TNPSC AHO Syllabus 2023 – Download Assistant Horticultural Officer Exam Pattern @


TNPSC Assistant Horticulture Officer Syllabus PDF Download:

Aspirants, are you looking for TNPSC AHO Syllabus 2023 for your Exam preparation. Here is the right place for your search. TNPSC AHO Syllabus 2023 is available on this article with a detailed Examination Pattern. Please Check out the latest Tamil Nadu PSC AHO Syllabus & Exam Pattern From this page. Tamil Nadu Public Service Commission (TNPSC) is going to conduct TNPSC AHO Exam 2023 to recruit Assistant Horticultural Officers under the Department of Horticulture, Government of Tamil Nadu. So the Candidates who had applied for TNPSC AHO Jobs and Preparing for the Exam are advised to Download the TNPSC AHO Syllabus 2023 in Revised version from here. Here we are providing TNPSC AHO Question Papers. Feel free to download at free of cost.

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Tamil Nadu Public Service Commission (TNPSC) Recruits Assistant Horticultural Officer in a two stage selection procedure. After the Scrutiny of Applications, TNPSC Shortlists Candidates for a Screening test. Candidates who Got Qualified in the Screening Test are Eligible to Appear for an interview. Syllabus is important For every Examination to prepare well and get a Good Score. Here we are providing detailed syllabus for Assistant Horticultural Officer Examination. For more Government jobs in Tamil Nadu, Please Click Here

TNPSC Assistant Horticultural Officer Syllabus 2023 – Details

Name of the Organization Tamilnadu Public Service Commission (TNPSC)
Name of the Post Assistant Horticultural Officer (AHO)
Category AHO Syllabus
AHO Syllabus Status Download Here
Selection Process Written Examination

Oral test/ certificate verification


Official Website

TNPSC Assistant Horticultural Officer Exam pattern

Paper Test Subjects No of Questions Maximum Marks Exam Duration Minimum Qualifying MarksSCs, SC(A)s, STs, MBCs/DCs, BCs and BCM Minimum qualifying Marks Others 
I Horticulture Diploma Standard 200 300 marks 3 hours 150 Marks 200 Marks
II General Studies 75 200 marks 2 hours
Aptitude and Mental Ability 25

TNPSC AAO Syllabus 2023 PDF Download

TNPSC Assistant Horticulture Officer (AHO) Syllabus 2023

Here on this page, we have provided the latest TNPSC AHO Syllabus 2023 PDF. The Officials of Tamilnadu Public Service Commission has released the AHO Syllabus & Exam Pattern on its official website @ here we provide the direct link to Download the TNPSC Syllabus PDF. Click on the below-attached link and Download the Syllabus here for free.

Tamil Nadu PSC AHO Syllabus  2021 for Paper I

TNPSC AHO Syllabus – Horticulture (PG Degree Standard)

  • Principals of Horticulture.
  • Propagation and Nursery Techniques of Horticulture Crops.
  • Growth and Development of Horticultural Crops.
  • Breeding of Horticultural Crops..
  • Production Technology of Fruit Crops.
  • Vegetable  Crops. Production Technology
  • Production Technology of Commercial Flower Crops and Landscaping
  • Spices and Plantation Crops. Production Technology.
  • Production Technology of  Medicinal and Aromatic Crops.
  • Post-Harvest Technology of Horticulture Crops.

TNPSC AHO Syllabus 2023 – Horticulture (Degree Standard)

  • Fundamentals of Horticulture.
  • Growth and Development of Horticultural Crops.
  • Propagation of Horticulture Crops
  • Management Techniques for Horticulture Crops.
  • Production Technology of Fruit Crops.

TNPSC AHO Syllabus 2023 – Horticulture (Diploma Standard)


Horticulture – Definition, scope and importance, Division and classification of horticultural crops – Horticultural zones in India and Tamil Nadu – Cropping systems – Planting methods – Irrigation systems – Nutrient application methods in horticultural crops – Weed management – Training – Pruning, ringing, notching, disbudding and pinching – Crop regulation – Physical and chemical regulation – Special practices –Maturity indices – Harvesting methods, pre-cooling – Packaging – Storage of horticultural crops – Protected cultivation.

Propagation – Tools and implements – Media – Containers – Propagation – Preparation of nursery beds – Seed treatment – Sowing – Plug transplants / seedling production – Potting, depotting and repotting of plants – Methods of asexual propagation through cuttings, layering, grafting and budding – Types of cuttings – Types of layering – Potting of layers and hardening – Raising of rootstocks – Grafting methods – Separation of grafts – Potting and maintenance of grafted plants plant propagating structures – Mist chamber – Shade net – Uses – Hardening and maintenance – Application of growth regulators – Growth regulators for seed and vegetative propagation – Budding methods – Maintenance of budded plants – Nutrition and plant protection.


