State Level Exams

TNPSC AAO Vacancy 2026: Apply Online, Selection Process

📅 Updated On 10 October 2026✨ Update By Jyoti Sharma🌐 Hindi & English

TNPSC AAO Free Mock Test

Crack the TNPSC AAO Mock Test 2026 with the help of an online Test series or a free mock test. Every sample paper in the TNPSC AAO Exam has a designated weight, so do not miss out on any paper. Prepare for the TNPSC AAO mock test and check your test scores.

TNPSC AAO Syllabus 2026 and Exam Pattern

TNPSC AAO Syllabus 2026, Exam Pattern, Exam Date 2026

Detail Information about TNPSC has published notification 2026 for the recruitment of Assistant Agriculture Officer vacancies. Those Candidates who are Interested to the following vacancy and completed all Eligibility Criteria can read the Notification & Apply Online. In this page we provide the Complete Syllabus of this Recruitment with Latest Update Exam Pattern and the Exam Date also.

TNPSC Assistant Agriculture Officer Syllabus 2026 - Overview

Conducting Commission	Tamil Nadu Public Service Commission
Name of the Posts	Assistant Agricultural Officer (AAO)
Total Number of Vacancies	110
Mode of the Application Process	Online
Category	Syllabus and Exam Pattern
Official Website	https://www.tnpsc.gov.in/

TNPSC Assistant Agriculture Officer Syllabus 2026

TNPSC AAO Paper-1 :-

Part A: Tamil Eligibility Test (SSLC Standard - 100 Questions) :

அலகு I: இலக்கணம் (25 தகள்விகள்) :

எழுத்து: பிரித்து எழுதுதல் – சேர்த்து எழுதுதல் – ேந்திப்பிழை – குறில், நெடில் சேறுபாடு –லகர, ளகர, ைகர சேறுபாடு – னகர, ணகர சேறுபாடு – ரகர, றகர சேறுபாடு –இனநேழுத்துகள் அறிதல் – சுட்டு எழுத்துகள் – ேினா எழுத்துகள் – ஒருழைப் பன்ழை அறிதல்.
ச ொல்: சேர்ச்நோல் அறிதல் – சேர்ச்நோல்லில் இருந்து ேிழனமுற்று, ேிழனநெச்ேம், ேிழனொலழணயும் நபெர், நபெநரச்ேம் ேழக அறிதல் – அெற்நோல் – தைிழ்ச்நோல், எதிர்ச்நோல் – ேிழனச்நோல் – எழுத்துப் பிழை, ஒற்றுப்பிழை அறிதல் – இரண்டு ேிழனச் நோற்களின் சேறுபாடு அறிதல்.

அலகு II: ச ொல்லகரொதி (15 தகள்விகள்) :

(i) எதிர்ச்நோல்ழல எடுத்நதழுதுதல், ஓநரழுத்து ஒரு நைாைி, உரிெ நபாருழளக் கண்டறிதல்– ஒருநபாருள் தரும் பல நோற்கள், நபாருந்தா நோல்ழலக் கண்டறிதல், அகர ேரிழேப்படி நோற்கழளச் ேீர்நேய்தல்; ஒருநபாருள் பன்நைாைி – இருநபாருள் குறிக்கும் நோற்கள் – சபச்சு ேைக்கு, எழுத்து ேைக்கு – நோல்லும் நபாருளும் அறிதல் – ஒரு நோல்லிற்கு இழணொன சேறு நோல் அறிதல்.

(ii) சகாடிட்ட இடத்தில் ேரிொன நோல்ழலத் சதர்ந்நதடுத்து எழுதுதல் - (எ.கா.) பள்ளிக்குச் நேன்று கல்ேி பெிலுதல் ேிறப்பு (பெிலுதல், எழுதுதல்) - ோனில் முகில் சதான்றினால் ைழை நபாைியும் (முகில், ெட்ேத்திரம்); நபாருத்தைான நபாருழளத் நதரிவு நேய்தல் - (எ.கா.) ஊடகம் - தகேல் நதாடர்புச் ோதனம் (நேய்தி, தகேல் நதாடர்புச் ோதனம்) - ேமூகம் – ைக்கள்
குழு (ைக்கள் குழு, கூட்டம்); ஊர்ப் நபெர்களின் ைரூஉழே எழுதுக - (எ.கா.) புதுச்சேரி –புதுழே, ைன்னார்குடி – ைன்ழன, ைெிலாப்பூர் – ைெிழல; பிழை திருத்துக. (எ.கா.) ஒரு – ஓர்; சபச்சு ேைக்குச் நோற்களுக்கு இழணொன தூெ தைிழ்ச் நோற்கழள இழணத்தல் - (எ.கா.)
நேத்தில – நேற்றிழல, ொக்காலி – ொற்காலி;

(iii) சபச்சு ேைக்குத் நதாடர்களிலுள்ள பிழை திருத்தம் - (எ.கா.) செத்து ைை சபஞ்சுது - செற்று ைழை நபய்தது; நோற்கழள இழணத்துப் புதிெ நோல் உருோக்குதல்: ைற்றும், அல்லது, ஆல், பிறகு, ேழர, இதுவுைல்ல, இருப்பினும், எனினும், இதனால்; அழடப்புக்குள் உள்ள நோல்ழலத் தகுந்த இடத்தில் சேர்த்தல் - (எனசே, ஏநனனில், ஆழகொல், அதுசபால, அதனால், ேழர, பின்பு) - (எ.கா.) ொன் காட்டிற்குச் நேன்சறன். அதனால் புலிழெப் பார்த்சதன்- ைாழலசெரம் முடியும் ேழர ேிழளொடுசேன். சதர்வு முடிந்த பின்பு சுற்றுலா நேல்லலாம்; நபாருள் தரும் ஓர் எழுத்து - (எ.கா.) ஆ-பசு, ஈ-நகாடு, ழத-ைாதம், தீ– நெருப்பு; பல நபாருள் தரும் ஒரு நோல்ழலக் கூறுக - (எ.கா.) கைலம், கஞ்ேம், முளரி, பங்கெம் இச்நோற்கள் தாைழரழெக் குறிக்கும்.

