RBSE Sec Voc Agriculture cheat sheet

Cropping intensity (%) = (total cropped area ÷ net sown area) × 100; values above 100 indicate multiple cropping on the same land in one year.

Cropping system terms: sole crop = one crop alone; mixed cropping = two or more crops sown together without row arrangement; intercropping = crops in definite rows; sequence cropping = crops grown one after another.

Land Equivalent Ratio (LER) = sum of (intercrop yield ÷ sole-crop yield) for each component; LER > 1 means the intercrop combination out-yields sole cropping.

Crop water requirement follows ET = evaporation + transpiration; critical irrigation stages include crown root initiation in wheat, flowering in pulses, and tasselling in maize.

Seed rate (kg/ha) = (desired plant population per ha × test weight in g) ÷ (1000 × germination fraction × purity fraction × field establishment fraction).

Kharif crops are sown with monsoon onset (June–July) and harvested in autumn; rabi crops are sown October–December and harvested March–April; zaid is the short summer season.

Crop rotation with a legume fixes atmospheric nitrogen via Rhizobium symbiosis and interrupts soil-borne pathogen and pest cycles.

Harvest index = (economic yield ÷ total biological yield) × 100; it measures the share of dry matter partitioned to the harvested product.

Soil texture classes follow the percentages of sand, silt and clay; the textural triangle converts these percentages into a class name such as sandy loam or clay.

Bulk density = oven-dry soil mass ÷ total soil volume (g/cm³); particle density of most mineral soils is about 2.65 g/cm³.

Porosity (%) = [1 − (bulk density ÷ particle density)] × 100; a bulk density of 1.33 g/cm³ gives roughly 50% porosity.

Soil pH below 6.5 favours lime application; above 8.5 in arid soils indicates sodicity, often with high exchangeable sodium percentage (ESP > 15).

Available nutrient status is rated low, medium or high against critical limits; fertilizer dose is adjusted by soil test value and crop requirement.

Nitrogen is lost through volatilization (ammoniacal fertilizers on dry calcareous soils), denitrification (waterlogged soils) and leaching (nitrate); split application reduces losses.

Organic matter improves water-holding capacity, cation exchange capacity and aggregate stability; C:N ratio near 10:1 favours rapid mineralization.

Essential macronutrients: N, P, K, Ca, Mg, S; micronutrients: Fe, Mn, Zn, Cu, B, Mo, Cl, Ni. Deficiency symptoms often appear first on old or young leaves depending on mobility.

Economic threshold level (ETL) is the pest density at which control measures are justified to prevent the population from reaching the economic injury level.

Insecticide formulation codes: EC = emulsifiable concentrate, WP = wettable powder, SC = suspension concentrate, G = granule, SL = soluble liquid; dose is stated as active ingredient per hectare.

Spray volume (L/ha) = (nozzle output in L/min × number of nozzles × 600) ÷ (speed in km/h × swath width in m).

Integrated pest management sequence: monitoring and scouting → cultural and mechanical methods → biological control → need-based chemical application.

Key disease signs: powdery mildew = white powdery growth; downy mildew = greyish growth on leaf underside; rust = orange-brown pustules; bacterial wilt = sudden wilting with vascular browning.

Koch's postulates establish a pathogen as the cause of a disease: constant association, isolation in pure culture, reproduction of symptoms on inoculation, and re-isolation.

Pesticide label elements include active ingredient, formulation, toxicity class (colour-coded triangle), dose, waiting period and pre-harvest interval.

Resistance management: rotate insecticide mode-of-action groups and avoid repeated use of the same chemical class within a season.

Propagation types: sexual (seed) gives variability and is used for papaya, tomato and rootstocks; asexual (cutting, layering, grafting, budding) preserves cultivar characters.

Grafting union requires matching cambium layers of scion and rootstock; grafting is used for mango, guava and citrus to combine vigour control with desired fruit quality.

Pruning removes unwanted growth to balance vegetative and reproductive growth; training shapes the plant framework (centre-leader, open-centre, trellis systems).

Vegetable nursery management: raised beds, well-decomposed FYM, seed treatment, and transplanting at 3–5 true-leaf stage improve establishment.

Floriculture crops are grouped as loose flowers (marigold, chrysanthemum, jasmine) and cut flowers (rose, gerbera, carnation); post-harvest cool storage extends vase life.

Orchard layout systems include square, rectangular, quincunx and hexagonal; plant population per hectare = 10,000 ÷ (row spacing in m × plant spacing in m).

Fruit maturity indices: days from fruit set, skin colour change, total soluble solids (TSS), firmness and starch-iodine test; TSS is measured with a refractometer in °Brix.

Protected cultivation (polyhouse, shade net, low tunnel) modifies temperature, humidity and light to extend the growing season and improve quality.

Ration balancing: dry matter intake of cattle is roughly 2–2.5% of body weight; a balanced ration supplies energy, protein, minerals and vitamins in required proportion.

Feed fractions: roughage (green fodder, dry straw) and concentrate (cereal grains, oil cakes); total digestible nutrients (TDN) and crude protein (CP) are standard measures of feed value.

Milk composition of cow and buffalo milk: water about 86–88%, fat 3.5–8%, protein 3.2–3.5%, lactose about 4.5–5%; buffalo milk has higher fat than cow milk.

