Consider the following statements about organic farming
$I.$ Organic farming promotes the use of crop rotations and cover crops and encourages balanced host/predator relationships
$II.$ Integrated pest and weed management and soil conservation systems are valuable tools on an organic farm
$III.$ Organic farming protects the environment, minimize soil degradation and erosion and decrease pollution
Which of the statements given above are correct?
Which disease is caused in children due to excessive use of nitrate fertilizers
Match the columns :
Column - $I$ | Column - $II$ |
$(a)$ Mycrrohiza | $(1)$ Rhizobium |
$(b)$ Bt | $(2)$ Nucleopolyhydro virus |
$(c)$ Root nodules | $(3)$ Phosphorus |
$(d)$ Baculo virus | $(4)$ Bt -Cotton |
Which of the following is used as biofertiliser?
$I.$ Cyanobacteria
$II.$ Yeast
$III.$ Symbiotic bacteria
$IV.$ Free living bacteria
Choose the correct option
What would happen if oxygen availability to activated sludge flocs is reduced ?