Punjab PSEB Matric NSQF Agriculture cheat sheet

Soil pH ranges: strongly acid below 5.5, slightly acid 6.0–6.5, neutral 6.6–7.3, alkaline above 7.3; most Punjab field crops (wheat, rice, maize) perform best at pH 6.5–7.5.

Major Punjab soil groups: alluvial (Indo-Gangetic plain, most cropland), arid brown/desert soils in the south-west, sodic and saline patches in south-west districts, and kandi belt soils in the north-east sub-montane zone.

Essential macronutrients for plants: N, P, K, Ca, Mg, S; micronutrients: Fe, Mn, Zn, Cu, B, Mo, Cl, Ni. Punjab soils are most commonly deficient in nitrogen, then phosphorus, then zinc and sulphur.

Fertiliser nutrient conversions: urea (46-0-0) contains 46% N; DAP (18-46-0) contains 18% N and 46% P2O5; MOP (0-0-60) contains 60% K2O; SSP (0-16-0) contains 16% P2O5 plus 11–12% sulphur and calcium.

Seed rate and sowing rules (typical): wheat about 40–50 kg/acre, paddy nursery about 8–10 kg/acre of transplanted crop, maize about 8–10 kg/acre; sow wheat in November and transplant paddy in June–July to match the Punjab cropping calendar.

Irrigation decision rules: critical stages for wheat are crown root initiation (about 20–25 days after sowing), tillering, jointing, flowering and milk stage; paddy needs standing water at transplanting and panicle initiation; avoid irrigation within about 10–14 days of wheat harvest.

Crop rotation principle: cereal–legume rotation (e.g., rice–wheat with a pulse or berseem) restores nitrogen, breaks pest cycles and improves soil organic matter versus continuous cereal cropping.

Integrated pest management sequence: monitoring and economic threshold level first, then cultural and mechanical control, then biological control, and chemical pesticide only as the last resort with correct dose and pre-harvest interval.

Post-harvest and storage rules: grain safe for storage should be dried to about 12–14% moisture; store in clean, dry, fumigated bins; aflatoxin risk rises when groundnut or maize is stored above about 14% moisture.

Tillage implements: mouldboard plough for primary inversion, disc harrow for secondary tillage, cultivator for loosening, rotavator for seedbed preparation in one pass, and leveller/laser leveller for uniform irrigation.

Sowing and planting equipment: seed drill and seed-cum-fertiliser drill for line sowing, zero-till drill for sowing wheat into standing paddy stubble without ploughing, and transplanter for paddy seedlings.

Sprayer calibration formula: volume applied (L/ha) = (nozzle output in L/min × 600) ÷ (speed in km/h × swath width in m); check nozzle output before every spraying season.

Spray safety rules: wear gloves, mask and full sleeves; never eat, drink or smoke during spraying; spray with wind behind you; observe the labelled pre-harvest interval; triple-rinse empty containers and puncture them before disposal.

Pesticide label information to read: active ingredient and formulation type (EC, WP, SC), recommended dose per acre, target pest, waiting period, phytotoxicity warning, and first-aid instructions.

Farm machinery safety: engage the power take-off only at the recommended engine rpm, keep the PTO shaft guard in place, never clear a jammed implement with the engine running, and use the roll-over protective structure and seat belt on tractors.

Irrigation methods and choice: furrow irrigation for row crops, basin irrigation for orchards, sprinkler for undulating or sandy soils, drip for horticulture and water-scarce areas; drip saves roughly 40–60% water versus flood irrigation.

Livestock basics: a balanced ration needs energy, protein, minerals and vitamins; clean drinking water should be available at all times; a rough thumb rule is about 2.5–3 kg of green fodder and 0.5–1 kg of dry fodder per 100 kg body weight per day.

Farm record rules: keep a daily labour and input register, a machinery log, and a produce sale record; calculate gross margin as gross income minus variable costs, and net profit after fixed costs and depreciation.

Seed quality checks: germination percentage, purity percentage, moisture content below about 12%, freedom from weed seeds, and a valid seed certification tag with lot number and date of test.

Disease triangle: a disease develops only when a susceptible host, a virulent pathogen and favourable environmental conditions occur together; removing any one leg prevents an epidemic.

Common Punjab crop diseases: wheat - yellow rust, brown rust, loose smut, karnal bunt; paddy - bacterial blight, blast, sheath blight; cotton - cotton leaf curl virus, root rot; mustard - white rust and alternaria blight.

Pest identification rules: chewing pests (cutworm, bollworm larvae) damage foliage and fruiting bodies; sucking pests (aphids, whitefly, jassid) cause curling, yellowing and honeydew; store-grain pests include weevils and khapra beetle.

Weed management sequence: preventive measures, then mechanical or manual weeding at the critical weed-free period (roughly the first 30–45 days for most field crops), then herbicide with correct dose and nozzle type.

Herbicide safety and resistance: rotate herbicide modes of action, apply at the recommended growth stage, avoid spray drift to neighbouring crops, and never mix incompatible products without a jar test.

Soil sampling rule: collect samples from 0–15 cm depth in a zig-zag pattern from about 10–15 spots per field, mix them, quarter down to about 500 g, air-dry in shade, and label with field, date and crop history.

Soil Health Card interpretation: low, medium and high status for N, P, K, S and micronutrients guides fertiliser dose adjustment; apply organic manure (FYM or compost) to build organic carbon, which is typically low in Punjab soils.

Green manuring and residue rules: grow dhaincha or sunhemp and incorporate before flowering; do not burn crop residue, as burning destroys organic matter and nutrients and is legally restricted in Punjab.

Farm economics formulas: gross income = yield × price; gross margin = gross income − variable costs; benefit–cost ratio = gross income ÷ total cost; break-even yield = total fixed cost ÷ (price − variable cost per unit).

Marketing and support: Punjab Agricultural University recommends crop varieties and package of practices; minimum support price applies to notified crops; keep a grading and weighing record when selling at a regulated market (mandi).