If fertilizer prices go up the optimum close should

The optimum fertilizer dose is one which maximizes

Fertilizer use is profitable if each rupee spent on fertilizer produces crop worth atleast

Balanced fertilizer use is most desirable because it

The contribution of fertilizers to increase in food production is

On an average 1 kg N, P₂O₅, K₂O added increased grain yield by

Two nutrients needed by plant in largest amounts are nitrongen and

Nutrient movement slows down in a dry soil due to

Nutrient uptake by crops is fastest during

The most common phosphate fertilizer in India is