அலகு III: எழுதும் திறன் (15 தகள்விகள்) :

(i) நோற்கழள ஒழுங்குபடுத்திச் நோற்நறாடர் அழைத்தல் – நதாடர் ேழககள் – நேய்ேிழன, நேெப்பாட்டு ேிழன – தன்ேிழன, பிறேிழன – ஒருழைப் பன்ழை பிழைெறிந்து ேரிொன நதாடரறிதல்.

(ii) ைரபுத் தைிழ்: திழண ைரபு - உெர்திழண: அம்ைா ேந்தது – அம்ைா ேந்தாள்; அஃறிழண:

ைாடுகள் ெழனந்தது – ைாடுகள் ெழனந்தன; பால் ைரபு: ஆண்பால்: அேன் ேந்தது – அேன் ேந்தான்; நபண்பால்: அேள் ேந்தது – அேள் ேந்தாள்; பலர் பால்: அேர்கள் ேந்தார்கள் – அேர்கள் ேந்தனர்; ஒன்றன் பால்: அது ேந்தன - அது ேந்தது; பலேின் பால்: பறழேகள் பறந்தனர் – பறழேகள் பறந்தன; காலம்: செற்று ைழை நபய்யும் – செற்று ைழை நபய்தது; செற்று ேருசேன் – செற்று ேந்சதன்; இளழைப் நபெர்: பசு – கன்று; ஆடு – குட்டி; ஒலிைரபு: ொய் கத்திெது – ொய் குழரத்தது; ேிழனைரபு: கூழடமுழட, சோறு உண்; நதாழக ைரபு:ைக்கள் கூட்டம் – ஆட்டு ைந்ழத; ெிறுத்தல் குறிெீடுகள்: கால்புள்ளி, அழரப் புள்ளி, முக்கால் புள்ளி, முற்றுப் புள்ளி, ேிெப்புக் குறி, ேினாக்குறி அழையும் இடங்கள்.

அலகு IV: கலலச் ச ொற்கள் (10 தகள்விகள்) :

பல்துழற ோர்ந்த கழலச் நோற்கழள அதாேது அறிேிெல், கல்ேி, ைருத்துேம், சைலாண்ழை, ேட்டம், புேிெிெல், நதாைில்நுட்பம், ஊடகம், தகேல் நதாைில்நுட்பம் உள்ளிட்ட பல்துழற ோர்ந்த கழலச் நோல்லுக்கு செரான தைிழ்ச் நோற்கழள அறிந்திருக்க சேண்டும். (உதாரணம்: search engine – சதடு நபாறி, ேலழே – Migration, ஒவ்ோழை – Allergy, ைரபணு – Gene, கடல் ழைல் – Nautical Mile)

அலகு V: வொ ித்தல் – புரிந்து சகொள்ளும் திறன் (15 தகள்விகள்) :

நகாடுக்கப்பட்ட பத்திெிலிருந்து சகட்கப்பட்ட ேினாக்களுக்கு ேரிொன ேிழடழெத் சதர்ந்நதடுத்தல் - நேய்தித்தாள் – தழலெங்கம் – முகப்புச் நேய்திகள் – அரசு ோர்ந்த நேய்திகள்–கட்டுழரகள் – இேற்ழற ோேித்தல் - புரிந்து நகாள்ளும் திறன் – உேழைத் நதாடரின் நபாருளறிதல் - ைரபுத் நதாடரின் நபாருளறிதல் – பைநைாைிகள் நபாருளறிதல் – ஆேண உள்ளடக்கங்கழளப் புரிந்து நகாள்ளும் திறன்.

அலகு VI: எளிய சமொழி சபயர்ப்பு (5 தகள்விகள்) :

ஆங்கிலம் ைற்றும் பிறநைாைிச் நோற்களுக்கு இழணொன தைிழ்ச் நோற்கள் அறிதல் சேண்டும் – பென்பாட்டில் உள்ள ஆங்கிலச் நோற்கழள நைாைிநபெர்த்தல் சேண்டும் (ோன்று: pendrive, printer, computer, keyboard) – ஆேணங்களின் தழலப்பு – சகாப்புகள் – கடிதங்கள்– ைனுக்கள் – நைாைிநபெர்ப்பு புரிந்து நகாள்ளுதல்.

அலகு VII: இலக்கியம், தமிழ் அறிஞர்களும், தமிழ்த்சதொண்டும் (15 தகள்விகள்) :

