Availability of agricultural land (fixed factor) is limited in the world, but demand of food grain is continuously increasing. Is it possible to increase the supply of food grains by continuously increasing variable factors like seeds, fertilizers etc.?

Explanation

Availability of agricultural land is limited in the world, production of food grains may be increased by continuous increase in variable factors only upto a optimum combination with fixed factor. After that law of negative returns is applied.
Value: Critical thinking