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GATE 2021 Agriculture Engineering (AG) Syllabus, Preparation Tips and Books

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Nikkil Visha

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Agricultural engineering is the engineering discipline related to the studies of agricultural production and processing. GATE 2021 Agricultural Engineering revised syllabus includes 7 major topics which are further divided into various sub-sections.

  • There will be a total of 55 questions from core subject plus engineering mathematics in the exam and the remaining 10 questions will be from the General Aptitude section. Check GATE 2021 Exam Pattern
  • Applicants will have to attempt all the questions worth 100 marks in the duration of three hours. 
  • Also, candidates appearing for GATE AG can also appear for ES as their second paper. 

Candidates applying for GATE Agriculture Engineering (AG) paper can check the complete revised syllabus in the article. Moreover, candidates qualifying GATE 2021 will become eligible to take admission in M.Tech courses offered at prestigious institutes like IITs, NITs, etc.

Must Read: 

GATE Agriculture Engineering Syllabus

GATE 2021 Agriculture Engineering Syllabus

Candidates can check the syllabus for agriculture engineering below:

Section 1: Engineering Mathematics

Engineering Mathematics is one of the important and tough sections of GATE exam. The section carries 15% weightage of questions in the question paper. Engineering Mathematics is the branch of applied mathematics concerning mathematical methods and techniques that are typically used in engineering and industry.

  • Linear Algebra
  • Calculus
  • Vector Calculus
  • Differential Equations
  • Partial Differential Equations
  • Probability and Statistics
  • Numerical Methods

Section 2: Farm Machinery

Farm machinery is one of the most expensive and critical inputs when growing a rice crop. Machinery should be up to date and easy to use.

  • Machine Design: Design and selection of machine elements – gears, pulleys, chains and sprockets and belts; overload safety devices used in farm machinery; measurement of force, stress, torque, speed, displacement and acceleration on machine elements - shafts, couplings, keys, bearings and knuckle joints.
  • Farm Machinery: Soil tillage; forces acting on a tillage tool; hitch systems and hitching of tillage implements, functional requirements, principles of working, construction and operation of manual, animal and power operated equipment for tillage, sowing, planting, fertilizer application, inter-cultivation, spraying, mowing, chaff cutting, harvesting and threshing calculation of performance parameters - field capacity, efficiency, application rate and losses; cost analysis of implements and tractors.

Section 3: Farm Power

Humans, animals, and machines are all used as sources of power in agriculture production. When undertaking different operations on a farm, a certain amount of work is required to complete the task.

  • Sources of Power: Sources of power on the farm - human, animal, mechanical, electrical, wind, solar and biomass; bio-fuels.
  • Farm Power: Thermodynamic principles of I.C. engines; I.C. engine cycles; engine components; fuels and combustion; lubricants and their properties; I.C. engine systems – fuel, cooling, lubrication, ignition, electrical, intake and exhaust; selection, operation, maintenance and repair of I.C. engines; power efficiencies and measurement; calculation of power, torque, fuel consumption, heat load and power losses; performance index, cost analysis of implements and tractors.
  • Tractors and Power tillers: Type, selection, maintenance and repair of tractors and power tillers; tractor clutches and brakes; power transmission systems – gear trains, differential, final drives and power take-off; mechanics of tractor chassis; traction theory; three point hitches - free link and restrained link operations; steering and hydraulic control systems used in tractors; tractor tests and performance; human engineering and safety considerations in design of tractor and agricultural implements.

Section 4: Soil and Water Conservation Engineering

Soil is the thin skin covering the land, clean water is becoming more valuable every day. Soil water relations, evapotranspiration, precipitation, runoff, erosion, flow in natural waterways and through reservoirs, wetland and groundwater hydrology, and water quality.

