ID

CSES-90P

Authors as Published

Mark S. Reiter, Associate Professor and Soils and Nutrient Management Extension Specialist, Crop and Soil Environmental Sciences, Eastern Shore Agricultural Research and Extension Center John E. Mason, Research Specialist, Eastern Shore Agricultural Research and Extension Center Wade E. Thomason, Associate Professor and Extension Grains Crop Specialist, Crop and Soil Environmental Sciences, Virginia Tech

cover CSES-90

This publication is available in PDF format only.

Variable-rate applications (VRA) of nitrogen (N) fertilizers are a new option to assist producers with real-time fertilizer rate decisions. Two commercially available systems that allow variable-rate nitrogen applications are GreenSeeker (Trimble Navigation Limited; www.ntechindustries.com/greenseeker-home.html) and the OptRx Crop Sensor (Ag Leader Technology; www.agleader.com/products/directcommand/optrx/). A discussion of the science behind these systems, potential economic benefits, and other methodologies to make VRA is discussed in Virginia Cooperative Extension publication 442-505, “Precision Farming Tools: Variable-Rate Application” (Grisso et al. 2011). 


Virginia Cooperative Extension materials are available for public use, reprint, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University.

Issued in furtherance of Cooperative Extension work, Virginia Polytechnic Institute and State University, Virginia State University, and the U.S. Department of Agriculture cooperating. Edwin J. Jones, Director, Virginia Cooperative Extension, Virginia Tech, Blacksburg; M. Ray McKinnie, Administrator, 1890 Extension Program, Virginia State University, Petersburg.

Publication Date

August 8, 2014