GATE AG study guide
GATE AG · Work through your exam, one topic at a time.
GATE 2025 (Graduate Aptitude Test in Engineering) is a national-level examination that primarily tests the comprehensive understanding of various undergraduate subjects in Engineering/Technology/Architecture/Science/Commerce/Arts/Humanities. It is organised by Indian Institute of Technology Roorkee (IITR) and conducted by IISc Bengaluru and seven IITs - IIT Bombay, IIT Delhi, IIT Guwahati, IIT Kanpur, IIT Kharagpur, IIT Madras and IIT Roorkee - on behalf of the National Coordination Board (NCB), Department of Higher Education, Ministry of Education, Government of India. The GATE AG study guide has 4 sections and about 1,610 words.
01Engineering - Farm Power and Machinery Calculations
GATE AG tests farm power and machinery here: engine and tractor performance, tillage and sowing implements, harvesting and threshing equipment, and the machinery-management arithmetic that converts these into field capacity, power demand and cost per hectare. Power reaches the soil through transmission and traction, losing energy at each stage.
409 words, about 2 min02Technology - Post-Harvest Processing and Food Engineering
This domain covers post-harvest technology and food engineering: drying and aeration, cleaning and grading, milling and size reduction, material handling, storage, and the mass and energy balances that connect them. Wet basis (wb) puts water over total wet mass; dry basis (db) puts water over dry matter only, with db = wb/(100 − wb) × 100.
393 words, about 2 min03Architecture - Farm Structures and Environmental Control
In GATE AG this domain means agricultural structures and environmental control: grain bins and silos, farm buildings and livestock housing, greenhouses, plus the ventilation and structural decisions that keep produce and animals inside design conditions. Capacity = volume × bulk density.
398 words, about 2 min04Science - Soil–Water Relations and Irrigation Science
This domain tests soil–water–plant relations and irrigation science: soil moisture measurement, available water, evapotranspiration, irrigation scheduling, application efficiency, infiltration and drainage. Gravimetric content θm is water mass per dry soil mass; volumetric content θv = θm × bulk density (g/cm³).
410 words, about 2 min