|Fox, R. - PENN STATE UNIV|
Submitted to: American Society of Agronomy Monograph Series
Publication Type: Book / Chapter
Publication Acceptance Date: December 12, 2002
Publication Date: N/A
Interpretive Summary: Nitrogen management in agriculture is a major concern because of its importance to crop production and because of losses of excess nitrogen leading to surface and ground water contamination. Methods to monitor crop nitrogen status including visual assessment, various forms of chemical analysis of plant elements, portable chlorophyll meters, soil testing and remote sensing have proven useful for improving nitrogen management and thus increasing yield and reducing excess nitrogen loss. A review of these methods indicates that they are becoming more accurate, easier to employ and increasingly more cost effective. The range of options available makes it possible to assess individual plants to entire fields. This review will serve as a primary reference to agriculture students, farmers, crop consultants, researchers and perhaps policy makers.