extension.purdue.edu4 年
Fundamentals of Soil Cation Exchange Capacity (CEC)
The relative ability of soils to store one particular group of nutrients, the cations, is referred to as cation exchange capacity or CEC. Soils are composed of a mixture of sand, silt, clay and ...
extension.purdue.edu11 个月
SOIL TESTING
Lawn & Garden Soil Analysis, $20.00. Includes Soil pH, Buffer pH, Available Phosphorus, Exchangeable Potassium, Organic Matter, Magnesium, Calcium, Cation Exchange Capacity, and Percent Base ...