Soil – Definition – Components – Physical properties of soil – Colour, Texture, structure, Bulk density, Particle density, Pore space; soil water, soil air, soil temperature and their significance in crop production. Soil chemical properties – Soil reaction, EC and CEC. Soil Organic Matter and its importance on soil properties – Essential nutrients for crop plants – Major, secondary and micro nutrients – Manures and fertilizers – Types – Straight, Complex, Compound, Mixed, Fortified and chelated fertilizers and their reactions in soil – Techniques to enhance fertilizer use efficiently. Soil fertility – INM and IPNS – Problem soils – Acid, saline and alkaline soils – Their formation, reclamation and management.

Irrigation – Sources of water for irrigation – Water movement, soil–plant and atmosphere 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 – Irrigation water use efficiency – Management of poor quality irrigation water. Weeds – definition and importance of weed control in crop production – Classification of weeds – Methods of weed control – Manual, mechanical, cultural, chemical and biological methods – Relative merits and demerits – Herbicide classification based on method of application – Weed control practices for major horticultural crops – Parasitic, problematic, aquatic and waste land weed management – Integrated weed management – Concepts and practices.


Scope and importance of fruit cultivation – Area and production of fruit crops in Tamil Nadu – Selection and layout of orchard – Physical features in orchard – Study of cultural practices of Tropical fruits – Mango, Banana, Grapes, Papaya, Sapota, Guava, Jackfruit – Sub- tropical and temperate fruits – Pineapple, Avocado, Apple, Pear, with reference to soil, climate, varieties / hybrids methods of propagation, nutrient, irrigation and weed management practices – Training and pruning – Growth regulators – Maturity standards forharvesting – Post-harvest handling of fruit crops – Yield – Grading – packing – Storage and value added products – Organic fruit production and Good Agricultural Practices. Dry land horticulture – Importance, scope and distribution of arid and semi arid zones in India and Tamil Nadu.

Crops suitable for dry land production – Important varieties, climate and soil requirements, commercial propagation methods – Spacing and planting systems – Cropping systems and intercropping – Mulching – Soil and moisture conservation methods – Anti-transpirants – Management of nutrients, water, weeds and problem soils – Regulation of cropping – Training and pruning – Top working and rejuvenation – Use of plant growth regulators – Post-harvest handling. Scope and importance of vegetable cultivation – Area and production in Tamil Nadu – Systems of vegetable cultivation – Kitchen garden – Truck garden and market garden – Gardening for processing.

Climate – Soil requirement – Varieties / hybrids – Seed rate – Sowing nursery practices – Protray nursery – Transplanting – Manuring – Irrigation – Fertigation – Nutrient deficiency and their corrective measures – Weeding –chemical – Mechanical weed control – Use of growth regulators – Special horticultural practices (training, staking, pruning) – Physiological disorders and corrective measures – Maturity indices – Harvesting – Grading, sorting – Packing and storage and yield for important vegetable crop; Tomato, Brinjal, Chillies, Bhendi, Onion, Gourds – Bitter gourd – Ridge gourd – Snake gourd – Pumpkin – Water melon – Musk melon – Ash gourd -Tapioca –Yams – Colocasia – Cabbage – Cauliflower, Radish – Carrot Beet root, Amaranthus – Moringa – Potato – Cluster beans – Lab lab – Peas and Beans.


Scope and importance of commercial flower crops – Area and production – Study of cultural practices of commercial loose flowers – Rose, Jasmine, Tuberose, Chrysanthemum, Marigold, Crossandra, Celosia, Nerium and Gomphrena. Floral concrete, pigment and dye extraction from loose flowers – Introduction to protected structures for cut flower production –– Study of cut flower production techniques of Rose, Carnation, Gerbera, Chrysanthemum, Orchids, Anthurium, Gladiolus, Lilium, Alstroemeria and Heliconia. Post-harvest management of cut flowers – Floral decorations, bouquets and dry flowers – Grading, packing and marketing of flowers. Scope and importance of ornamental gardening and landscaping – Principles – Styles of garden – Formal and informal garden – Features of garden – Garden components and adornments – Plant Components – Edges, hedges, flower beds, trophy, topiary, mixed borders – Non-plant components – Garden walls, fencing, steps, garden drives and paths, pavements, fountains, arches, pergolas, trellises, pools, etc. – operations in maintenance of trees, annuals, shrubs, climbers, creepers, herbaceous perennials, ferns, cacti and succulents, palms and cycads – Sunken garden, roof garden, rockeries. Operations in planting and maintenance of public garden, institutional garden, Industrial garden, residential complex garden – Operations in landscape maintenance for high ways, bus terminus, airports, city roads and IT parks – Lawn – Types of lawn grasses – Criteria for selection- methods of lawn establishment – Operation and maintenance – Problems and remedial management – Flower arrangements and dry flowers – Suitable plant selection and methods of arrangement.


