{"id":9665,"date":"2026-04-08T20:30:47","date_gmt":"2026-04-08T15:00:47","guid":{"rendered":"https:\/\/vajiramandravi.com\/upsc-exam\/?p=9665"},"modified":"2026-04-10T12:07:07","modified_gmt":"2026-04-10T06:37:07","slug":"ifos-syllabus","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/upsc-exam\/ifos-syllabus\/","title":{"rendered":"Indian Forest Service Syllabus 2026, Exam Pattern, Download PDF"},"content":{"rendered":"

The Indian Forest Service Notification 2026 by the Union Public Service Commission (UPSC) includes the IFoS Syllabus 2026 for the Indian Forest Service Exam. It is essential for candidates to go through UPSC IFS Syllabus 2026 and prepare based on the most recent UPSC IFS Exam Pattern 2026. The Indian Forest Service Prelims consists of two papers, while the Indian Forest Service Mains comprises six papers.<\/span><\/p>\r\n

Indian Forest Service Syllabus 2026<\/b><\/h2>\r\n

For those aspiring candidates to join the Indian Forest Service (IFS), a thorough understanding of the UPSC IFS Syllabus 2026 and the exam pattern is essential. Having a clear understanding of the syllabus allows candidates to identify the various subject areas covered in the IFS Exam 2026. An extensive review of the Indian Forest Service Syllabus 2026 will provide candidates with valuable insights into the topics that will be included in the exam.<\/span><\/p>\r\n

Indian Forest Service Syllabus 2026 for Prelims<\/b><\/h2>\r\n

The Indian Forest Service Syllabus 2026 for Prelims includes two papers; Paper 1 General Studies I and Paper 2 General Studies II, also known as CSAT. The first paper is conducted to\u00a0 evaluate candidates\u2019 general knowledge, such as current affairs; the second paper examines the candidate\u2019s aptitude for forest service. The UPSC IFS Syllabus 2026 for Prelims is as follows:<\/span><\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Indian Forest Service Syllabus 2026 for Prelims<\/b><\/td>\r\n<\/tr>\r\n
\r\n

Paper\u00a0<\/span><\/p>\r\n<\/td>\r\n

\r\n

Topics<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n

\r\n

General Studies\u00a0<\/span><\/p>\r\n<\/td>\r\n

\r\n
    \r\n\t
  1. Current Affairs: Events of national and international importance.<\/span><\/li>\r\n\t
  2. Geography of India and World: Physical, Economic, and Social Geography of India and the World.<\/span><\/li>\r\n\t
  3. History: India History and Indian National Movement.<\/span><\/li>\r\n\t
  4. Economic and Social Development: Social Sector Initiatives, Inclusion, Sustainable Development, Poverty, Demographics, etc.<\/span><\/li>\r\n\t
  5. Indian Polity and Governance: Constitution of India, Political System, Panchayati Raj, Rights Issues, Public Policy, etc.<\/span><\/li>\r\n\t
  6. Environment and Science: General issues on Environmental ecology, Climate Change, and Biodiversity.<\/span><\/li>\r\n\t
  7. General Science<\/span><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n
\r\n

CSAT<\/span><\/p>\r\n<\/td>\r\n

\r\n
    \r\n\t
  1. Reading Comprehension: English, Interpersonal skills including communication skills<\/span><\/li>\r\n\t
  2. Reasoning: Logical reasoning and analytical ability, decision-making, and problem-solving.<\/span><\/li>\r\n\t
  3. General Mental Ability: Class X level topics on basic numeracy (numbers and their relations, orders of magnitude, etc.)\u00a0<\/span><\/li>\r\n\t
  4. Data Interpretation: Class X level charts, tables, graphs, data sufficiency, etc.<\/span><\/li>\r\n<\/ol>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

    UPSC IFS Exam Pattern 2026 for Prelims<\/b><\/h2>\r\n

    The UPSC Indian Forest Service (IFS) Prelims 2026 serves as a preliminary screening test where candidates will be evaluated based on their performance in two objective-type papers. There will be two papers, each lasting 2 hours, consisting of multiple-choice questions (MCQs). It is important to note that the scores from this stage will not contribute to the final merit list. To be considered for advancement, candidates must secure at least 33% in Paper 2. The UPSC IFS Exam Pattern 2026 for Prelims is as follows:<\/span><\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n
    UPSC IFS Exam Pattern 2026 for Prelims<\/b><\/td>\r\n<\/tr>\r\n
    \r\n

    Paper<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    Total Questions<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    Total Marks<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    Negative Marking<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n

    \r\n

    General Studies Paper I<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    100<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    200<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    -0.66 marks<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n

