The percentage of culturable commended area, irrigated during the year to the total culturable commanded area on a outlet or channel is called________?

Chemical added to pesticide to increase its activity is called________?

What is function of deterrent________?

Eugenics refers to________?

A gas produced by anaerobic decomposition of organic compounds is called as________?

During the peak stage of river, there exist an out flow from river into the ground water reservoir, in such case river will be called ________?