A ASRB ARS Soil Science 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.
New Vacancy 2026
ASRB ARS Soil Science 2026 Notification, Online Form & Exam Date
ASRB ARS Soil Science Vacancy 2026 provides a golden opportunity for aspirants seeking stable government jobs. Interested candidates can apply online for the posts after verifying the official eligibility criteria, age limit, and educational qualifications. Ensure you track the application deadlines and stay updated with the latest ASRB ARS Soil Science 2026 recruitment news for a smooth registration process.
To crack the ASRB ARS Soil Science 2026 exam, understanding the detailed syllabus and exam pattern is mandatory. Aspirants should focus on strategic planning and rigorous time management for each selection phase. Boosting your speed through online mock tests and regular practice is the key to securing a high score in this competitive recruitment. For premium study material and practice sets, follow the expert curated resources on toppersexam.com.
To crack the ASRB ARS Soil Science 2026 exam, understanding the detailed syllabus and exam pattern is mandatory. Aspirants should focus on strategic planning and rigorous time management for each selection phase. Boosting your speed through online mock tests and regular practice is the key to securing a high score in this competitive recruitment. For premium study material and practice sets, follow the expert curated resources on toppersexam.com.
ASRB ARS Soil Science Free Mock Test
Crack the ASRB ARS Soil Science Mock Test 2026 with the help of an online Test series or a free mock test. Every sample paper in the ASRB ARS Soil Science Exam has a designated weight, so do not miss out on any paper. Prepare for the ASRB ARS Soil Science mock test and check your test scores.
ASRB ARS (Soil Science) Syllabus 2026, Exam Pattern
ASRB ARS (Soil Science) Syllabus 2026, Exam Pattern, Exam Date 2026
Detail Information about ASRB has published notification 2026 for the recruitment of Agriculture Research Service (Soil Science) 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.
ASRB ARS Notification 2026 - Overview
| Organization Name | Agricultural Scientists Recruitment Board (ASRB) |
| Exam Name | Agricultural Research Service (ARS) Examination 2026 |
| Post Name | Soil Science |
| No.of Posts | Notified Soon |
| Mains Exam Date 2026 | Notified Soon |
| Mode of Application | Online |
| Selection Process | Prelims, Mains and Interview |
| Category | Syllabus and Exam Pattern |
| Official Website | www.asrb.org.in |
ASRB ARS (Soil Science) Syllabus 2026
Soil Science :
Unit 1: Soil genesis, classification, survey and land use planning :
Concept of land, soil and soil science. Composition of earth crust and its relationship with soils; Rocks, minerals and other soil forming materials; Weathering of rocks and minerals; Factors of soil formation; Pedogenic processes and their relationships with soil properties; Soil development; Pedon, polypedon, soil profile, horizons and their nomenclature. Soil Taxonomy - epipedons, diagnostic subsurface horizons and other diagnostic characteristics, soil moisture and temperature regimes, categories and criteria for soil classification systems. Soil mineralogy and clay mineralsclassification, structure, compostion, properties, genesis, transformation and identification techniques, role in plant nutrition, interaction with humus, pesticide and heavy metals. Interpretation of soil survey data for land capability and crop suitability classifications, Macromorphological study of soils. Land evaluation and land use type concept and application. Application and use of global positioning system for soil survey. Soil survey- types, techniques. Soil series- characterization and procedure for establishing soil series, benchmark soils, major soils of India and soil correlations. Study of base maps: cadastral maps, toposheets, aerial photographs and satellite imageries. Use of geographical information system for preparing thematic maps.
Unit 2: Soil Physics :
Soil physical constraints affecting crop production. Soil texture - textural classes. Soil structure -classification, soil aggregation and significance, soil consistency, soil crusting, bulk density and particle density of soils and porosity, their significance and manipulation. Soil water- retention and potentials. Soil moisture constants. Movement of soil water - infiltration, percolation, permeability, drainage and methods of determination of soil moisture. Darcy's law. Thermal properties of soils, soil temperature, Soil air- composition, gaseous exchange, influence of soil temperature and air on plant growth. Soil erosion by water, wind - types, effects, mechanics. Rain erosivity and soil erodibility. Runoff - methods of measurement, factors and management, runoff farming. Soil conservation measures, soil conservation in special problem areas Characterization and evaluation of soil and land quality indicators; Causes of land degradation; Management of soil physical properties for prevention /restoration of land degradation; Identification, monitoring and management of waste lands; Land use- land cover mapping and land use planning using conventional and remote sensing techniques; Concept of watershed - its characterization and management. Remote sensing and geographic information system in precision farming.
