AARO Agriculture Chemistry

RPSC AARO Agriculture Chemistry

RPSC AARO: Course Highlights

·  Exam-Focused Notes
Simplify your preparation with concise, targeted notes for effective and efficient revision.

·  Test Series with PYQs
Practice extensively with topic-specific tests and previous year questions to boost your confidence.

·  Live and Recorded Sessions
Engage in interactive live classes and access detailed recorded lectures to cover the syllabus comprehensively.

·  Regular Mocks and Current Affairs
Assess your progress through weekly mock tests and stay informed with relevant current affairs.

·  Personalized Mentorship
Receive tailored guidance and strategies to excel in the exam from experienced mentors.

·  Revision and Doubt Sessions
Reinforce your understanding and clear doubts with focused revision classes.

·  Comprehensive Mock Exams
Experience the actual exam environment with full-length mock tests designed to enhance readiness.

·  Join now and ensure your success with our structured approach!

Exam Pattern

*Negative Marking: For every wrong answer 1/3 of the marks for a particular question will be deducted

Syllabus of RPSC AARO Agronomy

PART-A General Knowledge of Rajasthan – 30 Questions

Unit-I

Historical Rajasthan: Pre and Proto-historical sites of Rajasthan. Important

historical centers of early Christian Era. Prominent rulers of major Rajput dynasties of

Rajasthan and their achievements & contributions – Guhilas- Sisodiyas, Chauhans,

Rathores and Kachchawas.

Emergence of Modern Rajasthan: Agents of Social Awakening in Rajasthan

during 19th and 20th Centuries. Political Awakening: role of newspapers and political

institutions. Praja Mandal movement in various princely states in 20th century.

Integration of Rajasthan.

Art of Rajasthan: Architectural tradition of Rajasthan- temples, forts and palaces

from ancient to modern period; Various schools of paintings developed during

medieval period; Classical Music and Classical Dance, Folk Music & Instruments;

Folk Dances & Drama.

Language & Literature: Dialects of Rajasthani language, Literature of

Rajasthani language and Folk literature.

Religious life: Religious communities, Saints and Sects in Rajasthan. Folk

Deities of Rajasthan.

Social Life in Rajasthan: Fairs and festivals; Social customs and traditions;

attires and ornaments.

Geography of Rajasthan:- Broad physical features- Mountains, Plateaus, Plains

& Desert; Major Climatic types; Major rivers and lakes; Major forest types and

distribution; Population growth, Density and Distribution; Desertification, Droughts &

Floods; Environmental pollution and Ecological concerns.

PART-B (AGRICULTURE CHEMISTRY)

Unit-I Chemical (elemental) composition of the earth's crust and soils. Elements of

equilibrium, thermodynamics, chemical equilibria, electrochemistry, chemical

kinetics and Electrode potential. Soil Colloids : Inorganic and organic colloids -

origin of charge concept of point of zero charge (PZC), diffuse double layer theories

of soil colloids, zeta potential, stability, coagulation/flocculation and peptization of

soil colloids : electrometric properties of soil colloids; adsorption and desorption

properties of soil colloids; soil organic matter - fractionation of soil organic matter

and different fractions, clay organic interactions.

Unit-II Cation and anion exchange process in soil. AEC, CEC; buffering capacity,

experimental methods to study ion exchange phenomena and practical implications

in plant nutrition. Soil reaction and its influences on nutrient availability. Potassium,

phosphate and ammonium fixation in soils. Chemistry of acid soils; active and

potential acidity; lime potential; sub-soil acidity. Chemistry and electrochemistry of

submerged soils (Redox potential, oxidation-reduction potential), soil pesticide

interaction.

Unit-III Structural chemistry, classification of minerals, chemical composition and

properties of clay minerals; genesis and transformation of crystalline and non-

crystalline clay minerals; amorphous soil constituents and other non-crystalline

silicate minerals; clay minerals in Indian soils.

Unit-IV Factors of soil formation, soil forming processes; weathering of rocks and

mineral transformation; soil profile; weathering sequences of minerals with special

reference to Indian soils. Concept of soil individual; soil classification system-

historical developments and modern system of soil classification with special

emphasis on soil taxonomy; soil classification and soil maps.

Unit-V Soil survey and its types; soil survey techniques, soil survey interpretations,

soil mapping, mapping units, techniques for generation of soil maps. Landform -

major soil groups of India with special reference to Rajasthan, land capability

classification and land irrigability classification, land evaluation. Remote sensing

and GIS techniques of soil and water and crop studies.

Unit-VI Soil physical properties : soil texture, structure, bulk density, particle

density, aggregates, soil consistency, soil colour, soil air and soil temperature.

Influence of soil temperature and air on plant growth; soil moisture: classification,

constants, energy relationship, movement in saturated and unsaturated condition and

management.

Unit-VII Soil fertility and soil productivity; nutrient sources - fertilizers and

manures, essential plant nutrients - functions and deficiency symptoms. Sources;

forms, immobilization and mineralization of N,P,K and S. Micronutrients; critical

limits in soil and plants; factor effecting their availability and correction of their

deficiencies in plants, role of chelates in nutrient availability. Manufacturing

processes for different fertilizers using various raw materials, characteristics and

nutrient contents.

Unit-VIII Principles of pH meter, EC meter, colorimeter and flame photometer.

Common soil test methods for fertilizer recommendations; quantity intensity

relationships; soil test crop response correlations and response functions. Fertiliser

use efficiency; fertilizer recommendations - usefulness and limitations; site-specific

nutrient management, plant need based nutrient management; integrated nutrient

management, soil fertility evaluation - knowledge of conduct of field

trails/experiments, soil health, indicators for determining soil health, soil quality

management and sustainability.

Unit-IX Soil biota, microbiology and biochemistry of root-soil interface,

phyllosphere, rhizosphere, soil microbial biomass (C, N and P), soil enzymes,

microbial transformation of nitrogen, phosphorus, sulphur, iron and manganese in

soil, biochemical and biodegradation of soil organic matter. Soil organic matter and

humus, fractions, structure, formation, C:N ratio, recycling of agricultural and

industrial wastes, biological nitrogen fixation and bio-fertilizers. Chemical

composition of FYM, Vermicompost, poultry manure and common organic

manures.

Unit-X Area, distribution and management of salt affected soils and poor quality

waters, acid soils, acid sulphate soils, highly and slowly permeable soils. Soil

erosion, extent, type and effects, soil conservation techniques, water harvesting

techniques and watershed management, remote sensing for soil and watershed

management.

Unit-XI Soil, water and air pollution problems associated with agriculture, nature

and extent. Remediation/amelioration of contaminated soil and water.

Unit-XII Preparation of solutions for standard curves, analytical reagents,

qualitative reagents, indicators and standard solutions for acid-base. Oxidation-

reduction and complexometric titration.

Unit-XIII Determination of nutrient potentials and potential buffering capacities of

soils for phosphorus and potassium, estimation of phosphorus, ammonium and

potassium fixation capacities of soils. Electrochemical titration of clays;

determination of cation and anion exchange capacities of soils, estimation of

exchangeable cations, estimations of root cation exchange capacity. Analysis of soil

and plant samples for essential nutrients.

Unit-XIV Radioactivity and units, radioisotopes- properties and decay principles,

nature and properties of nuclear radiations. Principles and use of radiation

monitoring instruments. GM- Counter, solid and liquid scintillation counters.

Neutron moisture meter, mass- spectrometry, auto- radiography. Dosages of

radiation exposure, radiation safety regulatory aspects.

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