability and energy efficiency. Throughout the book, chapters demonstrate how complex mathematical and spatial modeling approaches can provide the basis for much of our present and certainly our future management practices.
The book includes an interative CD for readers to work through example GIS applications.
Introduction: scale of the problem, impact of nutrient management on energy efficiency, the relationship between energy efficiency and production efficiency
Calculating energy efficiency
Obtaining critical information
Defining field boundaries
Obtaining digital information, remote sensing, soils, yield monitor data
P index relationship to energy and water quality efficiency
P management zones
Manure impacts on carbon, N, and water budgets
Relationship between water and energy efficiency
Water and nutrient management-irrigation planning
Water and nutrient management for ethanol production
Matching crops, landscape positions, and nutrient management
Landscape planning for improved water use efficiency
Legumes and cover crops
Crop residue harvesting impacts
Relationship between N and energy efficiency
Real-time management vs. mapped management, Remote sensing- Ground-based sensor technology vs. aerial or satellite imagery
Nutrient removal based recommendation.
Delta-yield based N recommend
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.aa