Unit 3: Soil Chemistry :
Chemical composition of soil; Soil colloids - structure, composition, constitution of clay minerals, amorphous clays and other non-crystalline silicate minerals, oxide and hydroxide minerals; crystallography, space lattice, coordination theory; solubility and ionic products: computation and mineral formation, Charge development on clays and organic matter; pH- charge relations; Buffer capacity of soils. Soil organic matter fractions, clay organic interaction. Elements of equilibrium thermodynamics, chemical equilibria, electrochemistry and chemical kinetics. Inorganic and organic colloids- surface charge characteristics, diffuse double layer theories, zeta potential stability, coagulation/ flocculation, peptization, electrometric and sorption properties of soil colloid. Soil organic matter- fractionation, clay-organic interactions. Cation exchange- theories, adsorption isotherms, Donnan-membrane equilibrium concept, clay-membrane electrodes and ionic activity measurement, thermodynamics, anion and ligand exchange- inner sphere and outer-sphere surface complex formation, fixation of oxyanions, hysteresis, sorptiondesorption of oxy-anions and anions. Nitrogen, potassium, phosphate and ammonium fixation in soils and management aspects. Quantity/intensity relationship and nutrient availability. Chemistry of acid, salt-affected soil, Chemistry and electrochemistry of submerged soils and management aspects, geochemistry of micronutrients,. Basics of radioisotopes-radioactivity, monitoring radiation and isotopic techniques.
Unit 4: Soil Fertility :
Essential elements in plant nutrition; Nutrient cycles in soil; Transformation and transport of nutrients (Macro and micro nutrients) in soil; Manures and fertilizers; Fate and reactions of fertilizers in soils; Chemistry of production of different fertilizers; Slow release fertilizers and nitrification retarders; Quality control of fertilizers. Soil fertility evaluation - soil testing, plant and tissue tests and biological methods; Common soil test methods for fertilizer recommendation; Soil test-crop response correlations; Integrated nutrient management; Use of isotopic tracers in soil research; Nature, properties and development of acid, acid sulphate, saline and alkali and their management; Lime and gypsum requirements of soils, lime potential; Irrigation water quality - EC, SAR, RSC and specifications. Fertility status of major soil groups of India. Concept and application of soil health and soil quality. Pollution: types, causes, methods of measurement, standards and management. Heavy metal toxicity and soil pollution; Chemical and bio-remediation of contaminated soils; Soil factors in emission of greenhouse gases; Carbon sequestration in mitigating greenhouse effect; Radio-active contamination of soil.
Unit 5: Soil Microbiology :
Soil biota, soil microbial ecology, types of organisms. Soil microbial biomass, microbial interactions, unculturable soil biota. Microbiology and biochemistry of root-soil interface Phyllosphere. Soil enzymes, origin n, activities and importance. Soil characteristics influencing growth and activity of microflora. Microbial transformations of N, P, K, S, Fe and Zn in soil. Biochemical composition and biodegradation of soil organic matter and crop residues. Humus formation. Cycles of important organic nutrients, microbial transformations of pollutants in soil. Soil genomics; xenobiotics; Biodegradation of pesticides, organic wastes and their use for production of biogas and manures. Biofertilizers - definition, classification, specifications, method of production and role in crop production.
Unit 6: Analytical chemistry in soil :
Concept of chemical analysis, Solution reactions, titrimetric analysis, concept of standard solution, Indicators: theory and applications. Methods of soil analysis - particle size distribution, bulk and Particle density, moisture constants, Modern methods of soil, plant and fertilizer analysis Flame photometry and inductively coupled plasma optical emission spectroscopy; Spectrophotometry - visible, ultra-violet and infrared; Atomic absorption spectrophotometry; Potentiometry and conductimetry; X-ray diffractometry; Mass spectrometry; Geiger Muller counter, solid and liquids scintillation counters.
Unit 7: Statistics :
Experimental designs for pot culture and field experiments; Analysis of Variance (ANOVA) and Covariance; Statistical measures of central tendency and dispersion; Correlation and regression; Tests of significance - t and F' tests; Computer use in soil research.
ASRB ARS (Soil Science) Exam Pattern 2026
Preliminary Exam
Duration : 120 Minutes
Negative Marking : 0.33
Mains Exam (Descriptive)
Mains Exam Date 2026 : Notified Soon
Starting Date of Application Form : Notified Soon
Last Date of Application Form : Notified Soon
Duration : 120 Minutes
Negative Marking : 0.33
| S.No | Subject | No.of Question | Marks |
| 1. | Soil Science | 150 | 150 |
| Total | 150 | 150 |
Mains Exam (Descriptive)
| S.No | Subject | Marks | Duration |
| 1. | Soil Science | 200 | 03 Hour |
| Total | 200 | 03 Hour |
Mains Exam Date 2026 : Notified Soon
Starting Date of Application Form : Notified Soon
Last Date of Application Form : Notified Soon
ASRB ARS (Soil Science) Exam Free Online Test Series
Crack ASRB ARS (Soil Science) exam 2026 with the help of Online Mock test Series or Free Mock Test. Every Sample Paper in ASRB Agricultural Research Service Exam has a designated weightage so do not miss out any Paper. Preprare and Practice Mock for ASRB Agricultural Research Service exam and check your test scores.
ASRB ARS Soil Science Exam Free Online Question Bank
ASRB ARS Soil Science question answer with solutions are available in Hindi & English. Join MCQ, Important Questions, Question Bank, questions and answers for Free ASRB ARS Soil Science exam preparation.
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Combo Package
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Subjectwise / Sectional Mock Test - MCQs / Important Questions & Previous Year Papers
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View →FAQs
Asrb Ars (soil Science) 2026 Free Mock Test Frequently Asked Questions (FAQ's)
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