Contents
What is Soil Depth?
Soil depth refers to the thickness of soil cover over hard rock or hard substratum below which roots cannot penetrate
It is directly related to
1. development of root system
2. water storage capacity
3. nutrient supply
4. feasibility for land leveling and land shaping
Classification of Soil depth
According to the Soil Conservation Division, New Delhi, following categories of soil have been mentioned on the basis of its depth
Very shallow
Soil depth is Less than 7.5 cm
Shallow
Soil depth is between 7.5 cm to 22.5 cm
Moderately deep
Soil depth is between 22.5 cm to 45 cm
Deep
Soil depth is between 45 cm to 90 cm
Very Deep
Soil depth is between 45 cm to 90 cm
What are the effects of soil depth on irrigation?
Soil depth is also important for interpreting water storage capacity
Shallow soil
A shallow soil will require frequent irrigations because it has has limited moisture holding capacity
Deep soil
Deep soil will require less frequent irrigations because it has good moisture holding capacity
Further readings and references
Handbook of Agriculture
