RPSC Agriculture Officer & ARO (Agri Chemistry) — 2020 syllabus — subject and topic-wiseRPSC Agriculture Officer & ARO (Agri Chemistry) — 2020 syllabus: 20 subjects, 151 topics. Exam — Conducted by: RPSC; Last held: 17 October 2025. 306 real previous-year questions are classified onto these topics.Updated 31 October 2026 — PYQ counts as of this dateRPSC Agriculture Officer & ARO (Agri Chemistry) — 2020 syllabus — 20 subjects, 151 topics, each with its past-year question count.Soil Science & Agricultural Chemistry — 102 questions

Soil genesis, soil forming factors and processes, soil classification and survey — 26 questions

Soil colloids, clay minerals, ion exchange, cation exchange capacity and electrical double layer — 13 questions

Soil reaction, pH, buffering capacity, redox potential and soil air & temperature — 12 questions

Soil microbiology and biological nitrogen fixation — 7 questions

Plant nutrients - macro and micronutrients, deficiency symptoms and nutrient cycling — 7 questions

Manures and fertilizers - composition, transformation, application and use efficiency — 7 questions

Soil and water conservation, soil erosion and land degradation — 6 questions

Soil water - retention, movement, infiltration, field capacity and wilting point — 6 questions

Problem soils - saline, sodic, saline-sodic and acid soils and their reclamation — 6 questions

Soil chemical analysis methods, reagents and instrumentation — 5 questions

Soil physical properties - texture, structure, bulk and particle density, porosity and consistency — 5 questions

Soil fertility evaluation, soil testing, critical limits and nutrient recommendation — 2 questions

General Knowledge — 72 questions

Physical geography, drainage, climate, soils and vegetation of Rajasthan — 22 questions

Ancient and medieval history of Rajasthan - civilizations, Rajput dynasties and rulers — 10 questions

Modern Rajasthan - 1857, political awakening, Prajamandal and integration — 8 questions

Art, architecture, painting, music, dance and handicrafts of Rajasthan — 8 questions

Natural resources, minerals, energy, irrigation projects and industries of Rajasthan — 8 questions

Population, tribes, tourism, wildlife and environmental conservation of Rajasthan — 8 questions

Rajasthani language, dialects and literature — 4 questions

Fairs, festivals, customs, attire, folk deities, saints and sects of Rajasthan — 3 questions

Polity, administration, schemes and welfare programmes of Rajasthan and India — 1 questions

India and the world - geography, history, polity, science and general knowledge — 0 questions

Current affairs - national, international, sports and awards — 0 questions

Plant Physiology & Biochemistry — 16 questions

Photosynthesis, photorespiration and respiration; C3/C4/CAM plants — 5 questions

Plant growth regulators and physiology of growth and development — 4 questions

Mineral nutrition and physiology of nutrient uptake — 3 questions

Seed development, germination and dormancy — 2 questions

Plant water relations, transpiration, absorption and translocation — 1 questions

Biochemistry of carbohydrates, lipids, proteins, nucleic acids, enzymes and metabolism — 1 questions

Physiology of flowering, photoperiodism and vernalization — 0 questions

Agricultural Economics & Marketing — 15 questions

Basic economics - demand, supply, elasticity, production and cost functions — 12 questions

Farm management, budgeting, cost concepts and project appraisal — 2 questions

Agricultural finance, credit, cooperatives and crop insurance — 1 questions

Agricultural marketing - channels, efficiency, regulated markets, e-NAM and marketable surplus — 0 questions

Agricultural price policy, MSP, subsidies and government schemes — 0 questions

Indian economy, national income, money, banking, public finance and trade — 0 questions

Genetics, Plant Breeding & Seed Technology — 14 questions

Plant biotechnology - tissue culture, molecular markers, transgenics, PCR and genomics — 3 questions

Cell, cell division and cytogenetics; chromosome structure and numerical & structural changes — 2 questions

Molecular genetics - DNA/RNA, gene regulation, operon, replication and protein synthesis — 2 questions

Modes of reproduction, pollination, apomixis, self-incompatibility and male sterility — 2 questions

Crop varieties - release, notification, intellectual property rights and PPV&FR Act — 1 questions

Mendelian genetics, gene interaction, multiple alleles and quantitative inheritance — 1 questions

