Question

After red gram, maize and corn are cultivated because _________________.

• A. They increase fertility of soil
• B. They fix $N_2$ in soil
• C. They enhance growth of plant
• D. They prevent disease caused by spotted bollworm

Answer 1

The correct option is A They increase fertility of soil

Total dry matter and yield of maize, corn and red gram planted in soil have shown an increase in the soil fertility. Maize and corn not known to fix atmospheric nitrogen. Spotted bollworm affect the cotton plants and the gram, maize and cotton do not affect the pathogenesis.

So, the correct answer is, 'They increase the fertility of soil'.