Hello aspirant

Afo exam consists of three stages

Preliminary, Main and Interview

For preliminary

• Reasoning(verbal and nonverbal)
• Quantitative reasoning
• English language

For mains, you need to have professional knowledge about agriculture.(Agriculture current affairs, crops, fruits and vegetables, seed technology, agricultural economics, various agricultural practices, soil resources, animal husbandry, rural welfare activities in india)

The candidates passing mains exam will be called for interview.

Hope this helped you.