LaMotte SMART3 Soil Operator's Manual page 112

This test result is the reagent blank. Subtract the reagent blank from all subsequent
test results of unknown samples. It is necessary to determine the reagent blank only
when a new lot number of reagents is obtained.
ZINC
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Zinc Concentration Chart
Parts Per Million Range
0.0-0.5 ppm Low
0.6-1.0 ppm Marginal
1.1-2.0 ppm Adequate
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15
10 20
5 25
0 30
Smart3 Soil Test Procedures 9.18
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