திருக்குறள் நதாடர்பான நேய்திகள் (இருபது அதிகாரங்கள் ைட்டும்) ஒழுக்கமுழடழை, நபாழறயுழடழை, ஊக்கமுழடழை, ேிருந்சதாம்பல், அறன் ேலியுறுத்தல், ஈழக, நபரிொழரத் துழணக்சகாடல், ேிழன நேெல்ேழக, அழேெஞ்ோழை, கண்சணாட்டம்,
அன்புழடழை, கல்ேி, ெடுெிழலழை, கூடா ஒழுக்கம், கல்லாழை, நேங்சகான்ழை, பண்புழடழை, ெட்பாராய்தல், புறங்கூறாழை, அருளுழடழை - சைற்சகாள்கள் - அறநூல் நதாடர்பான நேய்திகள் (ொலடிொர், ொன்ைணிக்கடிழக, பைநைாைி ொனூறு, முதுநைாைிக்காஞ்ேி, திரிகடுகம், இன்னாொற்பது, ேிறுபஞ்ேமூலம், ஏலாதி, அவ்ழேொர் பாடல்கள்) - தைிைின் நதான்ழை, ேிறப்பு, திராேிட நைாைிகள் நதாடர்பான நேய்திகள் - உ.சே.ோைிொத ஐெர், நத.நபா.ைீனாட்ேி சுந்தரம், ேி.இலக்குேனார் தைிழ்ப்பணி நதாடர்பான நேய்திகள் - சதேசெெ பாோணர், அகரமுதலி, பாேலசரறு நபருஞ்ேித்திரனார், ஜி.யு.சபாப், ே ீரைாமுனிேர் தைிழ்த் நதாண்டு நதாடர்பான நேய்திகள் – தைிழ்ச் ோன்சறார் பற்றிெ நேய்திகள்: பாசேந்தர், டி.சக.ேிதம்பரனாதர், தேத்திரு குன்றக்குடி அடிகளார், கண்ணதாேன், காெிசத ைில்லத், தாரா பாரதி, சேலுொச்ேிொர், பட்டுக்சகாட்ழடக் கல்ொணசுந்தரம்,
முடிெரேன், தைிழ் ஒளி, உருத்திரங்கண்ணனார், கி.ோ.ஜகந்ொதர், ொைக்கல் கேிஞர். குறிப்பு: அலகு VII-க்கான பாடத்திட்டம் பத்தாம் ேகுப்பு ேழரெிலான (upto SSLC Standard) பாடப் புத்தகங்கழள அடிப்பழடொகக் நகாண்டது.

Part B: General Studies (SSLC Standard – 75 Questions)

Unit I: General Science (5 Questions) :

Nature of Universe - Measurement of physical quantities - General scientific laws in motion - force, pressure, and energy - Everyday application of the basic principles of mechanics, electricity, magnetism, light, sound, heat, and nuclear physics in our daily life; Elements and compounds, acids, bases, salts petroleum products, fertilizers, pesticides, metallurgy, and food adulterants; main concepts of life science, classification of living organisms, evolution, genetics, physiology, nutrition, health and hygiene, human diseases; Environmental science; Latest inventions in science and technology; Current affairs.

Unit II: Geography (5 Questions) :

Earth location - Physical features - Monsoon, rainfall, weather, and climate - Water resources - Rivers - Soil, Minerals, and Natural resources - Forest and Wildlife - Agriculture pattern; Transport - Communication; Population density and distribution in Tamil Nadu and India; Calamities - Disaster management - Environment - Climate change; Geographical landmarks; Current affairs.

Unit III: History, Culture of India, and Indian National Movement (10 Questions) :

Indus Valley Civilization - Guptas, Delhi Sultans, Mughals, and Marathas – South Indian History; National Renaissance - Early uprising against British Rule - Indian National Congress - Emergence of Leaders - B.R.Ambedkar, Bhagat Singh, Bharathiar, V.O.Chidambaranar, Thanthai Periyar, Jawaharlal Nehru, Rabindranath Tagore, Kamarajar, Mahatma Gandhi, Maulana Abul Kalam Azad, Rajaji, Subhash Chandra Bose, Muthulaksmi Ammaiyar, Muvalur Ramamirtham, and other National Leaders; Different modes of agitation of Tamil Nadu and movements; Characteristics of Indian Culture, Unity in Diversity - Race, Language, Custom; India as a secular state.

Unit IV: Indian Polity (15 Questions) :

Constitution of India - Preamble to the Constitution – Salient features of the Constitution - Union, State, and Union Territory; Citizenship, Fundamental Rights, Fundamental Duties, Directive Principles of State Policy; Union Executive, Union Legislature – State Executive, State Legislature - Local Governments, Panchayat Raj; Spirit of federalism: Centre - State relationships; Election - Judiciary in India - Rule of Law; Corruption in public life - Anti-Corruption measures - Lokpal and Lokayukta – Right to Information - Empowerment of Women - Consumer Protection Forums - Human Rights Charter; Political parties and political system in Tamil Nadu and India; Current affairs.

Unit V: Indian Economy and Development Administration in Tamil Nadu (20 Questions) :

Nature of Indian economy - Five-year plan models - an assessment - Planning Commission and Niti Aayog; Sources of revenue - Reserve Bank of India - Finance Commission - Resource sharing between Union and State Governments - Goods and Services Tax; Economic trends - Employment generation, Land reforms and Agriculture - Application of Science and Technology in Agriculture; Industrial growth - Rural Welfare oriented programmes - Social problems – Population, Education, Health, Employment, Poverty; Social Justice and Social Harmony as the cornerstones of socio-economic development; Education and Health systems in Tamil Nadu; Geography of Tamil Nadu and its impact on economic growth; Welfare schemes of Government; Current socio-economic issues; Current affairs.

Unit VI: History, Culture, Heritage, and Socio-Political Movements of Tamil Nadu (20 Questions) :

History of Tamil Society, related archaeological discoveries - Tamil Literature from Sangam age till contemporary times; Thirukkural - Significance as a Secular Literature - Relevance to everyday life - Impact of Thirukkural on Humanity - Thirukkural and Universal Values – Relevance to Socio-politico-economic affairs - Philosophical content in Thirukkural; Role of Tamil Nadu in freedom struggle - Early agitations against British Rule - Role of women in freedom struggle; Various Social reformers, Social reform movements and Social transformation of Tamil Nadu

Part C: Aptitude and Mental Ability (SSLC Standard – 25 Questions) :-

Unit I: Aptitude (15 Questions) :

Simplification - Percentage - Highest Common Factor (HCF) - Lowest Common Multiple (LCM) - Ratio and Proportion - Simple interest - Compound interest - Area - Volume - Time and Work.

Unit II: Reasoning (10 Questions) : Logical reasoning - Puzzles - Dice - Visual reasoning - Alpha numeric reasoning - Number series.

