Which of the following is NOT a chemical property of soil?

Moisture retention is not classified as a chemical property of soil; rather, it is a physical property. This is because moisture retention refers to the soil's ability to hold water and is influenced by the soil's texture and structure, which are physical characteristics.

In contrast, cation exchange capacity, salinity, and pH are all chemical properties. Cation exchange capacity pertains to the soil's ability to retain and exchange positively charged ions (cations) that are essential for plant nutrition. Salinity refers to the concentration of salts in the soil, which affects plant growth and health. pH measures the acidity or alkalinity of the soil, influencing nutrient availability and microbial activity.

Understanding the distinction between physical and chemical properties of soil is crucial for evaluating soil health and its suitability for supporting various plant species, as well as for properly managing on-site sewage facilities.