THE part played by humic manures in soil processes and in plant nutrition, both as a source of mineral elements and by improving the physical condition of the soil, is well known. The advantages ...
Humus is highly recalcitrant, and this resistance to decomposition leads to a long residence time in soil. Plant debris is less recalcitrant, resulting in a much shorter residence time in soil.
You can actually see humus, it’s what gives soil its dark brown color. Generally, the darker the soil, the more humus there is. Humus is essential for healthy soil. It improves soil tilth and ...