CHAPTER 4 SOIL
A soil profile is a vertical section through which different sections of the soil can be seen. The different layers are also known as Horizons.
Soil contains sand and clay. The proportion of particles determine the kind of soil.
PROPERTIES OF SOIL
1. Percolation rate of water
Percolation rate is the gradual movement of water through the soil.
Percolation rate= Amount of water(mL) / Percolation time(min)
2. Moisture in soil
It is the amount of water in the soil.
3. Absorption of water
The capacity to absorb water by the soil is called absorption capacity. Different soils have absorption capacity.
SOIL & CROPS
Removal of top soil by wind, water or ice is called soil erosion. This degrades the soil quality.