Transcription of Cation Exchange Capacity (CEC) - Cornell University
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Cation Exchange Capacity (CEC) - Cornell University
Fact Sheet 22 Cation Exchange Capacity (CEC) Agronomy Fact Sheet Series Department of Crop and Soil Sciences 1 College of Agriculture and Life Sciences Cations are positively charged ions such as calcium (Ca2+), magnesium (Mg2+), and potassium (K+), sodium (Na+) hydrogen (H+), aluminum (Al3+), iron (Fe2+), manganese (Mn2+), zinc (Zn2+) and copper (Cu2+). The Capacity of the soil to hold on to these cations called the Cation Exchange Capacity (CEC). These cations are held by the negatively charged clay and organic matter particles in the soil through electrostatic forces (negative soil particles attract the positive cations). The cations on the CEC of the soil particles are easily exchangeable with other cations and as a result, they are plant available. Thus, the CEC of a soil represents the total amount of exchangeable cations that the soil can adsorb.
Fact Sheet 22 Cation Exchange Capacity (CEC) Agronomy Fact Sheet Series Department of Crop and Soil Sciences 1 College of Agriculture and Life Sciences
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