All of the LaMotte soil test kits measure the portion of the soil nutrient that would be available for the plant to use. Since extraction is not complete, the amount that is measured is relative, dependent on the extraction procedure. Pounds per acre represent the number of pounds of soil in an acre to the plow depth of 6-7 inches, or 2,000,000 lbs.
The SCL-12 electronic soil lab is designed to provide the landowner, consultant, or fertilizer specialist with a method for achieving immediate and economical soil analyses in the field without sacrificing accuracy. The SCL-12 soil lab is a self-contained, electronic soil analysis laboratory that provides accurate answers anywhere for fifteen soil factors, including available forms of macronutrients and critical micronutrients.
Specifications
Colorimeter Tests
Method
Range
# of Tests
Nitrate Nitrogen*
Cadmium Reduction
0-150 lbs/acre
20
Nitrite Nitrogen
Diazotization
0-70 lbs/acre
20
Ammonia Nitrogen*
Nesslerization
0-150 lbs/acre
50
Phosphorus*
Ascorbic Acid Reduction
0-98 lbs/acre
50
Potassium*
Tetraphenyl-boron
0-500 lbs/acre
100
Sulfur
Barium Chloride
0-167 ppm
50
Copper
Diethyldi-thiocarbamate
0-30 ppm
100
Iron
Bipyridal
0-30 ppm
50
Manganese
Periodate
0-75 ppm
50
Zinc
Zincon
0-15 ppm
50
Direct Reading Titrator Tests
Calcium
0-4000 lbs/acre
50
Magnesium
0-2400 lbs/acre
50
Chlorides
0-1000 lbs/acre
50
Battery-Powered Meters
pH 5
pH 0-14
TDS 6
0-99.9 ppm; 100-999 ppm; 1.00-9.99 ppt
Unit Conversion Factors
Results can be measured using a choice of units, explained here. Parts per million (ppm), pounds/acre, and Kg/hectare units can be converted to each other using these values:
Area
Soil Depth
Soil Weight
1 acre
6-7 inches
2 mil lbs.
1 hectare
15-18 cm
2.25 mil Kg
ppm
lb/Acre
Kg/Hectare
0.5
1
1.12
1.0
2.0
2.24
0.89
1.78
1
A number of variables must be considered when interpreting soil test results in addition to the values obtained. These variables include the composition of the soil, drainage, climate, previous fertilizer programs, and the type of plant to be grown. Samples must also be truly representative of the area being studied and must be carefully selected.
All of the LaMotte soil test kits measure the portion of the soil nutrient that would be available for the plant to use. Since extraction is not complete, the amount that is measured is relative, dependent on the extraction procedure. Pounds per acre represent the number of pounds of soil in an acre to the plow depth of 6-7 inches, or 2,000,000 lbs.