Maharashtra SSC Green House Grade study plan

Explain how latitude, prevailing wind direction, and solar geometry determine the ideal ridge orientation for a naturally ventilated greenhouse in Maharashtra, and state the trade-off when wind and sun conflict.

Compare a trench, a raised-bed, and a flat-ground layout and justify which suits a site with a 2% slope and a high water table.

Calculate the structural span, bay spacing, and gutter height needed to house a 500 m² tomato crop with a 2.5 m clear working aisle.

Identify the load cases (wind load, crop load, snow-free but rain ponding) that govern the design of a GI pipe and a bamboo structure, and rank them by risk.

Sketch a site plan that places the greenhouse, pack-house, water tank, and access road to minimise shading and runoff entry.

Distinguish UV-stabilised polyethylene film, polycarbonate sheet, and glass by light transmission, service life, and cost, and select one for a humid coastal district with justification.

Compute the heat loss penalty of a single-layer film versus a double-layer inflated film using U-values, and state the payback logic.

Describe how to install and tension a film cover with a zig-zag wire and profile, and list the three most common causes of film failure in the first season.

Explain the effect of dust, algae, and condensation on light transmission and prescribe a cleaning schedule for each cladding type.

Match insect-proof mesh grades (e.g. 40, 50, 78 mesh) to thrips, whitefly, and fruit fly exclusion, and note the ventilation penalty of finer mesh.

Explain how ventilation rate, roof vent area, and ridge geometry interact to control temperature, and compute the vent area needed for a given floor area rule of thumb.

Describe the operation of fan-and-pad cooling and fogging systems, including the wet-bulb limit and the conditions under which each fails to cool.

Diagnose a humidity problem (Botrytis risk at night) and prescribe a heating, venting, or dehumidification strategy with set points.

Design a daily and seasonal ventilation schedule that accounts for outside wind speed, crop stage, and disease pressure.

Explain how a thermal screen and a shade net differ in function, and state the light-loss cost of each.

Size a drip irrigation system for a 500 m² greenhouse by calculating peak crop water demand, emitter flow rate, number of lines, and required pump head.

Explain the role of each fertigation component (venturi, dosing pump, EC/pH controller, filter, non-return valve) and describe the correct injection sequence.

Diagnose emitter clogging from a water analysis (hardness, iron, bicarbonate) and prescribe acidification or filtration.

Compute leaching fraction and explain how it controls root-zone salinity in a closed versus open system.

Describe how to schedule irrigation by solar radiation sum or by substrate moisture sensor, and state the advantage over a fixed timer.

Compare cocopeat, rockwool, perlite, and vermicompost-based mixes on water holding, air-filled porosity, and reuse potential, and choose one for a low-budget Maharashtra grower.

Prepare a nutrient solution for a fruiting tomato crop from stock solutions A and B, explaining why calcium and phosphate must be kept apart.

Calculate the dilution of a stock solution to reach a target EC, and explain how EC and pH drift signal imbalance or root disease.

Describe how to manage substrate EC, pH, and drainage fraction in a run-to-waste system across a crop cycle.

Explain the difference between open and closed soilless systems and the disinfection step required before reusing drainage water.

Build a diagnostic key that separates the most common greenhouse problems (whitefly, thrips, spider mite, powdery mildew, late blight, blossom-end rot, and calcium deficiency) by symptom and location on the plant.

Design an IPM calendar that combines screening, yellow and blue sticky traps, biocontrol agents, and a rotating chemical schedule with mode-of-action groups.

Explain how humidity management, leaf pruning, and plant spacing reduce disease pressure, and quantify the trade-off with yield.

Describe resistance management rules for a greenhouse where the same active ingredient cannot be used twice in a season.

List the pesticide residue and pre-harvest interval obligations a grower must meet to sell to a supermarket chain.

Compare the greenhouse cultivation package (spacing, pruning, training, expected yield) for tomato, capsicum, cucumber, and a leafy green, and select the most profitable for a small unit.

Explain the role of a climate controller, a CO2 sensor, and a fertigation controller, and describe what a basic low-cost automation kit can and cannot do.

Draft a preventive maintenance schedule for the structure, film, vents, filters, drippers, and sensors, with frequency and owner for each task.

Diagnose a failure in a fan-and-pad system and in a dosing pump using a step-by-step fault-finding sequence.

Explain how to calibrate a pH and EC meter and why an uncalibrated probe causes crop loss.

Describe grading standards for tomato and capsicum by size, colour, and defect, and explain how grading raises price realisation.

Plan a post-harvest chain (harvest maturity, cooling, sorting, packaging, transport) that preserves quality for a distant market, and identify the two most damaging handling errors.

Explain the safety hazards of pesticide handling, electrical equipment in a wet environment, and structural work at height, and state the control for each.

Outline the components of a bankable project report for a protected cultivation unit, including capital cost, subsidy, working capital, and break-even.

Identify the state and central scheme support available for greenhouse construction and list the documents a grower must assemble to apply.