  • Fluid Mechanics: Ideal and real fluids, properties of fluids; hydrostatic pressure and its measurement; continuity equation, kinematics and dynamics of flow; Bernoulli’s theorem; laminar and turbulent flow in pipes, Darcy- Weisbach and Hazen-Williams equations, Moody’s diagram; flow through orifices, weirs and notches; flow in open channels, dimensional analysis – concepts of geometric dimensionless numbers.
  • Soil Mechanics: Engineering properties of soils; fundamental definitions and relationships; index properties of soils; permeability and seepage analysis; shear strength, Mohr’s circle of stress, active and passive earth pressures; stability of slopes, Terzaghi’s one dimensional soil consolidation theory. AG Agricultural Engineering
  • Hydrology: Hydrological cycle and measurement of its components; meteorological parameters and their measurement; analysis of precipitation data; runoff estimation; hydrograph analysis, unit hydrograph theory and application; streamflow measurement; flood routing, hydrological reservoir and channel routing, Infiltration – indices and equations, drought and its classification.
  • Surveying and Leveling: Measurement of distance and area; instruments for surveying and leveling; chain surveying, methods of traversing; measurement of angles and bearings, plane table surveying; types of leveling; theodolite traversing; contouring; total station, introduction to GPS survey, computation of areas and volume.
  • Soil and Water Erosion: Mechanics of soil erosion - wind and water erosion: soil erosion types, factors affecting erosion; soil loss estimation; biological and engineering measures to control erosion; terraces and bunds; vegetative waterways; gully control structures, drop, drop inlet and chute spillways; earthen dams.
  • Watershed Management: Watershed characterization and land use capability classification; water budgeting in watershed, rainwater harvesting, check dams and farm ponds.

Section 5: Irrigation and Drainage Engineering

Irrigation is the artificial exploitation and distribution of water at the project level aiming at the application of water at field level to agricultural crops in dry areas or in periods of scarce rainfall to assure or improve crop production. 

  • Soil-Water-Plant Relationship: Water requirement of crops; consumptive use and evapotranspiration; measurement of infiltration, soil moisture and irrigation water infiltration. Irrigation Water Conveyance and Application Methods: Design of irrigation channels and underground pipelines; irrigation scheduling; surface, sprinkler and micro irrigation methods, design and evaluation of irrigation methods; irrigation efficiencies.
  • Agricultural Drainage: Drainage coefficient; planning, design and layout of surface and sub-surface drainage systems; leaching requirement and salinity control; irrigation and drainage water quality and reuse; non- conventional drainage system.
  • Groundwater Hydrology: Groundwater occurrence; Darcy’s Law, steady and unsteady flow in confined and unconfined aquifers, groundwater exploration techniques; overview of groundwater recharge estimation and artificial recharge techniques.
  • Wells and Pumps: Types of wells, steady flow through wells; design and construction of water wells; classification of pumps; pump characteristics; pump selection and installation.

Section 6: Agricultural Processing Engineering

Agricultural Engineering deals with the design of farm machinery, the location, and planning of farm structures, farm drainage, soil management, and erosion control, water supply and irrigation, rural electrification, and the processing of farm products. 

  • Engineering properties of agriculture produce: Physical, thermal, frictional, rheological and electrical properties.
  • Evaporation and Drying: Concentration and drying of liquid foods – evaporators, tray, drum and spray dryers; hydrothermal treatments; drying and milling of cereals, pulses and oilseeds; drying kinetics; psychrometry – properties of air-water vapor mixture.
  • Size Reduction and Material Handling: Mechanics and energy requirement in size reduction of agriculture produce; particle size analysis for comminuted solids; size separation by screening; fluidization of granular solids-pneumatic, bucket, screw and belt conveying; cleaning and grading; effectiveness of separation; centrifugal separation of solids, liquids and gases; homogenization; filtration and membrane separation.
  • Processing of Agriculture Produce: Processing of seeds, spices, fruits and vegetables; value addition of agriculture produce.
  • Storage Systems: Controlled and modified atmosphere storage; perishable food storage, godowns, bins and grain silos, packaging material and machines.

Section 7: Dairy and Food Engineering

Food engineering is a multidisciplinary field that combines microbiology, applied physical sciences, chemistry, and engineering for food and related industries. Food engineers provide the technological knowledge transfer essential to the cost-effective production and commercialization of food products and services. 

