IFS Syllabus 2025, Download PDF For IFS Prelims And Mains

IFS Syllabus 2025: The Indian Forest Service (IFS) Examination is conducted by the Union Public Service Commission (UPSC) to recruit officers for forestry services in India. The IFS Syllabus 2025 has been released along with the official notification. Aspirants preparing for the IFS 2025 Exam should be well-versed with the syllabus and exam pattern to ensure thorough preparation. Here we have provided a detailed breakdown of the IFS Prelims and Mains Syllabus, including an overview and subject-wise topics.

IFS Syllabus 2025 Overview

The Indian Forest Service Examination (IFS) consists of three stages:

Preliminary Examination (Prelims): Conducted along with the Civil Services Examination (CSE), it serves as a screening test.
Mains Examination (Mains): Includes written tests in specific subjects related to forestry and environmental sciences.
Interview (Personality Test): The final selection stage, assessing the candidate’s suitability for the IFS role.

IFS Syllabus 2025 Download PDF

IFS Prelims Syllabus 2025

The IFS Prelims Exam consists of two papers, Paper 1 General Studies I and Paper 2 General Studies II, also known as CSAT, that are common with the Civil Services Examination (CSE). The syllabus is as follows:

UPSC IFS Syllabus 2025 – Prelims
Paper	Topics
General Studies	Current Affairs: Events of national and international importance. Geography of India and World: Physical, Economic, and Social Geography of India and the World. History: India History and Indian National Movement. Economic and Social Development: Social Sector Initiatives, Inclusion, Sustainable Development, Poverty, Demographics, etc. Indian Polity and Governance: Constitution of India, Political System, Panchayati Raj, Rights Issues, Public Policy, etc. Environment and Science: General issues on Environmental ecology, Climate Change, and Biodiversity. General Science
CSAT	Reading Comprehension: English, Interpersonal skills including communication skills Reasoning: Logical reasoning and analytical ability, decision-making, and problem-solving. General Mental Ability: Class X level topics on basic numeracy (numbers and their relations, orders of magnitude, etc.) Data Interpretation: Class X level charts, tables, graphs, data sufficiency, etc.

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IFS Mains Syllabus 2025

The IFS Mains Exam consists of six papers, including 2 compulsory papers and 4 optional subjects. Below is the detailed syllabus for each paper:

UPSC IFS Syllabus 2025 – Compulsory Subjects

Candidates appearing for IFS mains have to give these two compulsory papers along with the optional papers chosen by them. The topics covered in the UPSC IFS syllabus for compulsory papers are provided in the table below:

UPSC IFS Syllabus 2025 – Compulsory Papers
Subject	Topics
General English	One Essay in English Other questions will be designed to test candidates’ understanding of English and workmanlike use of words. Passages will usually be set for summary or precis.
General Knowledge	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. The paper will also include questions on the following subjects: Indian Polity including the political system Constitution of India History of India Geography

UPSC IFS Syllabus 2025 – Optional Subjects

Candidates must choose two optional subjects, each having two papers (200 marks each). The available subjects are:

UPSC IFS Syllabus 2025 – Optional Subjects
Subject	Topics
Agriculture	Paper I: Ecology Cropping patterns and related topics Forestry plantations Soil Farm management Agricultural extension, etc. Paper II: Cell Theory Cytoplasmic inheritance Seed technology Physiology Growth and development Pests and diseases Food production
Animal Husbandry & Veterinary Science	Paper I: Animal Nutrition Animal Physiology Livestock Production and Management Genetics and Animal Breeding Paper II: Health and Hygiene Veterinary Public Health Animal Diseases Milk and Milk Products Technology Meat Hygiene and Technology Extension
Chemistry	Paper I: Atomic structure Chemical bonding Solid State The gaseous state Thermodynamics and statistical thermodynamics Phase equilibria and solutions Electrochemistry Chemical kinetics Photochemistry Surface phenomena and catalysis Bio-inorganic chemistry Coordination chemistry General chemistry of ‘f’ block elements Non-Aqueous Solvents Paper II: Delocalised covalent bonding Pericyclic reactions Reactions Chemistry and mechanism of reactions Polymeric Systems Synthetic uses of reagents Photochemistry Principles of spectroscopy and applications in structure elucidation
Agricultural Engineering	Paper I: Soil and Water Conservation Aerial Photography and Remote Sensing Irrigation and Drainage Agricultural Structures Paper II: Farm Power and Machinery Agro-energy Agricultural Process Engineering Instrumentation and Computer Applications in Agricultural Engineering
Botany	Paper I: Microbiology and Plant Pathology Cryptogams Phanerogams Plant Utility and Exploitation Morphogenesis Paper II: Cell Biology Genetics, Molecular Biology and Evolution Plant Breeding, Biotechnology and Biostatistics Physiology and Biochemistry Ecology and Plant Geography
Civil Engineering	Paper I: Strength of materials Structural analysis Engineering Mechanics Structural Steel Design Design of Concrete and Masonry Structures Fluid Mechanics, Open channel flow, and Hydraulic Mechanics Hydraulic Machine and Hydropower Geotechnical engineering Paper II: Construction Technology Construction Equipment Survey and Transport Engineering Hydrology, Water Resources, and Engineering Environmental Engineering
Chemical Engineering	Paper I: Fluid and Particle Dynamics Mass Transfer Heat Transfer Noval Separation Processes Process Equipment Design Process Dynamics and Control Paper II: Material and Energy Balances Chemical Engineering Thermodynamics Chemical Reaction Engineering Chemical Technology Environmental Engineering and Safety Process Engineering Economics
Forestry	Paper I: Silviculture Agroforestry, Social Forestry, Joint Forest Management and Tribology Forest Soils, Soil Conservation and Watershed management Environmental Conservation and Biodiversity Tree Improvement and Seed Technology Paper II: Forest Management and Management Systems Forest Working Plan Forest Mensuration and Remote Sensing Surveying and Forest Engineering Forest Resources and Utilization Forest Ecology and Ethnobotany Forest Protection & Wildlife Biology Forest Economics and Legislation
Mathematics	Paper I: Linear Algebra Calculus Analytic Geometry Dynamics, Statics, and Hydrostatics Vector Analysis Ordinary Differential Equations Paper II: Algebra Real Analysis Complex Analysis Linear Programming Partial differential equations Numerical Analysis and Computer programming Numerical integration Numerical solution of ordinary differential equations Computer Programming Mechanics and Fluid Dynamics
Mechanical Engineering	Paper I: Theory of Machines Mechanics of Solids Engineering Materials Manufacturing Science Manufacturing Management Elements of Computation Paper II: Thermodynamics I.C. Engines, Fuels and Combustion Heat Transfer, Refrigeration and Air Conditioning Turbomachine and Powerplants
Physics	Paper I: Classical Mechanics Special Relativity, Waves & Geometrical Optics Physical Optics Electricity and Magnetism Electromagnetic Theory & Black Body Radiation Thermal and Statistical Physics Paper II: Quantum Mechanics I Quantum Mechanics II & Atomic Physics Molecular Physics Nuclear Physics Particle Physics & Solid State Physics Electronics
Zoology	Paper I: Non-Chordata and Chordata Ecology Ethology Economic Zoology Biostatistics Instrumental Methods Paper II: Cell Biology Genetics Evolution Systematics Biochemistry Physiology Developmental Biology
Statistics	Paper I: Probability Statistical Inference Linear Inference and Multivariate Analysis Sampling Theory and Design of Experiments Paper II: Industrial Statistics Optimization Techniques Quantitative Economics and Official Statistics Demography and Psychometry
Geology	Paper I: General Geology Geomorphology and Remote Sensing Structural Geology Paleontology Stratigraphy and Geology of India Hydrogeology and Engineering Geology Paper II: Mineralogy Igneous and Metamorphic Petrology Sedimentology Economic Geology Mining Geology Geochemistry and Environmental Geology

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UPSC IFS Syllabus 2025 for Interview

Candidates who qualify for the IFS Mains Examination will be invited by the commission to appear for the Personality Test (Interview). This stage, known as the UPSC IFS Interview, carries a weightage of 300 marks. The Interview aims to evaluate the candidate’s:

Communication skills
Decision-making ability
Leadership qualities
Awareness of environmental and forestry-related issues

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IFS Syllabus 2025 FAQs

Candidates must have a bachelor’s degree in one of the specified subjects (Forestry, Agriculture, Botany, Zoology, etc.) from a recognized university.

No, the IFS Prelims is the same as UPSC Civil Services Prelims. Candidates who clear it can appear for either the IFS Mains or IAS Mains, depending on their choice and cut-off marks.

Candidates need to choose two optional subjects, with each subject having two papers.

The IFS Mains exam consists of 1400 marks, including compulsory and optional papers.

The official IFS Syllabus PDF can be downloaded from the UPSC website or from here.

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IFS Syllabus 2025, Download PDF for IFS Prelims and Mains

IFS Syllabus 2025 Overview

IFS Prelims Syllabus 2025

IFS Mains Syllabus 2025

UPSC IFS Syllabus 2025 – Compulsory Subjects

UPSC IFS Syllabus 2025 – Optional Subjects

UPSC IFS Syllabus 2025 for Interview

IFS Syllabus 2025 FAQs

What is the eligibility for the IFS Exam 2025?

Is the IFS Prelims different from the UPSC CSE Prelims?

How many optional subjects are required in IFS Mains?

What is the total number of marks in the IFS Mains exam?

Where can I download the IFS Syllabus PDF?

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