    \r\n

    General Studies Paper II (CSAT)<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    80<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    200<\/span><\/p>\r\n<\/td>\r\n

    		\r\n

    -0.83 marks\u00a0<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

    Indian Forest Service Syllabus 2026 for Mains<\/b><\/h2>\r\n

    Every candidate aspiring to succeed in the Indian Forest Service Exam 2026 must understand the IFoS Syllabus 2026 for mains as it plays a crucial role during selection based on the marks obtained. The UPSC IFS Mains Exam 2026 consists of six papers, of which four are optional. Candidates are required to select two subjects from the optional papers.<\/span><\/p>\r\n

    The compulsory papers include:<\/span><\/p>\r\n

      \r\n\t
    • General English<\/span><\/li>\r\n\t
    • General Knowledge<\/span><\/li>\r\n<\/ul>\r\n

      Candidates are mandated to attempt these papers without any options for subject selection. The detailed topics included in the syllabus for the compulsory papers are outlined in the table below.<\/span><\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n
      UPSC IFS Syllabus 2026 for Compulsory Papers<\/b><\/td>\r\n<\/tr>\r\n
      \r\n

      Subject\u00a0<\/span><\/p>\r\n<\/td>\r\n

      		\r\n

      Topics<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n

      \r\n

      General English<\/span><\/p>\r\n<\/td>\r\n

      		\r\n
        \r\n\t
      • One Essay in English<\/span><\/li>\r\n\t
      • Other questions will be designed to test candidates\u2019s understanding of English and workmanlike use of words.\u00a0<\/span><\/li>\r\n\t
      • Passages will usually be set for summary or precis.\u00a0<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
      \r\n

      General Knowledge<\/span><\/p>\r\n<\/td>\r\n

      		\r\n
        \r\n\t
      • General Knowledge including knowledge of current events and of such matters as may be expected of an educated person who has not made a special study of any scientific subject.\u00a0<\/span><\/li>\r\n\t
      • The paper will also include questions on the following subjects:<\/span>\r\n
          \r\n\t
        1. Indian Polity including the political system<\/span><\/li>\r\n\t
        2. Constitution of India<\/span><\/li>\r\n\t
        3. History of India<\/span><\/li>\r\n\t
        4. Geography\u00a0<\/span><\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n

          UPSC IFS Syllabus 2026 for Optional Subjects<\/b><\/h3>\r\n

          In the UPSC Indian Forest Service Mains Exam 2026, candidates must choose two optional subjects from a list of 14. Each optional subject paper has two parts: Part A and Part B. Each part contains four questions, making a total of eight questions for each subject. For those preparing for the Indian Forest Service Exam 2026, it's important to review the UPSC IFS Syllabus 2026 for Optional Subjects to understand what to expect and how to prepare effectively.<\/span><\/p>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
          UPSC IFS Syllabus 2026 for Optional Subjects<\/b><\/td>\r\n<\/tr>\r\n
          \r\n

          Subject\u00a0<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Topics<\/span><\/p>\r\n<\/td>\r\n<\/tr>\r\n

