Humus is the dark, spongy, highly nutritious layer of organic matter in soil formed by the complete decomposition of dead plants, leaves, animal waste, and other organic materials by microorganisms.
Color: Dark brown to black.
Formation: Complete decomposition of organic matter by microbes.
Main Benefit: Improves soil fertility and water retention.
Where Found Most: Tropical rainforests (thick humus layer).
When leaves fall from trees, dead animals decompose, or animal dung is left on the ground, bacteria, fungi, and earthworms break this organic material down over months or years into a dark, stable substance called humus.
Compost is partially decomposed organic matter (made at home with kitchen waste). Humus is the final, fully stabilized product after complete decomposition — it takes much longer to form naturally.
Humus is dark, organic matter in soil formed by the complete decomposition of plant and animal material by microorganisms.
Humus improves soil fertility by releasing nutrients (N, P, K), retains water, and improves soil structure for better root growth.
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