TNPSC AAO Paper-2 :-

Concerned Subject (Agriculture) :

Unit I: Agronomic Principles, Practices and Meteorology (30 Questions) :

Agriculture – Definition – Branches of agriculture – Classification and status of major crops in Tamil Nadu. Factors affecting crop production. Cropping systems definitions - principles - intercropping - types, Principles and Practices of Agricultural Operations – Tillage definition and types - Intercultural Operations, Implements and Tools inAgriculture – Growth stages and yield prediction. Meteorology – Agricultural Meteorology – Definition - Importance in Crop Production - Atmosphere –Components and its importance – Weather Parameters and their role in Crop Production. Rainfall –Spatial and Temporal Variability in Tamil Nadu across Seasons – Agro Climatic Zones of Tamil Nadu.

Automatic weather stations and its components - Agroadvisory services. Irrigation - water movement in soil – soil moisture constants – available soil moisture - effect of water stress on crop yield – water use efficiency – water requirement of major crops – critical stages of water requirement – irrigation scheduling – types and advantages – Irrigation methods – Micro irrigation – Flagship schemes and policies of Tamil Nadu - Irrigation water use efficiency – management of poor quality irrigation water - soil erosion due to water and control.
Weeds – definition and importance of weed control in crop production – classification of weeds –methods of weed management. Herbicide classification based on mode of action - method of application - common and new herbicides available in the market – weed control practices for major crops – parasitic, problematic and aquatic weed management - integrated weed management – concepts and practices.

Agronomic practices including climatic and soil requirement, land preparation – seeds and sowing –varieties – fertilizer management – irrigation – weed control – harvesting – Production technologies for cereals, millets, pulses, oilseeds, commercial crops, mulberry, forages and green manure crops.

Unit II: Farming system, Dry Farming and Agro-Forestry (10 Questions) :

Integrated farming system – models and components – Schemes of Tamil Nadu. Cropping schemes– Crop calendar of operation of major crops - Dry Farming – Definition and Present Status in Tamil Nadu – Soils of Dry Farming Tracts and their limitation to Crop Production – Major Crops of Dry Land. Suitable Dry Land Technology for increased Crop Productivity – Pre-monsoon sowing – Conventional Crop Production Vs Alternate land Use in Dry Land – Drought and disaster effects and management– crop insurance schemes - Integrated Farming Systems in drylands. Erosion - Classification of Erosion – Soil moisture conservation practices – agronomical, physical and biological methods -Cultivation Practices – Water Harvest – Farm Ponds – Percolation Ponds –Weather aberrations and
Contingent Crop Planning – Watershed development – definition and components. Land use classification – Role of Forests – Agroforestry – Definition and types – Social Forestry, Urban Forestry– Agroforestry Systems - Shifting Cultivation – Alley cropping – Wind Break and Shelter Belts – Agroforestry Practices – Teak, Casuarina, Ailanthus, Neem, Bamboo, and Acacia production and management practices.

Unit III: Soils and Fertility Management (30 Questions) :

Definition of Soil – Its main components – Soils of Tamil Nadu. Soil physical, chemical and biological properties and their significance in crop production. Soil Micro Organisms - Importance of Organic Matter on Soil Properties. Acid, Saline and Alkaline Soils and their reclamation. Soil and water pollutants and management. Irrigation water – Qualities of irrigation water - Water testing. Soil Fertility– Major, Secondary and Minor Plant Nutrients. Soil Fertility evaluation, Soil sampling and testing and fertilizer recommendations – Soil health card. Fertilizers – Nitrogenous, Phosphatic and Potassic Fertilizers – Complex and Mixed Fertilizers, Efficient use of Fertilizers – fertilizer management in major crops. Identification and management of major and minor nutrient deficiency symptoms in plants. Biostimulants – New age fertilizers – Crop Boosters - Remote sensing – GIS and GPS. Bio-Fertilizers– Groups of Bio-Fertilizers – Bacterial, Fungal, Algae and Azolla.

Unit IV: Horticultural Crop Cultivation Techniques (10 Questions)

Status of major horticultural crops in Tamil Nadu – Methods of propagation of major fruit crops - role of growth regulators – Soil and climate requirement - production technologies - nutrient and physiological disorders and its management - post-harvest technologies for Mango, Banana, Grapes, Papaya,
Sapota, Guava, Citrus, Pomegranate, Ber, Annona, Amla, Apple, Pear, Avocado, Dragon fruit, Plum and Pineapple.

Importance of Vegetables – Nutritive Value - Methods of propagation of major vegetable crops - role of growth regulators – Types of Vegetable Garden: Kitchen Garden, Nutritional Garden, Truck Garden, Commercial Garden - Soil and climate requirement - production technologies - nutrient and physiological disorders and its management - post-harvest technologies for Tomato, Brinjal, Chillies, Bhendi, Onion, Cucurbits; Cauliflower, Cabbage, Turnip, potato, beetroot carrot, greens and perennials.

Importance of flower crops – Methods of propagation of major flower crops - role of growth regulators– Soil and climate requirement - production technologies - nutrient and physiological disorders and its management - post-harvest technologies for Jasmine, Rose, Chrysanthemum, Marigold, Tuberose,
Crossandra, Cockscomb.

Garden Design – Formal and Informal Gardens – Components of Garden – Lawns and Lawn Making- Study of Important Flowering Annuals, Flowering and Foliage Shrubs – Flowering and Foliage Trees– Creepers and Climbers – Cacti and Succulents – Indoor Plants and Indoor Decoration – Cut Flowers– Flower arrangement – Bonsai Culture and dry flower decoration.

