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Humus, HYOO muhs, is a dark brown substance found in soil. It is formed when roots, plants, and the dead bodies of small animals decay. The decay is caused by the action of microscopic living beings called bacteria and fungi. The amount of humus in soil affects the soil's texture and its ability to hold moisture and to supply necessary food. A good mixture of humus generally increases the yield and quality of a crop. More »
THE FERTILIZERS LIBRARY
Anhydrous ammonia, an HY druhs uh MOHN yuh, is the liquid form of pure ammonia gas. Because of... More >>
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