The Topsoil Tour

Product Code: 5425-01/R-5425-01 (Reagent Refill)
The Topsoil Tour is an investigation into the physical and chemical properties of soil. Each student on the Topsoil Tour completes seven units while conducting his/her own soil tests for soil texture, pH, nitrogen, phosphorus, and potassium using safe, simple TesTabsĀ® reagent tablets. Tablets and sample test bags for 50 students.