GATE 2022: List of Expected Important Topics for Agriculture Engineering

Linear Algebra

• Matrices & Determinants
• Consistency of Linear Equation
• Eigenvalues and Eigenvectors

Calculus

• Maxima and Minima of function with several independent variables
• Fourier, Taylor and MacLaurin series

Vector Calculus

• Basic Vector
• Gradient
• Divergence and curl
• Surface and volume integrals

Differential Equations

• Partial Differential Equations - Laplace, heat and wave equations
• Partial Differential Equation

Probability & Statistics

• Basic graph
• Poisson, normal and binomial distributions

Numerical Methods

• Numerical integration - Trapezoidal and Simpson’s rule

Machine Design

• Design of gears, pulleys, chains & sprockets and belts

Farm Machinery

• Direct questions from Soil Tillage
• Direct questions on Chaff Cutting
• Direct questions on harvesting and threshing calculation of performance parameters - field capacity, efficiency, application rate and losses, cost analysis of implements and tractors
• Spraying 

Sources of Power

• Wind, solar and biomass

Farm Power

• Fuels and Combustion
• Power efficiency
• Measurement
• Calculation of power, torque, fuel consumption

Tractors and Power Tillers

• Power transmission systems
• Traction theory
• Mechanics of Tractor chassis
• Three-point hitches
• Human engineering and safety considerations in design of tractor and agricultural implements

Fluid Mechanics

• Hydrostatic pressure and its measurement
• Continuity equation

Soil Mechanics

• Engineering properties of soils
• Fundamental definitions and relationships
• Mohr’s circle of stress

Hydrology

• Analysis of precipitation data
• Runoff estimation
• Hydrograph analysis
• Unit hydrograph theory and application

Surveying and Leveling

• Measurement of distance and area
• Instruments for surveying and leveling
• Chain surveying, methods of traversing
• Measurement of angles and bearings
• Total station

Soil and Water Erosion

• Mechanics of soil erosion 
• Soil loss estimation using equation

Soil-Water-Plant relationship

• Water requirement of crops

Irrigation Water Conveyance and Application Methods

• Surface, sprinkler and micro-irrigation methods
• Direct questions on irrigation efficiency

Agricultural Drainage

• Drainage co-efficient
• Leaching requirement and salinity control
• Non-conventional drainage system

Groundwater Hydrology

• Darcy’s Law

Wells and Pump

• Classification of pumps
• Pump characteristics
• Pump selection and installation

Engineering Properties of Agriculture Produce

• Basics of processing

Evaporation & Drying

• Psychrometry – properties of air-water vapour mixture

Size Reduction & Material Handling

• Mechanics and energy requirement in size reduction of agriculture produce
• Size separation by screening
• Effectiveness of separation

Heat and Mass Transfer

• Formula-based questions
• Steady-state heat transfer in conduction, convection and radiation
• Working principles of heat exchangers
• Water activity

Preservation of Foods

• Kinetics of microbial death

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