Which of the following are considered organic manure?
(a) Urea
(b) Composted cow dung
(c) Ammonium sulphate
(d) Plant residues
1
a and b
2
b and c
3
a and d
4
b and d
Which of the following are considered organic manure?
(a) Urea
(b) Composted cow dung
(c) Ammonium sulphate
(d) Plant residues