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Factor affecting organic matter level in soil are—

1. Texture

Soil which contain 30% or more organic matter are considered organic soil.

2. Plant nutrients or crop rotation

If crop rotation is done then high organic matter is found.

3. Cropping

Cropped lands have low organic matter. Modern techniques help to achieve high organic matter.

4. Poorly drained soil

Poorly drained soil contains high organic matter due to high moisture content.

5. Vegetation

Soil in the grasslands have more organic matter.

6. Climate

Organic matter increases with increase in rainfall.

7. pH

If Soil has acidic or alkaline pH then it will have poor organic matter content. We can increase organic matter content by maintaining the normal pH of the soil.