Nitrogen fertilizer is an indispensable input to modern agriculture, but it also has been linked to environmental degradation and human health concerns. Recognition of these trade-offs has spurred debate over its use. However, data limitations and misinformation often constrain discussion, cooperative action and the development of solutions. To help inform the dialogue, we (1) evaluate existing data on nitrogen use, (2) estimate typical nitrogen fertilization rates for common crops,(3) analyze historical trends in nitrogen use, (4) compare typical nitrogen use to research-established guidelines and (5) identify cropping systems that have significant influence on the state's nitrogen cycle. We conclude that a comprehensive grower self-monitoring system for nitrogen applications is required to improve nitrogen-use information and to better support evidence-based decision making. The discussion here presents a primer on the debate over nitrogen fertilizer use in California agriculture.
DOI:
https://doi.org/10.3733/ca.E.v067n01p68Altmetric score:
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Publication year
2013
Authors
Rosenstock, T.S.; Liptzin, D.; Six, J.; Tomich, T.P.
Language
English
Keywords
nitrogen fertilizers, environmental degradation, soil fertility, cropping systems, crop growth
Geographic
United States of America