  • Heat and Mass Transfer: Steady state heat transfer in conduction, convection and radiation; transient heat transfer in simple geometry; working principles of heat exchangers; diffusive and convective mass transfer; simultaneous heat and mass transfer in agricultural processing operations; material and energy balances in food processing systems; water activity, sorption and desorption isotherms.
  • Preservation of Food: Kinetics of microbial death – pasteurization and sterilization of milk and other liquid foods; preservation of food by cooling and freezing; refrigeration and cold storage basics and applications.

Direct Link to Download GATE Agriculture Engineering (AG) Syllabus PDF 

Weightage of Important Topics

Important Topics from GATE 2021 Agriculture Engineering Syllabus

  • Sample Question 1: In a country of 1400 million population, 70% own mobile phones. Among the mobile phone owners, only 294 million access the Internet. Among these Internet users, only half buy goods from e-commerce portals. What is the percentage of these buyers in the country?
  • Sample Question 2: “I read somewhere that in ancient times the prestige of a kingdom depended upon the number of taxes that it was able to levy on its people. It was very much like the prestige of a head-hunter in his own community.”
    Based on the paragraph above, the prestige of a head-hunter depended upon ___________?
  • Sample Question 3: The clean paddy production per annum is 160 million tonnes. Average milling quality analysis indicates the husk content, total yield and degree of polish as 22%, 73.32% and 6%, respectively. For an average bran oil yield of 20%, the annual rice bran oil potential in million tonnes is ________?
  • Sample Question 4: A horizontal axis drag type wind rotor, fitted with 4 thin rectangular blades having drag coefficient 1.29, is used to extract power when the average wind velocity in the rotor plane is 10 km h. The maximum power coefficient is ____?
Important Topics Number of Questions
General Aptitude 10
Engineering Mathematics 10-12
Farm Machinery 10
Soil and Water Conservation Engineering 15
Dairy and Food Engineering 5-8

Read GATE Paper Analysis 

GATE Exam Pattern of AG

GATE 2021 Exam Pattern of Agriculture Engineering

GATE Exam Pattern is defined paper wise depending upon candidates’ branch. 

  • Mode of Examination: Online
  • GATE consists of 3 sections namely General Aptitude, Engineering Mathematics and Specific subject of the paper
  • The total number of questions in the exam is 65.
  • The exam includes 3 types of Questions - Multiple Choice Questions (MCQs), MSQS, & Numerical Answer Type (NAT).
  • Applicants have to attempt all the questions in a duration of three hours.
  • The maximum number of questions in GATE is from the core subject.
  • GATE Syllabus is based on graduation level.
  • For 1 mark MCQs, 1/3 marks will be deducted for every wrong answer. Likewise, for 2 marks MCQs, 2/3 marks will be deducted.
  • There is no negative marking for NAT, MSQs.
Section  Distribution of Marks   Total Marks Types of questions
General Ability 5 questions of 1 mark each
5 questions of 2 marks each
15 marks  MCQs
AG (Subject Syllabus) + Engineering Mathematics 25 questions of 1 mark each
30 questions of 2 marks each 
85 marks MCQs and NATs

Check Detailed GATE Exam Pattern

Best Books for Agriculture Engineering

GATE 2021 Agriculture Engineering Section Wise Books

To know, what are the best books for GATE preparation, you need to know your requirement first. You must choose the book which has all the topics. GIven below section wise books for those candidates who appear for GATE Agriculture Engineering exam:

Books for Engineering Mathematics

Engineering Mathematics books
Books Author/ Publisher
Advanced Engineering Mathematics Dass H.K. S Chand; Reprint Edn
A Mind for Numbers: How to Excel at Math and Science Barbara Oakley TarcherPerigee
A Textbook of Engineering Mathematics N.P. Bali , Laxmi Publications
Modern Mathematical Methods for Physicists and Engineers Cantrell Cambridge University Press

Books for Farm Machinery

Farm Machinery books
Books Author/Publisher
Agricultural Machinery Management Bello R S, LAP Lambert Academic Publishing
The Book of Farm Implements and Machines James Slight
Farm Machinery And Equipment Harris Pearson Smith
Principal Of Agricultural Engg.Vol -I  T P & A M Michael Ojha

