Organic matter is organic compounds or mixtures of organic compounds.

the different sources of organic matter in the soil are as follows

1. dead decaying plants and animals forming humus.

1. Air

2. Water

3. Organic Matter

4. Mineral Matter

Organic matter (or organic material) is matter that has come from a once-living organism; is capable of decay, or the product of decay; or is composed of organic compounds. The definition of organic matter varies upon the subject it is being used for.