Soils below the critical level of available nutrient are expected to

A. Be unproductive

B. Be toxic

C. Respond to fertiliser

D. Both A and B

Answer: Option C

Solution(By Examveda Team)

Soils below the critical level of available nutrients are expected to respond to fertilizer. The nutrient concentration in the plant below which a yield response to added nutrient occurs. Critical levels or ranges vary among plants and nutrients but occur somewhere in the transition between nutrient deficiency and sufficiency.