LaMotte SMART3 Soil Operator's Manual page 104

PHOSPHATE
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Phosphorus Concentration Chart
Pounds Per Acre Range
0-14 lb/acre Very Low
16-34 lb/acre Low
35-67 lb/acre Medium
Over 70 lb/acre High
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15
10 20
5 25
0 30
Smart3 Soil Test Procedures 9.18
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