Question

D) Answer the following in brief:
Q13. Nitrogen is an essential nutrient for plant growth. But farmers who cultivate pulses like green gram, bengal
gram etc. don't use nitrogenous fertilizers during cultivation. Why?​

Answer 1

Answer:

it is because some amount of nitrogen is already present in soil so farmers don't use the the nitrogen fertilizers

Answer 2

Answer:

Roots of plants like green gram, bengal gram, etc are used by farmers during cultivation for the provision of nitrogen

Explanation:

BECAUSE, THE ROOTS OF LEGUMINOUS PLANTS(  pulses) CONTAIN A SPECIAL BACTERIA KNOWN AS RHIZOBIUM WHICH HELPS IN THE FIXATION OF NITROGEN. THUS, FARMERS HAVE NO NEED OF NITROGEN FERTILIZERS.