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Soil test conversion tools
Warning and disclaimer: This program converts soil test results from Brookside Laboratories Inc. (Mehlich-III P, K, Ca, Mg), Spectrum Analytic Inc.
(Mehlich-III P, K, Ca, and Mg and Morgan P, K, Ca, and Mg), A&L Laboratories Inc.
(Mehlich-III P, K, Ca, Mg and Modified Morgan P), and the soil testing laboratories
from the University of New Hampshire (Mehlich-III P, K, Ca and Mg), University of
Massachusetts (Morgan P, K, Ca, and Mg) and the Universities of Vermont and Maine (Modified
Morgan P, K, Ca, Mg) to Cornell University Morgan Equivalents. Phosphorus conversions
from Mehlich-III data require measured values for soil pH, Mehlich-III P, Ca, and Al.
For each test, the range of valid input data is given by a minimum value (min) and a
maximum value (max). Also given are the correlation coefficients (r2) for each of the
conversion models. The larger the (r2), the more reliable the conversion. Models were
derived using New York soils. There is uncertainty involved with each of the
conversions. The user assumes all risk. For questions, contact Q.M. Ketterings
(qmk2@cornell.edu). Equations last updated 8/30/2003.
Choose the soil extraction method:
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