Linkage, crossing over, gene mapping and cytoplasmic inheritance — 1 questions

Heterosis, inbreeding depression, combining ability and biometrical genetics — 1 questions

Mutation breeding, polyploidy, breeding for biotic & abiotic stress and ideotype concept — 1 questions

Seed technology, seed production, certification standards and Seeds Act — 0 questions

Centres of origin, domestication, introduction, plant genetic resources and germplasm — 0 questions

Breeding methods of self-pollinated, cross-pollinated and vegetatively propagated crops — 0 questions

Horticulture — 14 questions

Production technology of vegetable crops — 4 questions

Floriculture, ornamental gardening and landscaping — 3 questions

Production technology of fruit crops (mango, citrus, banana, guava, grape, ber, date palm, pomegranate) — 2 questions

Seed spices, medicinal and aromatic plants and plantation crops — 2 questions

Training, pruning, growth regulators and physiological disorders of horticultural crops — 2 questions

Fruit and vegetable preservation, processing, food standards and grading — 1 questions

Scope of horticulture, orchard establishment, layout and planting systems — 0 questions

Protected cultivation, hi-tech and dryland horticulture — 0 questions

Plant propagation - cutting, layering, budding, grafting, nursery and micropropagation — 0 questions

Post-harvest management, maturity indices, storage and value addition — 0 questions

Animal Husbandry, Dairy & Poultry — 13 questions

Animal nutrition, feeds and fodder; nutritional disorders — 4 questions

Breeds of cattle, buffalo, sheep, goat and camel — 3 questions

Animal breeding, reproduction and selection methods — 2 questions

Animal health, diseases, vaccination and livestock development programmes — 2 questions

Dairy science, milk composition, processing and milk industry — 1 questions

Poultry production - breeds, hatching, brooding and management — 1 questions

Fisheries and aquaculture — composite fish culture, carps, pond management — 0 questions

Plant Pathology — 13 questions

Mycology - fungal classification, morphology and reproduction — 6 questions

Laboratory techniques, culture media, sterilization, microscopy and edible & poisonous mushrooms — 2 questions

Diseases of cereals, millets and pulses — 2 questions

Bacterial, phytoplasma and viral plant pathogens — 1 questions

Host-pathogen interaction, disease resistance and gene-for-gene concept — 1 questions

Disease management - fungicides, biological control, IDM and quarantine — 1 questions

History, principles and terminology of plant pathology — 0 questions

Nematology and other parasitic agents (parasitic plants, algae) — 0 questions

Diseases of oilseeds, cotton, vegetables, fruits and spices — 0 questions

Plant disease epidemiology, forecasting and disease assessment — 0 questions

Agricultural Engineering — 12 questions

Farm power, tractors, tillage implements and farm machinery — 6 questions

Irrigation engineering - pumps, wells, canals and micro-irrigation design — 5 questions

Surveying, levelling and benchmarks — 1 questions

Soil and water conservation structures, land levelling and drainage engineering — 0 questions

Post-harvest engineering, processing machinery and farm structures — 0 questions

Agricultural Extension Education — 12 questions

Extension programmes and systems in India (T&V, ATMA, KVK, OFT) — 4 questions

Extension teaching methods, audio-visual aids and communication models — 2 questions

Programme planning, monitoring, evaluation, PRA and SWOT analysis — 2 questions

Rural sociology, rural leadership and rural development programmes — 2 questions

Extension education - concepts, principles, history and philosophy — 1 questions

Diffusion and adoption of innovations and adopter categories — 1 questions

Entomology — 10 questions

Insect taxonomy, orders and families; mites and other arthropods — 2 questions

Pests of cereals, millets, pulses and oilseeds — 2 questions

Pests of cotton, sugarcane, vegetables, fruits and stored grain — 2 questions

Insecticides - classification, mode of action, formulation, dosage calculation and toxicology — 2 questions

Beneficial insects - honeybee, silkworm, lac insect, pollinators and their diseases — 1 questions

Integrated pest management, economic threshold level, surveillance, semiochemicals and regulatory acts — 1 questions

Insect morphology, anatomy and physiology — 0 questions

Medical and veterinary entomology — disease vectors and household pests — 0 questions