Importance of aromatic and spices, medicinal and plantation crops – Methods of propagation - role of growth regulators – Soil and climate requirement - production technologies - nutrient and physiological disorders and its management - post-harvest technologies for Spices – Pepper, Cardamom, garlic, Clove, Nutmeg, Cinnamon, Allspice, Turmeric, Ginger, tamarind, Coriander and Fenugreek. Plantation Crops – Coffee, Tea, Coconut, Arecanut, Cashew, Cocoa and Rubber. Medicinal Crops –Coleus, Gloriosa, Ashwagandha, Senna, Keezhanelli, Agave, Thulasi and Achorus. Tissue culture and micropropagation of horticultural crops – Totipotency – Regeneration – Callus culture – Somaclonal variation – hardening of tissue culture plants.

Unit V: Breeding and Seed Production (20 Questions) :

Field Crops – Importance – Classification – Agricultural and Industrial – Chemical Composition of Economic Parts in the Crops & Cereals, Millets, Pulses, Oilseeds, Fibres, Sugar and Starch Crops. Plant Photosynthesis – Respiration – Translocation of Assimilates. Floral biology – Reproductive and Pollination System in Plants – Mechanisms of promoting Self Pollination and Cross Pollination in crop plants – Plant genetic resources – importance – collection – characterization and conservation. Selfing incompatibility and male sterility- application and limitation – male sterility classification – GMS, CMS, CGMS, EGMS, and gametocides.

Breeding Techniques for Self Pollinated Crops – Pure line selection – Mass Selection – Hybridization and Selection – Pedigree Method – Bulk Method – Rice, Black gram, Groundnut. Two and three line breeding in rice. Breeding Techniques for Cross Pollinated and Often Cross Pollinated Crops – Mass Selection, backcross method - Heterosis Breeding – Development of Hybrids. Inbred development. Single Cross – Double Cross and Poly Cross – Use of Male Sterile lines for Hybrid Seed Production– Synthetics and composites for crops like Maize, Cumbu, Redgram, Cotton, sorghum, Castor, Sunflower, Coconut. Breeding Methods for vegetatively propagated crops – Clonal Selection –Hybridization and selection for crops like Sugarcane, Tapioca, Potato and fodder crops. Mutation in crop improvement – Polyploid in Crop Improvement – Inter Specific Hybridization. Importance and success stories. Geographical indications, PPV & FR Act and IPR. Seed – Importance – Seed Quality Characteristics – Classes of Seed – Nucleus, Breeder, Foundation and Certified Seed – Guidelines for Seed Production – Multiplication Ratio – Seed Certification, general certification standards – Field Inspection and Certification – Seed Standards –Pollination and Role of Insects, Environmental and Edaphic Factors. Seed registration - Seed Production Techniques for Varieties and Hybrid in Rice, Maize, millets, Pulses, Cotton, Oilseeds, fodder crops and Important Vegetables: Tomato, Brinjal, Chillies, Bhendi, Lablab, onion and Cucurbits. Harvesting, Processing, Treatment, Storage, Seed Health and Marketing.

Unit VI: Plant Protection Principles and Practices (30 Questions) :

Insects - Definitions – Characters – Economic Classification – Sericulture – Rearing of Mulberry silk worms – Apiculture – Role of Bees in Crop Productivity – Hiving Bees and Apiary Management. Beneficial Insects – Insect Pollinators – Predators and Parasitoids. Pest – Definition – Categories of Pests – Pest outbreak – Pest Monitoring – Pest Surveillance – Forecasting – Economic Threshold Level – Economic Injury Level. Pest Management Components – Cultural, Physical, Mechanical, Legal and Integrated Methods – Use of Resistant Varieties, Biological Control – Parasitoids, Predator and Microbial Agents. Pesticides – Groups, Classification, Mode of Action – Formulation and Uses, Principles of Pesticides application – Hazards in the use of Pesticides and Environmental Pollution – Safe Handling of Pesticides new and organic pesticides – Pesticide residue - Behavior modifying chemicals – Use of Pheromones in pest management and behavioral modifying chemicals; approach. Damage symptoms - life cycle and Integrated management practices of insect and non insect pests of Rice, Millets, Cotton, Sugarcane, Pulses, Oilseeds, Brinjal, Tomato, Bhendi, Cucurbits, Crucifers, Moringa, Tapioca, Chillies, Onion, Coconut, Arecanut, Turmeric, Curry-leaf, Coffee, Tea, Cardamom, Pepper, Betelvine, Flower crops, Mango, Citrus, Banana, Grapes, sapota, Guava, Pomegranate, Pests of stored materials and their management.
Plant diseases – definition, Causes of plant diseases – Fungi, Bacteria, Viruses and Mycoplasma –Categories of plant diseases – Mode of spread – Environmental factors influencing diseases out breaks. Control exclusion – Eradication – Immunization – Protection – Cultural – Methods of Control–Bio control – Economics of the new technologies, Useful fungi – mushroom, cultivation of Oyster mushroom, Trichoderma – utility – Nematodes – Types – Symptoms – Management.
Fungicide – Characteristics – Major groups – Formulation and Applications – Phytotoxicity –Precautions in using fungicides – Antibiotics in plant disease management. Bio technology and its application in disease management – Assessment of crop diseases and losses – Plant Disease Control - Principles - Integrated Pest Management of major diseases caused by Fungi, Bacteria, Virus and Mycoplasma in Cereals, Pulses, Oilseeds, Cash crops – Fruits – Vegetables – Plantation crops– Spices – Flowers and their management.

