The denitrification means
Reduction of $NO_2$ to ammonia form by bacteria in the soil
Oxidation of ammonia to nitrate form
Conversion of ammonia to amino acids
Conversion of ammonia and nitrates to gaseous nitrogen in the soil
A legume having symbiotic association with two nitroge fixing bacteria (Rhizobium and Aerorhizobium) is
‘Rotenone' is
$BHC $ and $DDT $ belong to which class of pesticides
Father of green revolution in India is
Sunhemp is obtained from