51.
Which of the following is not a method used to preserve the fertility of topsoil?
(a) crop rotation
(lclearing a field of all plants occasionally so that the nutrients are not being used up and
can replenish
(c) ploughing under plant materials left in the field
(d) planting soybeans in field to increase nitrogen levels
Answers
Answered by
1
Answer:
d.planting soybeans in field to increase nitrogen levels
Pls mark me as brainliest.....
Similar questions