Unit VII: Livestock, Poultry Management, Artificial Insemination and Calf Rearing (10 Questions) :

Significance and role of livestock and poultry in Indian economy – Various systems of livestock production – extensive – semi intensive – intensive – mixed – Integrated farming systems – Manure management methods – Definition of breed – classification of indigenous, exotic cattle and buffaloes– Breed characteristics of Sindhi, Kangeyam and Umblacherry, Jersey, Holstein Fricsian, Murrah and Surti. Breeding – importance of cross breeding.
Artificial Insemination – merits and demerits – Housing management – farm site selection space requirement for calves, heifer, milch animal and work bullocks – Type and design of house. – Systems of housing – Single row system – Double row system – head to head and tail to tail – merits and demerits – Care and management of new born calf and heifers – Care and management of pregnant, lactating animals and work bullocks. Milk – Definition – clean milk production – methods of milking – hand and machine milking –Processing of milk – cooling Pasteurization – Definition – Various methods – Low Temperature Long
Time and High Temperature Short Time – advantages and disadvantages.
Nutrition – Definition – Ration – Balanced composition of concentrate feed for dairy animal, calf and work bullock – Requirement and importance of green fodder, carrying capacity and forage cycle.
Diseases – classification – Viral, bacterial and metabolic – General control and preventive measures.– Viral Diseases – Foot and mouth – Bacterial diseases – Anthrax, Haemorrhagic septicemia and Black quarter – Metabolic – Tympanites, Ketosis and Milk fever – Mastitis and its control – Zoonotic diseases(Anthrax, Tuberculosis, Brucellosis and Rabies) – Prevention and control.
Sheep and Goat farming – classification of breeds of Indian and exotic origin – Systems of rearing – Housing management – Type design – Floor diagram – Space requirement for adult and young stock–Nutrition – common tree Fodder for small ruminants – Common ailments of sheep and goat – Sheep pox – Foot and Mouth– Blue Tongue – Enterotoxaemia – Ecto and Endo parasites Systems of poultry rearing – Backyard, Intensive systems; Nomenclature of commercial layers and broiler strains – Care and management of day old chicks – Brooder management. Systems of housing – Deep litter and cage systems – merits and demerits – Raised platform housing – Floor space requirement – litter management – care and management of layers and broilers.
Poultry Nutrition – composition of chick mash grower, layer, broiler starter and finisher mashes – Feed Conversion Ratio / dozen eggs or kilogram of meat. Classification of Poultry diseases – Viral –Bacterial – Protozoan – Causative organisms, symptoms, causes and prevention – Viral diseases – Ranikhet disease - Infectious bursal disease - Bacterial disease – E. coli – Coryza – Salmonellosis – Protozoan – Coccidiosis – Vitamin and mineral deficiencies – Schemes, Policies, Subsidies in Animal Husbandry by Tamil Nadu.

Unit VIII: Farm Machinery, Post Harvest Technology and Energy and Environment (10 Questions) :

Thrashing Floor, drying floor. I.C. Engines – Types, Introduction – Preventive maintenance and minor repairs. Tractor – Different systems of a tractor – Hydraulic system – Clutch and Transmission system– Hitching of implements to Tractor – Power Tiller – and matching Implements. Seeders and planters. Plant Protection equipment –Harvesting machinery. Agricultural Pumps – Types of pumps – Custom hiring centre – e-vadagai.
Post Harvest losses in durable and Perishable crops – Moisture content – Methods of Determination– Drying – Sun Drying – Mechanical Drying – Merits and Demerits. Shelling and Decortication –Rubber Roll Sheller – Centrifugal Dehusker. Parboiling of Paddy – Merits and Demerits – Polishing – Milling of Corn and Pulses – Principles and Methods – Seed Treater – Types of Seed Treater. Storage of Grains and Seeds – Condition for safe storage – Value addition and suitable machineries for major food grains.
Energy Resources and Forms of Energy – Conventional and Non - Conventional Energy – Solar Energy – Merits and Limitations - Energy from Bio-Mass – Technologies – Classification and types of Bio-Gas Plants – Bio-Gas from Plant Wastes – Utilization of Bio-gas. Bio Fuel Plant – Gasifiers – Smokeless Chulas.
Ecology – Natural resources – Environmental Pollution and Management – Atmospheric Pollution –Particulate emission by industries and automobiles – Smog – Acid rain – Ozone hole – Global Warming – Causes, Effects and Control measures –Traditional farming methods – Eco-Safe technologies in agriculture.

Unit IX: Commercial Agriculture (20 Questions)

