The correct option is C Pressure of population on land
The problems faced in agriculture can be categorised as human problems, institutional problems, and technical problems.
Some of the technical problems are:
1. Traditional technique of cultivation
2. Old agricultural implements
3. Weak cattle
4. Lack of credit facilities
5. Inadequate irrigation facilities
6. Lack of improved seeds
7. Lack of manure
8. Diseases of crops and attacks of pests
9. Defective agricultural marketing system