Scope and importance of spices – Area and production and productivity in Tamil Nadu – Study of cultural practices for the important spice crops Pepper, Cardamom, Turmeric, Ginger, Clove, Nutmeg, Cinnamon, Tamarind, Allspice, Curry leaf, Coriander, Fenugreek, Fennel, Cumin and Paprika with reference to soil, climate, varieties, propagation, planting – Irrigation – Nutrition and weed management – Cultural practices – Training and pruning – Harvesting – Yield – Post-harvest handling: Processing – grading and packing – Organic farming and GAP in spice production. Scope and importance of plantation crops – Area – Production and productivity in Tamil Nadu – Study of cultural operations for the plantation crops Tea, Coffee, Rubber, Cocoa, Cashew, Coconut, Arecanut, Oil palm and Palmyrah with reference to soil, climate, varieties, propagation, cultural practices – Training and pruning – Harvesting – Yield – Processing – Grading and packing. Medicinal and aromatic plants – Scope and importance – Medicinal plant wealth of India and Tamil Nadu – Area and production – Classification – Annual, biennial and herbaceous perennial – Medicinal and aromatic plants for tropical, sub–tropical and temperate region – Contract farming and Good Agricultural Practices – Soil and climatic – conditions, propagation and planting, irrigation, manuring, weed control, economic parts, harvesting, yield, post-harvest handling, curing and processing practices, storage methods of medicinal plants: Glory lily, Medicinal Coleus, Senna, Periwinkle, Gymnema, Ashwagandha, Phyllanthus, Kalmegh, Aloe vera and Stevia – Aromatic plants: Japanesemint, Rosemary, Lemon grass, Citronella, Palmarosa, Vetiver, Geranium, Patchouli, Sacred and sweet basil.


Pest – Categories – Causes for pest for outbreak. Pest management – Principles and components. Natural enemies in pest suppression. IPM – Management strategies for important insect pests groups – Chewing insects – Stem borers – Fruit borer – Sap feeders of important fruit, vegetable, spices, medicinal and plantation crops- Special pest management strategies in ware house, green house, poly house. Management techniques for plant parasitic nematodes. Etiology, symptoms and integrated management of important diseases due to fungi, bacteria, viruses, phytoplasma, phanerogamic parasites of Fruits: Mango, Banana, Citrus, Grapes, Guava, Sapota, Pomegranate, Papaya, Jack, Pineapple, Ber, Apple, Pear, Plum

Vegetables: Brinjal, Tomato, Bhendi, chilies Cucurbits, Crucifers, Beans, Peas, Potato, Sweet potato, Radish and Cassava. Mushroom: Cultivation techniques of and Pleurotus, Agaricus, Calocybe and Volvariella Spices and condiments: Onion, Garlic, Chillies, Cardamom, Pepper, Turmeric, Ginger, Betelvine, Coriander, Fenugreek, Clove and Nutmeg Plantation crops: Tea, Coffee, Cocoa, Rubber, Ccoconut Arecanut and Cashew Flowers : Jasmine, Rose, Crossandra, Chrysanthemum, Tube rose, Carnation, Medicinal plants: Gloriosa, Stevia, Senna, Coleus, Aloe vera, Solanum nigrum and Withania.


Scope and importance of post harvest technology in horticultural crops – Washing, grading, sorting – pre cooling and pre treatments – Blanching & peeling methods – Post-harvest handling methods: Dehydration, Canning of fruits and vegetables – Thermal processing – Low temperature processing – Cold storage – Controlled and atmospheric storage – refrigeration truck, ripening chamber, packaging for horticultural crops – Value addition in horticultural crops : Definition – Need for value addition. General principles and method for value added products – Processing of value added products: Processing of fruits – Jam, Jelly, Squash, RTS and Candy. Processing of vegetables – Pickle, chutney, sauce and ketchup.Processing of spices – Spice powders and masala mix – Food safety standards: Principles National – Agmark, BIS, FSSAI, HACCP International – Codex, ISO.


