What is soil colloid?

Soil colloid refers to the small particles in soil that are less than 2 micrometers in size. These particles are made up of clay, organic matter, and other minerals, and they have a large surface area relative to their size. Soil colloids play a crucial role in soil fertility and nutrient availability, as they can hold onto and exchange nutrients with plant roots. They also help to improve soil structure and water retention.

Soil colloid is a type of soil particle that is smaller than 0.002 mm in diameter and can be either inorganic or organic. It is composed of clay minerals, humus, and metal oxides. Soil colloids have a large surface area and are able to adsorb water and nutrients. They also play a role in soil structure and aggregation.