          \r\n

          Agriculture<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Ecology<\/span><\/li>\r\n\t
          • Cropping patterns and related topics<\/span><\/li>\r\n\t
          • Forestry plantations<\/span><\/li>\r\n\t
          • Soil<\/span><\/li>\r\n\t
          • Farm management<\/span><\/li>\r\n\t
          • Agricultural extension, etc.\u00a0<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Cell Theory<\/span><\/li>\r\n\t
            • Cytoplasmic inheritance<\/span><\/li>\r\n\t
            • Seed technology<\/span><\/li>\r\n\t
            • Physiology<\/span><\/li>\r\n\t
            • Growth and development<\/span><\/li>\r\n\t
            • Pests and diseases<\/span><\/li>\r\n\t
            • Food production<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Animal Husbandry & Veterinary Science<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Animal Nutrition<\/span><\/li>\r\n\t
          • Animal Physiology<\/span><\/li>\r\n\t
          • Livestock Production and Management<\/span><\/li>\r\n\t
          • Genetics and Animal Breeding<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Health and Hygiene<\/span><\/li>\r\n\t
            • Veterinary Public Health<\/span><\/li>\r\n\t
            • Animal Diseases<\/span><\/li>\r\n\t
            • Milk and Milk Products Technology<\/span><\/li>\r\n\t
            • Meat Hygiene and Technology<\/span><\/li>\r\n\t
            • Extension<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Chemistry<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Atomic structure<\/span><\/li>\r\n\t
          • Chemical bonding<\/span><\/li>\r\n\t
          • Solid State<\/span><\/li>\r\n\t
          • The gaseous state<\/span><\/li>\r\n\t
          • Thermodynamics and statistical thermodynamics<\/span><\/li>\r\n\t
          • Phase equilibria and solutions<\/span><\/li>\r\n\t
          • Electrochemistry<\/span><\/li>\r\n\t
          • Chemical kinetics<\/span><\/li>\r\n\t
          • Photochemistry\u00a0<\/span><\/li>\r\n\t
          • Surface phenomena and catalysis<\/span><\/li>\r\n\t
          • Bio-inorganic chemistry\u00a0<\/span><\/li>\r\n\t
          • Coordination chemistry<\/span><\/li>\r\n\t
          • General chemistry of \u2018f\u2019 block elements<\/span><\/li>\r\n\t
          • Non-Aqueous Solvents<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Delocalised covalent bonding<\/span><\/li>\r\n\t
            • Pericyclic reactions<\/span><\/li>\r\n\t
            • Reactions<\/span><\/li>\r\n\t
            • Chemistry and mechanism of reactions\u00a0<\/span><\/li>\r\n\t
            • Polymeric Systems<\/span><\/li>\r\n\t
            • Synthetic uses of reagents\u00a0<\/span><\/li>\r\n\t
            • Photochemistry<\/span><\/li>\r\n\t
            • Principles of spectroscopy and applications in structure elucidation<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Agricultural Engineering<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Soil and Water Conservation<\/span><\/li>\r\n\t
          • Aerial Photography and Remote Sensing<\/span><\/li>\r\n\t
          • Irrigation and Drainage<\/span><\/li>\r\n\t
          • Agricultural Structures\u00a0<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Farm Power and Machinery<\/span><\/li>\r\n\t
            • Agro-energy<\/span><\/li>\r\n\t
            • Agricultural Process Engineering<\/span><\/li>\r\n\t
            • Instrumentation and Computer Applications in Agricultural Engineering\u00a0<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Botany<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Microbiology and Plant Pathology<\/span><\/li>\r\n\t
          • Cryptogams<\/span><\/li>\r\n\t
          • Phanerogams<\/span><\/li>\r\n\t
          • Plant Utility and Exploitation<\/span><\/li>\r\n\t
          • Morphogenesis<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Cell Biology<\/span><\/li>\r\n\t
            • Genetics, Molecular Biology and Evolution<\/span><\/li>\r\n\t
            • Plant Breeding, Biotechnology and Biostatistics<\/span><\/li>\r\n\t
            • Physiology and Biochemistry<\/span><\/li>\r\n\t
            • Ecology and Plant Geography<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Civil Engineering<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Strength of materials<\/span><\/li>\r\n\t
          • Structural analysis<\/span><\/li>\r\n\t
          • Engineering Mechanics\u00a0<\/span><\/li>\r\n\t
          • Structural Steel Design<\/span><\/li>\r\n\t
          • Design of Concrete and Masonry Structures\u00a0<\/span><\/li>\r\n\t
          • Fluid Mechanics, Open channel flow, and Hydraulic Mechanics\u00a0<\/span><\/li>\r\n\t
          • Hydraulic Machine and Hydropower<\/span><\/li>\r\n\t
          • Geotechnical engineering<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Construction Technology<\/span><\/li>\r\n\t
            • Construction Equipment<\/span><\/li>\r\n\t
            • Survey and Transport Engineering<\/span><\/li>\r\n\t
            • Hydrology, Water Resources, and Engineering<\/span><\/li>\r\n\t
            • Environmental Engineering<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Chemical Engineering<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Fluid and Particle Dynamics<\/span><\/li>\r\n\t
          • Mass Transfer\u00a0<\/span><\/li>\r\n\t
          • Heat Transfer<\/span><\/li>\r\n\t
          • Noval Separation Processes<\/span><\/li>\r\n\t
          • Process Equipment Design<\/span><\/li>\r\n\t