Bio-control agents - Role in pest and disease management – Categories of bio-control agents. Setting up a bio-control laboratory. Mass culture of tobacco caterpillar (Spodoptera litura) and gram pod borer (Helicoverpa armigera)- synthetic diet – mass production of SlNPV and HaNPV. Mass production of Trichogramma spp., Chrysoperla, coccinellid predators, Trichoderma viride, Pseudomonas fluorescens and Entomo-pathogenic nematodes Biofertilizers – Microorganisms for crop nutrition – Types – Sources of good quality strains – Facilities– equipment – and raw materials required – Types and specification of carrier material – production
of azospirillium, azotobacter, Glucano acetobacter, phosphate solubilizer, potash releasing microorganism, PGPR, azolla, BGA, PPFM, and AM fungi – Shelf life and storage of carrier and liquid based biofertilizers – constraints in mass production – storage and preservation – quality standard of commercial biofertilizers – quality control biofertilizer lab in Tamil Nadu.
Mushroom- Morphology: common edible mushrooms - Pleurotus, Calocybe - poisonous mushrooms - Laboratory techniques: sterilization - Media preparation, pure culture techniques, sub-culturing and storage. Spawn: types of spawn, mother spawn and bed spawn. Cultivation: Oyster mushroom, Milky mushroom – Problems in cultivation: Biotic and abiotic disorders - Uses of mushroom: as food, nutraceutical and pharmaceutical values, composting coir-pith and other agro-wastes – Post harvest technology: methods of preservation and value addition. Fruit and Vegetable processing – Equipments and Accessories used in processing – Preparation of
Squash, Syrup, Cordial, Nectar, Ready to serve beverages – Fruit juice concentrate – Paste, Powder, Bar – Jam, Jelly, Marmalade and Candy, Preserve – Pickles – Oil, Salt and vinegar – Tomato products– Ketchup. Sauce, Puree and Paste – Canning of Fruit and Vegetables – Dehydrated Fruit and Vegetables and Re-hydration – Preservation by low temperature – cut-out analysis of canned Fruit and Vegetables – Evaluation of Frozen Fruit and Vegetables – Osmotic dehydration
Seed Production –Selection of field – Maintenance of genetic purity – Removal of offtypes – Isolation distance - Manual emasculation and Pollination - Hybrids – Single cross - double cross – Production of hybrid seed – Varieties – seed production - Use of gametocide – Merits and demerits of hybrids and varieties - Selfing, emasculation and crossing technique in Rice, millets, oilseeds, pulses, Cotton, Tomato, Bhendi – clonal multiplication – Cumbu napier – Seed registration – Field inspection and certification.
Harvesting – Physical and chemical indices – Extraction techniques – Seed processing – Use of cleaner, grader – Seed treatment – Seed packaging – Seed storage – Sanitation – Certification procedure.
Nursery Technology – preparation of land and seed treatment – Sowing and raising of rootstocks (Fruits and Flower Crops) – Application of Liquid Manure and plant protection of rootstock – Potting materials and Preparation of pot mixture – Potting of Rootstock and Hardening - Selection of Scion Plants and Grafting, Aftercare of Grafted Plants, Graft Separation and Hardening – Preparation of Cuttings of Ornamental Plants, Treating the Cuttings with growth regulators and Planting in Mist Chamber in Beds/Polybags, Potting of Rooted Cuttings and Hardening – Air Layering of Ornamental/Fruit Crops – Budding of Ornamental Plants (Rose) – Maintenance of Potted Plants –Packing and Marketing.
Organic composting - Nutrient potential of different organic manures – Preparation of FYM Compost– Composting methods - Preparation of enriched FYM – Coirpith composting – Sugarcane trash –Pressmud - Farm wastes and farm weeds - Parthenium composting – Determination of maturity indices of composts - Commercial utility of organic manures –Introduction to vermicompost – Types of Vermicompost - Materials for vermicomposting. Preliminary treatment of composting material –Small Scale vermicomposting – Large scale vermicomposting – Other types of vermicomposting –Requirements for vermicomposting – Bedding materials, container, pH, Moisture content, Temperature – Cover feed substrates - Selection of right type of worm species – Preparation of vermicompost beds – Collection of Vermicompost – Vermicompost efficiency – Transportation of live worms – Application of vermicompost

Unit X: Agricultural Extension Agricultural Economics and Digital Agriculture (30 Questions) :

Rural Economics and Agricultural Economics – Meaning, importance and scope Sectors of Economy- Importance of agriculture in rural economy: Problems of rural economy – Population growth and its consequences. Agents of production: Land distribution – Size of land holding – Man-Land ratio -
Subdivision and Fragmentation – Land reform – Ceiling on land holding, Tenurial reforms, Consolidation of land holdings Co-operative farming and Bhoodhan movement – Success and failure. Rural labour: Meaning – Classification – Characteristics of rural labour – agricultural labour – Employment, wages and income- Minimum wages Act and other welfare measures. Rural Banking and Finance: Meaning and Concept – Classification and purpose
Sources of finance – Institutional and non-institutional – Government, cooperatives, nationalized commercial banks, regional rural banks and land development banks, private money lenders and other traditional sources – Establishment of NABARD and its role, Multi-agency, Service area approach. Rural industries: Importance and their classification – Investment needs – Generation of employment.
Types of agro-industries – Rural industries project - Khadi and Village Industries Problems of rural industries – Potentials for development of agro- industries from agricultural products and wastes – Sugarcane, Cotton seed, Banana sheath, Forestry products – Rural technologies – Technology gap – Economic and social constraints in the spread of technology. Study of important and recent rural development schemes. Marketing and agricultural marketing – Concepts - definition and scope – Classification of Markets –
Structure – Characteristics of agricultural commodities: Problems in grading and standardization. Marketing costs and marketing margins. Price spread. Advantages and problems.
Cooperative agricultural marketing societies and regulated markets – Role of National Agricultural Cooperative Marketing Federation and TANFED. Role of specialized agencies viz., Food Corporation of India, Central Warehousing Corporation, State Warehousing Corporation in marketing of agricultural commodities and CCI – Role of Regulator Markets – Agmark – e-NAM.
Price support programmes – Buffer stock operations – Role of Commission on Agricultural Costs and Prices – Price stabilization. Agmark grading and commercial grading – Marketing information and intelligence – Marketing of agricultural inputs viz., seeds, fertilizers, plant protection chemicals and
implements.
Sociology – Rural Sociology – Characteristics of rural society. Rural Youth – Their needs and aspirations. Basic rural institutions and voluntary agencies. Leadership – Classification, Characteristics and their influence. Motivation – Methods of Motivation. Social change. Adoption – Meaning, Stages, Adopter categories and their characteristics. Extension methods – Classification –Individual contact - group contact and mass contact methods. Extension aids – Audio aids, Visual aids and Audio Visual aids. Print and Electronic media. Photography, new achievements in communication technology – Transfer of Technologies through demonstrations – Field day –Exhibition – Mass media. Visit to a village – Identifying resources, conducting participatory rural appraisal (PRA), conducting SWOT (strengths, weaknesses, opportunities and threats) analysis and preparing action plan for village development. Visiting farmers – Analysis of farm resources and studying the life style of farmers, earnings, enterprises, expenditure pattern, technical information seeking behavior and dissemination of technologies. Finding the factors of adoption of technologies. Problem diagnosis study – visiting farmers’ fields, identifying technical and frequent problems like soil, pest, disease, disorders and other problems in agriculture, obtaining solutions from known sources and providing them to the farmers. Visiting agro service centers – Studying the business techniques, farmers approach, distribution pattern, dealership pattern, knowing different agro chemicals available in markets and their prices, gaining experience in solving the farmers problems in agro service centers . Visiting daily vegetable wholesale markets – uzhavar sandhai - assessing the price fluctuation and preparing price trend calendar for different vegetables. Preparing line chart for maximum price of
different vegetables grown in the district and identifying optimum sowing period for different
vegetables.

