While site-specific soil sampling can improve field management, it must be accompanied by the conscientious collection and analysis of data. The new technologies that have elevated precision agriculture into the forefront of farm management cannot offset poor data collection and soil-testing techniques. Inaccurate data on soil properties will inevitably lead to improper management decisions. This bulletin addresses three primary factors that can affect the precision management of soil fertility: 1) collecting proper soil-sample cores and the consequences of improper soil sampling, 2) breaking the field into smaller management areas, and 3) differences in test results and recommended application rates between soil-test laboratories. A step-by-step procedure is then presented on how to use variabl e yield goals to develop field maps showing variable application rates o f fertilizers and lime.

Status and Revision History
Published on Jan 01, 2002
Published on Feb 20, 2009
Published on May 14, 2009
Unpublished/Removed on Mar 01, 2015
Published with Minor Revisions on Mar 12, 2016

Glen C. Rains Professor, Entomology Calvin D. Perry Public Service Assistant, C.M. Stripling Irrigation Research Park Wesley Porter Assistant Professor, Crop & Soil Sciences
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