2293AgricultureMedium
Humus generally refers to the decomposed organic residues which have undergone a series of degradation and synthesis cycles. The humic substances consist of a series of highly acidic, yellow to black coloured, high molecular weight compounds ________, which can be separated using different extraction procedures:
AHymatomelanic acid & Humin
BHumic acid & Fulvic acid
CNone of these
Dboth A & B
Correct answer
D. both A & B
Explanation
The correct answer is both A & B.