Answer:
Humus, which ranges in colour from brown to black, consists of about 60 percent carbon, 6 percent nitrogen, and smaller amounts of phosphorus and sulfur. As humus decomposes, its components are changed into forms usable by plants.
samira-
Answer:
it must be testable I think that's the answer
<span>i think the answer should be 2KOH +H2SO4=K2SO4+2H20</span>
