Spectrum Analytic, Inc (OH)
Soil Test Packages: S1:Soil pH, Buffer pH, P, K, Ca, Mg, OM, Cation Exchange Capacity, and Base Saturation of Cations Tissue Test Packages: Complete:Nitrogen, Phosphorus, Potassium, Calcium, Magnesium, Sulfur, Boron, Copper, Iron, Manganese, Zinc, Sodium