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AP6165 - $25.70
What are the pH values of the soil in your area? What could cause soil to have a low or high pH level? Students will find answers to these questions and more as they perform this easy-to-follow procedure to find soil pH values! Students use a pH indicator...
AB1143 - $456.95
Students experiment with easy-to-use soil test procedures to determine soil pH, nitrogen, phosphorus and potassium concentrations. Chemicals and materials are provided so each test can be performed 50 times. Each test is separately packaged so several...
P.O. Box 219, Batavia, IL60510



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