Precision Agriculture: Water and Nutrient Management

Authored by: Robert J. Lascano , J.D. Booker

Encyclopedia of Environmental Management

Print publication date:  December  2012
Online publication date:  December  2012

Print ISBN: 9781439829271
eBook ISBN: 9781351235860
Adobe ISBN:

10.1081/E-EEM-120046471

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Abstract

Precision agriculture (PA) refers to the practice of managing agronomic inputs according to specific needs across the landscape. The major impediment to implement the adoption of PA is the development of decision-support systems. Research in PA, focusing on factors controlling crop variability, has described useful process relationships, and these results are supporting the development of decision-support systems. An example is the integration of crop simulation models with geographic information data of soil and elevation, real-time weather, and management information systems. Models such as the Precision Agricultural-Landscape Modeling System that can calculate the energy, water, nutrient, and carbon balance across the landscape at a 5 to 10 m resolution provide the desired integration of field-scale data. These landscape-scale models can provide a decision-support framework to manage agronomic inputs to maximize economic crop yield while minimizing environmental hazards. Adoption of PA will continue to increase given the demand for a safe food and fiber supply of high quality.

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