Insect ecology, behaviour, diapause and insect dominance — 0 questions

Biological control - parasitoids, predators and entomopathogens — 0 questions

Agronomy — 9 questions

Precision agriculture, remote sensing, GIS and agroforestry systems — 2 questions

Agro-climatic and agro-ecological zones of India & Rajasthan, crop adaptation and distribution — 1 questions

Organic farming, integrated nutrient management, green manuring, biofertilizers and sustainable agriculture — 1 questions

Tillage, seedbed preparation, tilth and conservation agriculture — 1 questions

Agronomy of cereals and millets (wheat, rice, maize, barley, pearl millet, sorghum) — 1 questions

Agronomy of commercial, fibre, fodder, sugar and seed-spice crops — 1 questions

Weed biology, classification, herbicides and weed management — 1 questions

Irrigation water management, soil-plant-water relations, irrigation methods and water use efficiency — 1 questions

Dryland and rainfed agriculture, watershed management, moisture conservation and contingency crop planning — 0 questions

Plant population, spacing, crop geometry and yield computation — 0 questions

Agrometeorology, weather elements, growing degree days, monsoon, El Nino and weather forecasting — 0 questions

Cropping patterns, cropping systems, intercropping indices and farming systems — 0 questions

Agronomy of pulses and oilseeds (gram, mustard, groundnut, soybean, sesame) — 0 questions

Statistics — 2 questions

Statistical organisations of India, official and agricultural statistics — 1 questions

Measures of central tendency and dispersion — 1 questions

Collection, classification, tabulation and diagrammatic presentation of data — 0 questions

Non-parametric tests — 0 questions

Design of sample surveys and sampling methods — 0 questions

Design of experiments and analysis of variance — 0 questions

Multivariate analysis (Hotelling's T-square, discriminant analysis, Wishart distribution) — 0 questions

Time series analysis and index numbers — 0 questions

Vital statistics, demography and life tables — 0 questions

Moments, skewness and kurtosis — 0 questions

Correlation and regression — 0 questions

Probability theory, conditional probability, Bayes theorem and mathematical expectation — 0 questions

Discrete and continuous probability distributions — 0 questions

Sampling distributions (chi-square, t, F) and central limit theorem — 0 questions

Theory of estimation and properties of estimators — 0 questions

Testing of hypothesis, Neyman-Pearson lemma and likelihood ratio test — 0 questions

Environment & Ecology — 1 questions

Greenhouse gases, global warming potential and climate change — 1 questions

Ecosystems, food chains, trophic levels and energy flow — 0 questions

Air, water and soil pollution; acid rain; pollution control — 0 questions

Biodiversity, conservation, protected areas and environmental law — 0 questions

Operations Research & Information Technology — 1 questions

Fundamentals of IT, computer applications, spreadsheets and e-governance — 1 questions

Linear programming, simplex method and duality — 0 questions

Transportation and assignment problems — 0 questions

Queuing, inventory, game theory, replacement and network analysis (PERT/CPM) — 0 questions

BOT — 0 questions

Plant morphology — root, stem, leaf, inflorescence, flower — 0 questions

Fruit and seed types, families and plant systematics — 0 questions

HIN — 0 questions

Sandhi and samas — 0 questions

Prefixes, suffixes and word formation — 0 questions

Synonyms, antonyms, polysemous words and word pairs — 0 questions

Spelling, sentence correction and grammar — 0 questions

Idioms and proverbs — 0 questions

One word substitution, technical terminology and translation — 0 questions

MATH — 0 questions

Algebra, theory of equations and matrices (rank, determinant, eigenvalues) — 0 questions

Calculus - limits, continuity, differentiability, mean value theorems and partial differentiation — 0 questions

Integration, rectification, quadrature, volume and surface of revolution — 0 questions

Differential equations - ordinary and partial — 0 questions

Complex analysis - analytic functions, Cauchy theorems, series and singularities — 0 questions

Special functions and integral transforms (Legendre, Bessel, Beta-Gamma, Laplace) — 0 questions

Numerical methods and interpolation — 0 questions

NUTR — 0 questions

Human nutrition, deficiency and food-related disorders — 0 questions

Food processing, preservation, quality standards and adulteration — 0 questions

ZOO — 0 questions

General animal biology — physiology, adaptation and classification — 0 questions

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