What is humus and why is it important for soil

humus the dead remains of plants and animals.lt is important for the soil because it helps the plants grow better as it contains minerals for the soil

Humus is dark, organic material that forms in soil when plant and animal matter decays. Humus contains many useful nutrients for healthy soil. One of the most important is nitrogen. Nitrogen is a key nutrient for most plants.

Explanation:

. Nutrient supply

Organic matter contains nutrients that are released after the breakdown by soil organisms. Studies indicate that two to three pounds of sulfur, 4.5 to 6.6 pounds of phosphorus oxide and 20 to 30 pounds of the macro-element nitrogen are released by every percent of organic matter found in the soil.

2. Water holding capacity

For the soil to be healthy, it must have enough moisture. It must also have a good water retention capacity according to different crop requirements. Organic matter provides the soil with the capacity to retain water. It acts like a sponge and it has the capacity to hold water, approximately 90 percent of its own weight. Water being held by the organic matter is readily available to the crops when needed.

3. Cause soil aggregation

Soil aggregation is formed by clumping together of soil particles. Organic matter has the capability of causing the soil particles to clump together due to its adhesive properties to form soil aggregates. Soil aggregation improves soil structure which is also a property of healthy soil.

4. Improves soil structure

Soil structure is the aggregation of soil particles in different patterns. A good soil structure is an indicator of healthy soil. One of the most significant factors affecting soil structure is the presence or absence of humus.