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Q.1
RPSC Agriculture Research Officer (Agriculture Chemistry) - 2020 (Q.41)
MCQ (Single Correct) +1 −0.33
English हिन्दी
The pH value of calcareous soil may be high as 8.3 due to

which of the following?

निम्न में से किस कारण कैलकैरियस मृदा की पी.एच. 8.3 तक हो सकती है?
Q.2
RPSC Agriculture Research Officer (Agriculture Chemistry) - 2020 (Q.74)
MCQ (Single Correct) +1 −0.33
English हिन्दी
If any soil solution contains 10^-8 gm/litre OH^-, then calculate the pH value of these soil solution.
यदि किसी मृदा विलयन में OH^- की मात्रा 10^-8 ग्राम प्रति लीटर है तो उस मृदा विलयन की पी.एच. मान होगी -
Q.3
RPSC Agriculture Research Officer (Agriculture Chemistry) - 2020 (Q.77)
MCQ (Single Correct) +1 −0.33
English हिन्दी
By increasing salt concentration in alkaline soil, the pH value is
क्षारीय मृदाओं में लवण सान्द्रता बढ़ाने से उनका पी.एच. मान होता है -

Agriculture Chemistry Subjects

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History, Culture & Heritage of Rajasthan

9 Topics
Visual Art: Architecture, Sculpture & Paintings Social Life: Fairs, Festivals, Customs, Attire & Ornaments Age of Rajputs Performing Arts: Music, Dance & Drama Religious Cults, Saints & Folk Deities Language, Dialects & Literature of Rajasthan Pre & Early History of Rajasthan Emergence of Modern Rajasthan & Freedom Struggle Integration of Rajasthan

Geography, Natural Resources & Socio-Economic Development of Rajasthan

7 Topics
Drainage System & Irrigation Projects Soils, Forests & Wildlife Conservation Physiographic Divisions & Relief Features Demographics, Castes & Tribes Climate & Agro-Climatic Regions Environmental & Ecological Concerns Mineral & Power Resources

Soil Physical Chemistry, Colloids & Organic Matter

6 Topics
Diffuse Double Layer & Electrokinetic Properties of Colloids Soil Organic Matter Fractionation & Clay-Organic Interactions Soil Colloids & Origin of Charge Elemental Composition of Earth's Crust and Soils Adsorption and Desorption Properties of Soil Colloids Soil Physical Chemistry & Chemical Thermodynamics

Ion Exchange, Soil Reaction, Nutrient Fixation & Submerged Soils

6 Topics
Cation and Anion Exchange in Soils Nutrient Fixation in Soils (K, P, NH4+) Chemistry of Acid Soils Soil Reaction (pH) & Nutrient Availability Active Chemistry and Electrochemistry of Submerged Soils Soil-Pesticide Interaction

Soil Mineralogy & Clay Minerals

2 Topics
Crystalline & Non-Crystalline Clay Minerals Structural Chemistry & Classification of Soil Minerals

Pedology, Weathering & Soil Classification

3 Topics
Soil Formation Factors, Processes & Soil Profile Soil Classification Systems & Soil Taxonomy Weathering of Rocks and Minerals

Soil Survey, Land Evaluation & Remote Sensing/GIS

4 Topics
Soil Survey & Soil Mapping Major Soil Groups of India and Rajasthan Land Capability, Irrigability & Land Evaluation Remote Sensing and GIS Techniques

Soil Physics & Soil Moisture Management

3 Topics
Soil Moisture Classification, Movement & Management Soil Physical Properties Soil Air and Soil Temperature

Soil Fertility, Plant Nutrients & Fertilizer Technology

4 Topics
Micronutrients & Role of Chelates Fertilizer Manufacturing Processes & Characteristics Soil Fertility, Productivity & Essential Plant Nutrients Macronutrients (N, P, K, S) Forms & Transformations

Analytical Instruments, Soil Testing, INM & Soil Health

4 Topics
Soil Test Methods & Soil Test Crop Response (STCR) Analytical Instruments in Soil Testing Soil Fertility Evaluation, Field Trials & Soil Health Fertilizer Use Efficiency, SSNM & INM

Soil Microbiology, Biochemistry & Organic Manures

4 Topics
Biological Nitrogen Fixation, Bio-fertilizers & Organic Manures Microbial Transformation of Plant Nutrients Soil Organic Matter, Humus & Waste Recycling Soil Biota, Rhizosphere Biochemistry & Soil Enzymes

Problematic Soils, Poor Quality Water & Watershed Management

3 Topics
Salt-Affected Soils & Poor-Quality Waters Soil Erosion, Conservation & Watershed Management Acid, Acid-Sulphate & Permeability-Problem Soils

Agricultural Pollution & Remediation

1 Topic
Soil, Water and Air Pollution in Agriculture

Volumetric & Analytical Chemistry

2 Topics
Analytical Reagents, Indicators & Standard Curves Acid-Base, Redox & Complexometric Titrations

Advanced Soil & Plant Chemical Analysis

3 Topics
Nutrient Potentials, Buffering & Fixation Capacities Electrochemical Titration & Exchange Capacity Estimation Soil and Plant Sample Analysis for Essential Nutrients

Radioisotopes & Nuclear Techniques in Soil Science

2 Topics
Radioactivity, Radioisotopes & Nuclear Radiations Radiation Monitoring & Nuclear Instruments
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