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Article
Interpreting P and K soil test results
Integrated Crop Management News
  • John E. Sawyer, Iowa State University
  • Antonio P. Mallarino, Iowa State University
Document Type
Article
Publication Date
1-18-1999
Abstract
Soil testing is a key component for determining the need for phosphorus (P) and potassium (K) fertilization. Also, if fertilization is required, test results guide the rate of application recommended to optimize production. Through extensive field research, specific soil tests are calibrated against the expectation of response to applied P and K; that is, they provide both a relative index of the availability of P and K to the crop being grown and an indication of the magnitude of yield increase one might expect when nutrients are applied, thus providing the interpretation of text results.
Copyright Owner
Iowa State University
Language
en
File Format
application/pdf
Citation Information
John E. Sawyer and Antonio P. Mallarino. "Interpreting P and K soil test results" (1999)
Available at: http://works.bepress.com/john-sawyer/124/