8.
Materials of biological origin which are commonly
used to maintain and improve soil fertility are
(1) Green manures (2) Biofertilizers
(3) Bioinsecticides (4) Both (1) and (2)
Answers
Answered by
1
Green manures and bio fertilisers are commonly used for soil fertility
So your answer is both 1&2
Bio insecticides are used to increase plant resistance
So your answer is both 1&2
Bio insecticides are used to increase plant resistance
Answered by
3
Answer:
answer : Green manures.
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