Books for Irrigation and Drainage Engineering

GATE soil Engineering Book
Book Name Author ISBN Number
Soil and Water Engineering Delmar D. Fangmeier, William J. Elliot 813151210X, 978-8131512104
Hydrology and Soil Conservation Engineering Ghanshyam Das -
Soil Conservation Service Curve Number (SCS-CN) Methodology S.K. Mishra, Vijay Singh 9048162254, 978-9048162253
Soil and water conservation engineering Richard K. Frevert -

Books for Irrigation and Drainage Engineering

GATE Irrigation drain book
Book Name Author ISBN Number
Irrigation And Drainage LENKA D 8127224596, 978-8127224592
Irrigation Water Resources And Water Power Engineering Modi P.N 8189401297, 978-8189401290
Irrigation Engineering H.M. Raghunath 8126528818, 978-8126528813
Land Drainage: Principles, Methods and Applications A.K. Bhattacharya, A.M. Michael 812592776X, 978-8125927761

Books for Agricultural Processing Engineering

GATE agriculture book
Book Name Author
Question Bank in Agricultural Engineering Amandeep Godhara
Agricultural Engineering Soil Mechanics E. McKyes
Introduction to Agricultural Engineering Technology Harry Field and John Solie
Introduction to Agricultural Engineering lawrenceo. Roth and Harry Field

Books for Dairy and Food Engineering

GATE food engineering book
Book Name Author ISBN Number
Food Science B Srilakshmi 8122438091, 978-8122438093
Fundamentals of Food Process Engineering Romeo T. Toledo 1441939660, 978-1441939661
Obj.Type Questions in Food Process Engg. &Technology Ansari Irfan Ahmed 8183601928, 978-8183601924
Introduction to food engineering R. Paul Singh -

How to Prepare for GATE AG Paper?

How to Prepare for GATE 2021 Agriculture Engineering Paper? 

1. Clear your Basic Concepts

  • Candidates are advised to start their preparation from the base. With the clarity of basic topics or concepts, candidates can easily understand other related topics.
  • Make notes of all the important points for revision.
  • Do not panic if you are not able to crack the questions. Give some time to clear your basics.

Read Preparation Tips from GATE Toppers

2. Attend Video Lectures

  • To get more information on the topics candidates can watch online video lectures. 
  • You can also download e-books for reference.
  • Fix a time in your time table to do the same and do not waste your time by watching n number of videos. Only go for the topic related videos.

3. Section Wise Preparation

  • Candidates must go for section-wise preparation because one section will have all the similar topics so you can easily understand all the same topics at one time.
  • Do not juggle between sections. 
  • Cover all the important and high weightage topics and then move on to the one that is difficult.
  • Candidates can refer to the section-wise books provided above.

4. Practice Papers

  • Practice papers are very helpful for preparations. Solve as many papers as you can.
  • With the help of practice papers, you can judge the level of your preparations.
  • Practice papers give an idea of exam pattern, the difficulty level of questions, etc.
  • Practice papers help in improving accuracy and speed.

Download GATE Practice Papers

5. Do’s & Don’ts during Preparations

  • Do not overburden yourself.
  • Take frequent breaks.
  • Do not try to match the preparation level of your friends. Stick to your preparation plan only.
  • Do not leave any topic for the end. The last 1-2 weeks should be dedicated to revisions only.

GATE Syllabus Of Other Papers

GATE 2021 Syllabus Of Other Papers

Candidates are advised to keep a check on what they have studied and how well. For better preparations start attempting mock tests. They are very helpful in assessing the preparation levels. Try to improve your weaker areas before appearing in the final exam.

*The article might have information for the previous academic years, which will be updated soon subject to the notification issued by the University/College.

GATE 2021 : 44 answered questions


Ques. Can I get a seat in PEC Chandigarh (MTech CSE) with a GATE score of 400 Gen in the CAT?