Significance of Livestock and Poultry in Indian economy- Various systems of livestock production – Livestock and Poultry census and its role on national Gross Domestic Product – Special and common nomenclatures used in Animal Husbandry practices – Breeds – Classification – White and Black cattle breeds – Breed characteristics of Sindhi, Kangayam, Umblacherry, Jersey, Holstein Friesian, Murrah and Surti – Signs of estrus cycle- Artificial Insemination – Housing management – Selection of site-space requirement – Calf and adult stock – Care and management of new born – heifer – Milch cattle and work bullocks – Clean milk production – Nutrition –Ration – Balanced ration – Desirable characteristics of ration – Classification of feeds and fodder – Concentrate and Roughage’s – Composition and Requirement of ration for young and adult stock – Green fodder requirement and importance – Diseases – Classification – Viral – Foot and Mouth – Bacterial – Anthrax – Haemorrhagic septicemia – Black Quarters – Metabolic – Milk fever – Ketosis – Tympanites – Causative organism – Transmission – Symptoms – Control and Prevention – Farm Records – Record keeping – Insurance – Selection and culling of livestock. Sheep and Goat farming – Classification of breeds – Exotic and indigenous – Nomenclature – Economic traits – Systems of rearing – Housing management – Care and management of young and adult stock – Nutrition – Common diseases – Sheep pox -Foot and Mouth – Blue Tongue – Enterotoxaemia – Ecto and endo parasites – Prevention and Control. Poultry farming – Classification of breeds – Commercial strains of layer and broiler – Housing management – Brooding management – Deep litter – Cage system – Nutrition of Chick – Grower and Layer and Broiler – Diseases – Classification – Viral – Ranikhet – Infectious Bursal Disease – Bacterial – E.coli-Coryza – Salmonellosis – Protozoan – Coccidiosis – Causative organisms – Symptoms – Vaccination – Disease control and Prevention.


Hybrid Seed Production – Hybrids – Production of hybrid varieties – Development of inbreeds – Single cross evaluation – Prediction of double cross performance – Production of hybrid seed –Cytoplasmic, Genetic male sterility – Maintenance of Male sterile lines – Production of single cross hybrids – Production of double cross hybrid varieties – Manual emasculation and / or Pollination – Chemically induced male sterility – Merits and demerits of hybrid varieties – Floral biology, anthesis, pollination, selfing, emasculation and crossing technique in Rice, Sorghum, Pearl millet, Red gram, Castor, Sunflower, Cotton, Tomato, Bhendi – Harvesting – Physical and chemical indices – Extraction techniques – Seed processing – Use of cleaner, grader – Seed treatment – Seed packaging – Seed storage – Sanitation – Certification procedure. Production of Bio-Control Agents – Introduction to bio-control agents – Importance – History and development – Classical examples of 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 (Spodopteralitura) and gram pod borer (Helicoverpaarmigera) – Synthetic diet – Mass production of SlNPV and HaNPV. Mass production of Trichogramma spp., Chrysoperla, coccinellid predators, Trichodermaviride, Pseudomonas fluorescens and Entomo-pathogenic nematodes. Production of Spawn and Mushroom – Mushroom – Introduction, importance -Present production and trade, scope for export, markets for mushroom and mushroom products – Mushroom morphology: Common edible mushrooms – Pleurotus, Calocybe – Poisonous mushrooms – Laboratory techniques: Equipments used, sterilization of glassware, 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: Weed moulds, diseases, pests and abiotic disorders – Uses of mushroom : as food, nutriceutical and pharmaceutical values, composting coir-pith and other agro-wastes – Post-harvest technology: methods of preservation and value addition.

Organic Composting – Agricultural, Industrial and Urban wastes – 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 – Visit to compost yard. 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.


