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peer-reviewed research article

Late-season nitrogen may be efficient way to increase winter wheat protein


Bruce A. Linquist, UC Davis
Ken G. Cassman, UC Davis
Allan Fulton, UC Davis
Lee Jackson, UC Davis

publication information

California Agriculture 46(2):13-16. DOI: 10.3733/ca.v046n02p13. March-April 1992.


On-farm experiments were conducted throughout California to study the effect of early- and late-season nitrogen fertilizer applications on grain protein in winter wheat. Results indicate that early-season nitrogen application is inefficient. However, late-season nitrogen (N) applications coupled with irrigation can lead to efficient fertilizer N uptake and partitioning to grain, and increased grain protein. Late-season application was not efficiently recovered in the grain when there was midseason nitrogen application or high native soil nitrogen supply.

author affiliations

B. A. Linquist is Graduate Student, Department of Agronomy and Range Science, UC Davis; K. G. Cassman is Associate Professor, Department of Agronomy and Range Science, UC Davis; A. E. Fulton is Soils and Water Farm Advisor, Kings County, UC Davis. L. F. Jackson is Extension Agronomist, UC Davis.