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31 Mar 2016Soil Test Levels in North America

2015 Summary Update

16 Jan 2012On-Farm Research

Want to do some field trials of your own? This tutorial provides guidance on designing experiments and provides step-by-step instructions for conducting a statistical analysis in Microsoft Excel.

16 Jan 2012Finding Trends in Soil Test Data

The following materials are provided to help farmers and crop advisers use Microsoft Excel to examine soil test data over time to assess how a fertilization program changes soil test levels. The manua ...

06 Oct 2009PKalc - Nutrient Budget Estimation Spreadsheet

Note: This material is based upon work supported by the Cooperative State Research, Education, and Extension Service (CSREES), U. S. Department of Agriculture, under agreement No. 00-52103-9679 of the ...