LaMotte Soil Chemistry Test Equipment - Manual (Page 13)

Commercial Fertilizer Mixtures show a three-number formula indicating
percentages of nitrogen, phosphorus, and potash. Use the example below
to select the proper mixture.
Test Results
Nitrogen Phosphorus Potash
Medium Low High
Fertilizer Recommendation
6 lbs 10 lbs 4 lbs
Formula of Fertilizer Mixture 6% 10% 4%
100 lbs of the 6-10-4 mixture contain 6 lbs nitrogen, 10 lbs phosphorus,
and 4 lbs potash. Apply 100 lbs of this mixture per 2000 sq ft (50 lbs per
2000 sq ft for evergreens, shrubs, or berries). Smaller areas require
proportionally smaller applications.
If unable to find a formula that matches the values obtained in the
recommendation table, use a formula with approximately the same
proportions as the recommended values. Always consult manufacturer
recommendations.
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