PDF chapter test TRY NOW

What is green manure?
 
a. Plants like __________ are cultivated, grown in the field, and mulched by ploughing into the soil before sowing the main crop.
b. The plants gradually decomposes and turns into green manure that enriches the nitrogen and  phosphorous content in the soil.
c. Application of green manure decreases the growth and yield of the crops.
d. Green manure helps to improve aeration and the crumb structure of the soil.