Question

3. Weeds can be defined as —
a. Useful plants present in the field
C. Plants that cannot be used at all
4. Manures are -
b. Undesirable plants present in the field
d. Undesirable insects present in the field.​

Answer 1

Answer:

3. Weeds can be defined as —

ans - plants that cannot be used at all.

Manures are-

ans- undesirable plants present in the field

Answer 2

Answer:

answer is undesirable plants present in the flied

Explanation:

Undesirable plants present in the flied means some of the unwanted plants are growing naturally with other useful crop