Study the potentialities, prospects and to get clear knowledge about starting agro industries and food processing industries – PMFME – Schemes and policies of Government of Tamil Nadu in Agriculture – Establishment – Farmers group – FPO – Role and Functions.
Application of computer in agriculture - Multimedia Presentation – power point - Internet and E- Mail– Online reporting system – Major Apps and Web Portals (Uzhavan app, Agris net portal,Tamil man valam and latest apps) for improving livelihood of farmers - Application of artificial intelligence and IoT in agriculture.

TNPSC Assistant Agriculture Officer Exam Pattern 2026

Paper	Subject	No.of Question	Marks	Duration
Paper 1	Part-A Tamil Eligibility Test	100	150	3 Hour
	Part-B General Studies	75	150
	Aptitude & Mental Ability	25	150
Paper 2	Concerned Subject (Agriculture)	200	300	3 Hour

Exam Date 2026 : Notified Soon

Starting Date of Application Form : 17th July 2026

Last Date of Application Form : 15th August 2026

Total Post : 110

Click For More Information

TNPSC Assistant Agriculture Officer Exam Free Online Test Series

Crack TNPSC Assistant Agriculture Officer Mock Test 2026 with the help of Online Test Series or Free Mock Test. Every Question Paper in TNPSC Assistant Agriculture Officern Exam has a designated weightage so do not miss out any Paper. Practice for TNPSC AAO Mock Test and check your test scores.

TNPSC Assistant Agriculture Officer Paper 1 Exam - English200 questions • 180 mins • 300 marks

Free Test →

Test Packages Click Here →

TNPSC AAO Exam Free Online Question Bank

TNPSC AAO question answer with solutions are available in Hindi & English. Join MCQ, Important Questions, Question Bank, questions and answers for Free TNPSC AAO exam preparation.

TNPSC Assistant Agriculture Officer Paper 1 Exam - English200 questions • 180 mins • 300 marks

Free Questions →

Combo Offers

TNPSC AAO Combo Packages

We Launches Combo Offers ! with Heavy Discount and Cost Saving Prices. Combo Packages includes - Online Mock Test Series + Important Questions or MCQs + Previous Year Papers with Answer.

Combo Package

TNPSC AAO

Combo - 1 Paper 1 (English)

1. Online Mock Test Series in English = 10 Tests.

2. Question Bank - 1000 Questions with Answer.

3. 1500 (+) Current Affairs MCQ with Answer PDF in English

4. 1000 (+) GK MCQ with Answer PDF Book in English.

₹201~~₹231~~

₹ BUY

Combo Package

A TNPSC AAO mock test from Toppersexam.com is a practice paper based on the latest exam pattern and syllabus, designed to help you assess your preparation level.

You can find and practice free mock tests for the TNPSC AAO exam on the Toppersexam.com portal.

Mock tests are very powerful tool for exam preparation. They help students develop confidence, manage time effectively and improves accuracy to prepare better for TNPSC AAO.

You can find a free online mock test for the TNPSC AAO on toppersexam.com. By taking frequent online mock tests students can monitor there progress and create a study plan according to the needs.

You can take mock test online for TNPSC AAO to know the CBT (computer based test) format of the main exam. You will get latest exam pattern, updated syllabus and type of questions asked in the actual exam.

Mock tests are practice exams to prepare the students for the final one. Taking mock test regularly helps students to improve time management skills and boost confidence.

Students can find a free mock test for TNPSC AAO only at toppersexam. Get free online mock test to experience the actual exam format is important to reduce anxiety and improves your confidence.

Advantages of online mock tests are immediate results, accessibility and time management. Sample papers and mock tests are remarkable tools to track students performance and change your study plan according to your weakness.

Free online mock test can improve your score by making you exam ready before the final exam. It is a excellent way to know the exam pattern and identify your weakness for the TNPSC AAO.

Toppersexam free online mock test are designed by subject experts to provide the best preparation for TNPSC AAO. The questions asked are exactly like the ones which are asked in the actual exam.

Students should practice more and more online mock test for TNPSC AAO to evaluate their performance, detect weaknesses, and improve time management without any cost.

Current affairs and general knowledge mock test are important ways to increase knowledge to stay updated about the recent news and events. Regular practicing with current affairs mock test helps students to prepare better for general awareness section for the final exam.

User Reviews

TNPSC AAO Vacancy 2026: Apply Online, Selection Process

TNPSC AAO Free Mock Test

TNPSC AAO Syllabus 2026 and Exam Pattern

TNPSC AAO Syllabus 2026, Exam Pattern, Exam Date 2026

TNPSC Assistant Agriculture Officer Exam Free Online Test Series

TNPSC AAO Exam Free Online Question Bank

TNPSC AAO Combo Packages

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

Tnpsc Assistant Agriculture Officer 2026 Free Mock Test Frequently Asked Questions (FAQ's)

What learners say

Enter Your Details

TNPSC AAO Vacancy 2026: Apply Online, Selection Process

TNPSC AAO Free Mock Test

TNPSC AAO Syllabus 2026 and Exam Pattern

TNPSC AAO Syllabus 2026, Exam Pattern, Exam Date 2026

TNPSC Assistant Agriculture Officer Exam Free Online Test Series

TNPSC AAO Exam Free Online Question Bank

TNPSC AAO Combo Packages

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

TNPSC AAO

Tnpsc Assistant Agriculture Officer 2026 Free Mock Test Frequently Asked Questions (FAQ's)

What learners say

Enter Your Details

Quick View