Clean milk production sequence: wash udder and hands, fore-strip and check for mastitis, use clean dry utensils, filter and cool milk promptly to about 4 °C.

Common cattle diseases: foot-and-mouth disease (vesicles, salivation), mastitis (udder inflammation, abnormal milk), bloat (rumen distension) and haemorrhagic septicaemia.

Vaccination and deworming schedules, plus record keeping of breeding dates, calving and milk yield, are core herd-health and herd-improvement practices.

Artificial insemination uses frozen-thawed semen; heat detection and timing of insemination (roughly 12 hours after standing heat) determine conception rate.

Silage and hay conservation: silage is fermented high-moisture fodder in an airtight pit; hay is sun-dried fodder with low moisture for storage.

Draft (N) required by a tillage implement = soil resistance per unit area × area of soil disturbed; draft increases with depth and speed.

Field capacity (ha/h) = (implement width in m × forward speed in km/h) ÷ 10; field efficiency (%) = theoretical field capacity ÷ actual field capacity × 100.

Power tillers, mouldboard ploughs, disc harrows, cultivators, seed drills and combine harvesters are matched to tractor horsepower and soil conditions.

Seed drill calibration: seed rate is checked by collecting seed from a few tubes over a measured run and comparing with the target kg/ha.

Irrigation water requirement = crop evapotranspiration − effective rainfall + losses; irrigation scheduling uses soil moisture depletion or pan evaporation data.

Drip irrigation delivers water at the root zone with high application efficiency (often above 90%) and enables fertigation; sprinkler suits closely spaced crops.

Farm power sources: human, animal, mechanical (tractor, power tiller) and electrical; farm mechanization reduces drudgery and timeliness losses.

Safety and maintenance rules: check oil and coolant, guard moving parts, and keep PTO shafts shielded; worn tynes and blunt blades raise draft and fuel use.

Gross income = yield × price; net income = gross income − total cost; farm profit is maximized where marginal revenue equals marginal cost.

Cost concepts: fixed cost (land rent, depreciation, interest) does not vary with output; variable cost (seed, fertilizer, labour) does.

Benefit-cost ratio = total benefits ÷ total costs; a ratio above 1 indicates a profitable investment.

Marketable surplus = production − family consumption − seed and feed retention; it determines the volume a farmer can sell.

Marketing channels are the paths from producer to consumer; each intermediary adds margin, and the producer's share falls as channel length increases.

Price spread = consumer price − producer price; marketing efficiency improves when price spread narrows relative to the services provided.

Farm records include physical records (livestock, land, machinery) and financial records (cash book, ledger, inventory); they support credit and planning decisions.

Risk and uncertainty in farming arise from weather, pests, and price fluctuation; crop insurance and diversification are common risk-management tools.

Extension is a two-way educational process that links research, farmers and the community to improve farm and home practices.

Communication model: sender → message → channel → receiver → feedback; noise is any interference that distorts the message.

Teaching methods: individual (farm visit, office call), group (demonstration, field day, meeting) and mass (radio, television, print, social media).

Adoption stages: awareness → interest → evaluation → trial → adoption; adopters range from innovators to laggards.

Demonstration types: method demonstration teaches how to do a practice; result demonstration shows the outcome of a practice in the field.

Survey and evaluation tools include interview schedules, questionnaires, group discussion and observation; data are summarized as frequency, percentage, mean and rank.

Rural institutions such as cooperatives, self-help groups and farmer producer organizations support input supply, credit and collective marketing.

Diffusion of innovation depends on relative advantage, compatibility, complexity, trialability and observability of the practice.

Agribusiness spans input supply, production, processing, storage, transport and marketing; value addition raises product worth at each stage.

Business plan components: product, market analysis, production plan, cost estimate, cash flow, break-even point and risk assessment.

Break-even quantity = fixed cost ÷ (selling price per unit − variable cost per unit); beyond this output the enterprise earns profit.

Working capital = current assets − current liabilities; it covers day-to-day inputs such as seed, feed and wages.

Sources of agri-finance include bank crop loans, Kisan Credit Card, self-help group credit and government subsidy schemes; repayment capacity depends on cash flow.

Enterprise skills: record keeping, costing, quality grading, packaging, branding, negotiation and customer feedback.

Vocational options in agriculture include nursery raising, mushroom cultivation, beekeeping, dairy, poultry, vermicomposting and custom hiring of machinery.

Direct marketing and farmer producer organizations reduce intermediary margins and can improve the producer's share of the consumer rupee.

Field plot layout: randomize treatments across replications to reduce soil variability; record plot size, number of replications and treatment codes before sowing.

Sampling procedure: collect soil samples from several spots in a zig-zag pattern at plough-layer depth, mix, quarter and send a representative composite sample.

Observations to record per plot: germination count, plant height, number of branches, days to flowering, pest and disease incidence, yield and test weight.

Project report structure: title, objectives, need and market, materials and methods, observations, cost and returns, conclusion and references.

Yield per hectare = (plot yield in kg ÷ plot area in m²) × 10,000; convert consistently before comparing treatments.

Record book discipline: date, operation, input quantity, labour used and cost entered on the same day the work is done.

Safety in field and laboratory work: use gloves and masks for chemical handling, follow label instructions, and dispose of pesticide containers safely.

Assessment of a practical project considers planning, accuracy of records, data analysis, interpretation and clarity of presentation.