NSQF Agriculture - Trade Theory (Senior Secondary)
What the theory paper tests
The Senior Secondary NSQF Agriculture trade theory paper checks whether you can explain and calculate the principles behind field operations: crop seasons, soil fertility, fertilizer doses, irrigation, pest management and farm records. Questions often ask you to choose a practice for a Punjab situation and justify it.
Core rules to know
- Kharif crops are sown with the monsoon in June–July and harvested in autumn: paddy, maize, cotton and moong. Rabi crops are sown in October–November and harvested in March–April: wheat, mustard and gram. Zaid is the short summer season for cucurbits and fodder.
- Punjab soils are often alkaline; gypsum is used for sodic soils, while organic manure improves structure and water holding. A soil pH near 6.5–7.5 favours most nutrients.
- Fertilizer grades are quoted on a nutrient basis: urea 46% N, DAP 18% N and 46% P2O5, MOP 60% K2O, SSP 16% P2O5. Always convert the recommended nutrient dose into product weight.
- Integrated pest management order: resistant variety, cultural methods, mechanical control, biological control, then chemical as the last resort; use the economic threshold level before spraying.
Worked example
A wheat field is recommended 120 kg N/ha. The farmer applies 100 kg DAP/ha as basal. How much urea is needed to complete the N dose? DAP supplies N = 100 × 0.18 = 18 kg N/ha. Remaining N = 120 − 18 = 102 kg N/ha. Urea needed = 102 ÷ 0.46 = 221.7 kg/ha. The DAP also supplies 100 × 0.46 = 46 kg P2O5/ha, which must be checked against the phosphorus recommendation. Reason: convert product to nutrient, subtract the nutrient already supplied, then divide by urea's N fraction.
Traps
Do not treat P2O5 as elemental P; do not add DAP's N twice; do not swap kharif and rabi; do not quote a pesticide dose without distinguishing active ingredient from commercial formulation; and do not recommend flood irrigation for every crop.