Farm Management – Scope – Relationship with other sciences – Economic principles applied to the organization of farm business – Principles of variable proportions – Farm planning and Budgeting – Types and system of farming – Farm planning – Meaning – Need for farm planning -Types of Farm plans – Simple farm plan and whole farm plan – Characteristics of a good farm plan – Basic steps in farm planning – Farm budgeting – Meaning – Types of farm budgets – Enterprise budgeting – Partial budgeting and whole farm budgeting – Farm Risk Management – Distinction between risk and uncertainty – Sources of risk and uncertainty – Production and technical risks – Price risk – Financial risk – Methods of reducing risks – Horticultural Marketing – Nature and Scope – Concepts and definition of marketing – Scope of agricultural marketing -Classification of markets – Structure, conduct – Performance – Market forces – Demand and supply – Characteristics of agricultural commodities – Marketing costs and marketing margins – Price spread. Marketed and marketable surplus – Marketing Functions and Institutions – Marketing functions – Packaging – Transportation – Grading and standardization – Warehousing – Processing – Cold storage – Marketing agencies and institutions – Cooperative marketing societies – Role of regulated markets – NAFED – TANFED – NHB – Commodity boards – Marketing of agricultural inputs – Market information and intelligence – AGMARKNET, DEMIC, DMI etc., – Usage of market information. Agricultural Extension – Scope, principles – Teaching Learning Process. Communication – Meaning, definition, elements and their characteristics, types, models and barriers in communication. Diffusion – Elements – Adoption – Stages, adopter categories and their characteristics. Extension methods – Definition, classification – Individual contact, group contact and mass contact methods. Participatory Rural Appraisal techniques. Audio – Visual aids – Definition, advantages, classification, choice, criteria for selection. Farm Journalism – Definition, basic concepts, writing for media. Information and Communication Technology (ICT) – Computer networks, internet, video conferencing, agriportals, Kisan Call Centre, mobile phone. Photography – Basic concepts, advancements.

TNPSC Assistant Horticulture Officer Syllabus 2023 for Papers II

TNPSC AHO Syllabus 2023 – General Studies

Unit-I: General Science

Physics: Nature of Universe-General Scientific laws-Inventions and discoveries-National scientific laboratories-Mechanics and properties of matter-Physical quantities, standards and units-Force, motion and energy-Magnetism, electricity and electronics -Heat, light and sound. Chemistry-Elements and Compounds-Acids, bases and salts-Fertilizers, pesticides, insecticides.

Botany-Main Concepts of life science-Classification of living organism-Nutrition and dietetics- Respiration.

Zoology- Blood and blood circulation-Reproductive system-Environment, ecology, health and hygiene-Human diseases including communicable and non – communicable diseases – prevention and remedies-Animals, plants and human life.

Unit-II: Current events

History-Latest diary of events-national – National symbols – Profile of States-Eminent persons & places in news-Sports & games-Books & authors – Awards & honors’-India and its neighbours
= Political Science-1. Problems in conduct of public elections-2. Political parties and political system in India-3. Public awareness & General administration-4. Welfare oriented govt. schemes, their utility Geography–Geographical landmarks- Economics– Current socio-economic problems Science-Latest inventions on science & technology

Unit-III: Geography

Earth and Universe-Solar system-Monsoon, rainfall, weather & climate-Water resources — rivers in India-Soil, minerals & natural resources-Forest & wildlife-Agricultural pattern-Transport including surface transport & communication-Social geography – population-density and distribution-Natural calamities – Disaster Management.

Unit-IV: History and Culture of India and Tamil Nadu
Indus valley civilization-Guptas, Delhi Sultans, Mughals and Marathas-Age of Vijayanagaram and the bahmanis-South Indian history-Culture and Heritage of Tamil people-India since independence- Characteristics of Indian culture-Unity in diversity –race, colour, language, custom-India-as secular state-Growth of rationalist, Dravidian movement in TN-Political parties and populist schemes.

Unit-V: Indian Polity

Constitution of India–Preamble to the constitution- Salient features of constitution- Union, state and territory- Citizenship-rights amend duties- Fundamental rights- Fundamental duties- Human rights charter- Union legislature – Parliament- State executive- State Legislature – assembly- Local government – panchayat raj – Tamil Nadu- Judiciary in India – Rule of law/Due process of law- Elections- Official language and Schedule-VIII- Corruption in public life- Anti-corruption measures – CVC, Lok-adalats, Ombudsman, CAG – Right to information- Empowerment of women- Consumer protection forms.

TNPSC AHO Syllabus 2023 – Aptitude & Mental Ability

  • Conversion of information to data
  • Collection, compilation and presentation of data
  • Tables, graphs, diagram
  • Parametric representation of data Analytical interpretation of Data
  • Simplification
  • Percentage
  • Highest Common Factor (HCF)
  • Lowest Common Multiple (LCM)
  • Ratio and Proportion
  • Simple interest
  • Compound interest
  • Area-Volume-Time and Work-Behavioural ability
  • Basic terms
  • Communications in information technology
  • Application of Information and Communication Technology (ICT) Decision making and problem solving
  • Logical Reasoning
  • Puzzles-Dice-Visual Reasoning
  • Alphanumeric
  • Reasoning
  • Number Series
  • Logical Number/Alphabetical/Diagrammatic Sequences

Click Here to Download TNPSC AHO Syllabus 2023 PDF