● Top Answer By Arunima Sethi on 05 May 21

Ans. No, it is not possible to get a seat in PEC Chandigarh for M.Tech CSE at the GATE score of 400, being in General Category.  For Round 1, GATE 2020 opening score for CSE was 402 and the closing score was 523.  While, during Round 2, the score was between 379-395 for the General category.  The total seats for CSE at PEC Chandigarh is also limited. There are only 30 seats available for the program, out of which only 19 are for General candidates. Seeing my friend’s experience there, I would strongly recommend you to re-attempt the exam and score well. Try to get an opportunity in top engineering institutes like IITs/NITs.  It is not that PEC is a worse institute, but if you prepare well and give GATE again, you might land into your dream college. Also, a Master's is usually the last stage of academic learning for all. So, it is better to invest your Master's degree time in an excellent institute.Read more
1 Answer

Ques. Is a stipend available in PEC Chandigarh University through a valid GATE score card?

● Top Answer By Rohini Mishra on 02 May 21

Ans. To put it short, yes, you do get a stipend at the PEC Chandigarh University, but it depends on certain terms and conditions.  Getting an SGPA of at least 6.5 in the semesters is the most important condition. If it is less than required in any semester, your next stipend will not come for the next adjacent half. If you fail to do so in the 1st semester, the stipend for the second semester would be lost.  If you score SGPA more than 6.5 in the second sem, the stipend of third and fourth in the second semester combined will re-continue.  And if you fail to reach 6.5 in the second sem, the stipend of the third and fourth sem will discontinue. As there are no separate examinations for the 3rd and 4th sem to judge the eligibility of stipend.  The stipend for the first semester is received by the students without any conditions, so you need not worry about this, as this depends on your GATE score. Read more
1 Answer

Ques. What do you prefer, the GATE or the IES?

● Top Answer By Keshav Jindal on 25 Feb 21

Ans. I would prefer GATE or IES because in GATE the ratio is 10:1 whereas in IES the ratio is 300:1. This makes IES a very tough competitive exam but in GATE it is easier to get good marks and rank higher as the paper is easy and less competitive compared to IES.  The IES exam is tougher than GATE because here a candidate has to excel both in academics and personality. In GATE the questions are concept based and it is easier to solve if all the concepts are clear. Also in the GATE exam, there are 65 questions and the time limit is 3 hours but in the IES exam there are 120 questions and the time limit is 2 hours. So you get less time to solve all the questions.  After qualifying for your GATE exam with good marks, you can apply to any of the big companies with higher packages and it also opens your gate to apply for PSU.   After qualifying for your IES exam, you will get a job as an assistant executive engineer and after 3-4 years of experience, you will get promoted to executive engineer post. Then after many years of experience of like 20+ years, you will get Chief Engineer posts.Read more
1 Answer

Ques. What is the pattern for the written test for M.Tech at IIT Gandhinagar?

● Top Answer By Kumar Shiwam on 24 Feb 21

Ans. The admission for M. Tech at IIT Gandhinagar is done on the basis of academic records, written test, personal interview, and valid GATE scores. Those students who have a good academic record along with good GATE scores are not supposed to appear in the written test and personal interview.  The pattern of the written test is as follows: 10 questions of General aptitude questions consisting of logical analytical and reasoning ability and engineering mathematics are asked. 15-20 questions are asked related to basic courses in various disciplines up to the third year of an undergraduate program. The total duration of the written test is 1 hour for 80 marks. A total of 40 marks for general aptitude and 40 for basic knowledge. There is a negative marking and very basic questions are asked in the test. For branch subjects, all questions are asked related to SOM, fluid mechanics, etc.  The reservation category will get relaxation in the cut-off marks as per the norms. You will also be entitled to and fro sleeper class train tickets for the shortest route from your hometown to the institute. If you pass the test then you will attend the interview on the same day.Read more
1 Answer

Ques. What are the best coaching centres for GATE and IES in Civil Engineering?

