Quickly diagnose soil nutrient issues in the field and save time transporting samples back for analysis. Visual color matching system delivers accurate results. LaMotte STH-7 Soil Macronutrient Test Kit comes in a lightweight carrying case with components securely mounted in removable foam trays. Includes complete instructions, a soil management handbook and pad of soil analysis report forms. LaMotte Macronutrient Test Kit includes 100 pH tests from 3.8 to 9.6; 50 nitrate nitrogen tests, 10 to 150 lb./acre; 50 phosphorus tests, 100 to 400 lb./acre; 50 potassium tests, 100 to 400 lb./acre; 50 humus (organic matter) tests, L-H 1.5 to 8%; 50 calcium tests, 150 to 2800 ppm; and 50 magnesium tests, L-H 5 to 150 ppm.