Question

1. After ____ the soil becomes deficient in nitrogen.
a. sowing.
b. harvesting.
c. irregation.
d. all of these​

Answer 1

Answer:

After harvesting the soil becomes deficient in nitrogen

Hope it helps

Answer 2

After harvesting the soil becomes deficient in nitrogen. This is because plants use up the nitrogen by nitrogen fixation to manufacture food and hence after harvesting nitrogen becomes deficient.