Question

How does flooding rice fields reduce the need for herbicides and pesticides in rice farming?

Answer 1

a.
While rice has a submerged growth state, most weeds and pests do not.
b.
Flooding the fields causes the soil to degrade so weeds cannot take root.
c.
Residual herbicides and pesticides from previous seasons dissolve in the water.
d.
All of the above

Answer 2

b