          • Process Dynamics and Control<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Material and Energy Balances<\/span><\/li>\r\n\t
            • Chemical Engineering Thermodynamics<\/span><\/li>\r\n\t
            • Chemical Reaction Engineering<\/span><\/li>\r\n\t
            • Chemical Technology\u00a0<\/span><\/li>\r\n\t
            • Environmental Engineering and Safety<\/span><\/li>\r\n\t
            • Process Engineering Economics<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Forestry<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Silviculture<\/span><\/li>\r\n\t
          • Agroforestry, Social Forestry, Joint Forest Management and Tribology\u00a0<\/span><\/li>\r\n\t
          • Forest Soils, Soil Conservation and Watershed management\u00a0<\/span><\/li>\r\n\t
          • Environmental Conservation and Biodiversity<\/span><\/li>\r\n\t
          • Tree Improvement and Seed Technology<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Forest Management and Management Systems<\/span><\/li>\r\n\t
            • Forest Working Plan<\/span><\/li>\r\n\t
            • Forest Mensuration and Remote<\/span><\/li>\r\n\t
            • Sensing<\/span><\/li>\r\n\t
            • Surveying and Forest Engineering<\/span><\/li>\r\n\t
            • Forest Resources and Utilization<\/span><\/li>\r\n\t
            • Forest Ecology and Ethnobotany<\/span><\/li>\r\n\t
            • Forest Protection & Wildlife Biology<\/span><\/li>\r\n\t
            • Forest Economics and Legislation<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Mathematics<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Linear Algebra\u00a0<\/span><\/li>\r\n\t
          • Calculus\u00a0<\/span><\/li>\r\n\t
          • Analytic Geometry<\/span><\/li>\r\n\t
          • Dynamics, Statics, and Hydrostatics<\/span><\/li>\r\n\t
          • Vector Analysis<\/span><\/li>\r\n\t
          • Ordinary Differential Equations<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Algebra<\/span><\/li>\r\n\t
            • Real Analysis<\/span><\/li>\r\n\t
            • Complex Analysis<\/span><\/li>\r\n\t
            • Linear Programming<\/span><\/li>\r\n\t
            • Partial differential equations<\/span><\/li>\r\n\t
            • Numerical Analysis and Computer programming<\/span><\/li>\r\n\t
            • Numerical integration<\/span><\/li>\r\n\t
            • Numerical solution of ordinary differential equations<\/span><\/li>\r\n\t
            • Computer Programming<\/span><\/li>\r\n\t
            • Mechanics and Fluid Dynamics<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Mechanical Engineering<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Theory of Machines<\/span><\/li>\r\n\t
          • Mechanics of Solids<\/span><\/li>\r\n\t
          • Engineering Materials<\/span><\/li>\r\n\t
          • Manufacturing Science<\/span><\/li>\r\n\t
          • Manufacturing Management<\/span><\/li>\r\n\t
          • Elements of Computation<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Thermodynamics<\/span><\/li>\r\n\t
            • I.C. Engines, Fuels and Combustion<\/span><\/li>\r\n\t
            • Heat Transfer, Refrigeration and Air Conditioning<\/span><\/li>\r\n\t
            • Turbomachine and Powerplants<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Physics<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Classical Mechanics<\/span><\/li>\r\n\t
          • Special Relativity, Waves & Geometrical Optics<\/span><\/li>\r\n\t
          • Physical Optics<\/span><\/li>\r\n\t
          • Electricity and Magnetism<\/span><\/li>\r\n\t
          • Electromagnetic Theory & Black Body Radiation<\/span><\/li>\r\n\t
          • Thermal and Statistical Physics<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Quantum Mechanics I<\/span><\/li>\r\n\t
            • Quantum Mechanics II & Atomic Physics<\/span><\/li>\r\n\t
            • Molecular Physics<\/span><\/li>\r\n\t
            • Nuclear Physics<\/span><\/li>\r\n\t
            • Particle Physics & Solid State Physics<\/span><\/li>\r\n\t
            • Electronics<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Zoology<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Non-Chordata and Chordata<\/span><\/li>\r\n\t
          • Ecology<\/span><\/li>\r\n\t
          • Ethology<\/span><\/li>\r\n\t
          • Economic Zoology<\/span><\/li>\r\n\t
          • Biostatistics<\/span><\/li>\r\n\t
          • Instrumental Methods<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Cell Biology<\/span><\/li>\r\n\t
            • Genetics<\/span><\/li>\r\n\t
            • Evolution\u00a0<\/span><\/li>\r\n\t
            • Systematics<\/span><\/li>\r\n\t
            • Biochemistry\u00a0<\/span><\/li>\r\n\t
            • Physiology<\/span><\/li>\r\n\t
            • Developmental Biology<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Statistics<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n

            \r\n\t
          • Probability<\/span><\/li>\r\n\t
          • Statistical Inference<\/span><\/li>\r\n\t
          • Linear Inference and Multivariate Analysis<\/span><\/li>\r\n\t
          • Sampling Theory and Design of Experiments<\/span><\/li>\r\n<\/ul>\r\n

            Paper II:<\/span><\/p>\r\n

              \r\n\t
            • Industrial Statistics<\/span><\/li>\r\n\t
            • Optimization Techniques<\/span><\/li>\r\n\t
            • Quantitative Economics and Official Statistics<\/span><\/li>\r\n\t
            • Demography and Psychometry<\/span><\/li>\r\n<\/ul>\r\n<\/td>\r\n<\/tr>\r\n
          \r\n

          Geology<\/span><\/p>\r\n<\/td>\r\n

          		\r\n

          Paper I:<\/span><\/p>\r\n