● Top Answer By Sabeer Chalana on 23 Feb 21

Ans. There are many coaching centers throughout the country for IES and GATE coaching. However, these 2 institutes enjoy a huge reputation and recognition at the national level due to their experienced faculty and their study material quality. Made Easy: It is one of the best in the field when it comes to GATE and IES coaching. They have the best faculty teaching the subjects for the students.  Their specialty lies in their high quality and concise presentation. One of my friends enrolled in the Delhi center weekend coaching program, which he claimed to be good. Their online test series is one of the best you can opt for. They are prepared keeping the present pattern in mind. The number of students enrolled is hefty and gives you a clear picture of the competition. Some criticize that their teaching lacks depth compared to other institutes. Their courses and tests require analytical knowledge and are more than enough to crack GATE/IES exams. IES Masters: This institute is one of the best in this field and has earned respect for its excellence and quality coaching within a short span of its inception. All the major subjects for all batches are handled by Mr. Kanchan Thakur who is the director of the institute. He has a brilliant command over all the subjects in Civil engineering. The study material of this institute is best and is even recommended for those who choose civil engineering as an optional subject in UPSC exams. One small setback is that other faculties than the director are not on par when compared with the faculties of Made Easy. For the GATE Online test series, you can opt for Made easy test series, and for the IES test series you can opt for IES Masters. If you plan to join made easy to enroll in Super Talent Batch which has all top faculties teaching in this batch. For Classroom coaching for civil engineering in GATE/IES, Super talent batch can be preferred if not then IES Masters. For Postal study course, one can opt for IES masters.Read more
1 Answer


anuj singh chauhan
Is the syllabus somwhat similar to that of plant biotechnology?
abdul nazir

Hi Anuj, Syllabus for different subject is different and GATE this year offers 27 subjects to choose from. The core section carries maximum weightage and you need to choose subjects for paper 1 and paper 2 of this section. Find more details at GATE 2021 exam pattern.

nafisa khatoon
Can someone with graduation in microbiology appear for agricultural engineering paper?
abdul nazir

Hi Nafisa, Yes you can choose any relevant core subject from the list of 27 subjects available. Certain combination are not allowed for paper 1 and paper 2. To find more details visit GATE 2021 exam pattern.

koyena biswas
Can I get admission in IARI by giving this paper?
abdul nazir

Hi Koyena, No IARI conducts its own entrance test for admission to M.Tech and Ph.D courses. The selection is purely done on the basis of merit in entrance test. Find other details at IARI admissions 2021.

shiya devi
Is the course similar to that of ICAR for PG programs?
abdul nazir

Hi Shiya, GATE is a National level entrance test for admission to several PG level degree courses as well as Ph.D courses. ICAR does not accept GATE score for admissions and they conduct their own entrance test. Find other details at GATE 2021.

sourajit mukherjee
How shall I prepare myself for the exam?
rakhisree chatterjee

Hi GATE Exam Prepartion tips are as follows:

  1. Understanding the GATE syllabus.
  2. Collect important information and resources.
  3. Begin your preparation with dedication.
  4. Make proper revision notes.
  5. Practice tests and Quizzes.
  6. Solve the papers from previous year.
  7. Study only high quality and relevant books.

For more information, please refer, GATE Exam.

dharshini rajendran
How many seats are there for general candidates?
rakhisree chatterjee

Hi, Total number of seats are available in IIT 10957 (approx),and 4944 seats are available for general category students. For more information, please refer, GATE Exam.

shatakshi patki
What is eligibility criteria to give GATE in this subject?
rakhisree chatterjee

Hi, To appear in GATE 2021, the eligibility is relaxed from minimum 10+2+4 (appearing) to minimum 10+2+3 (appearing).  Candidates who are pursuing their-year B.Tech or UG course are also eligible to appear for GATE 2021. For more information, please refer, GATE Exam.

surabhi s
Which college in India is best for this?

HI Surbhi

Visit on our official website of Top Agriculture Engineering Colleges of India to find the best colleges in India. You will get all the other details related to the college.

saurav kumar
Will there be any interview?
rakhisree chatterjee

Hi, It depends on the IIT and the course you're applying for. IITD like IITK conducts interviews for all fields. For more information, please refer, GATE Exam Preparation.

jatin sharma
Can I give GATE if my graduation score is around 60% ?

HI Jatin

There are different eligibility requirment for every degree. You can visit on our official website of GATE Eligibility Criteria to check your criteria and whetehr you can apply for the exam.

sunny pandey
Which unit can help me to score really good marks?

Dear Sunny Pandey

Greetings from Collegedunia. The Core Subject can help you to score good marks in GATE 2021 because it contributes 72% marks out of total marks. For more details, kindly go through this link – GATE 2020 Overview