Following materials can be used as ammenments in calcareous... | Agrigyan

Q.1

Soil Science- ICAR JRF/SRF 2024 (Q.99)

MCQ (Single Correct) +4 −1

Following materials can be used as ammenments in calcareous soils to reduce the calcareousness

(A) . Alluminium sulphate

(B) . Ammonium polysulfide

(C) . Elemental sulphur

(D) . Sulphuric acid

Choose the correct answer from the options given below:

(A), (6) and (D) only. (A), (B) and (C) only, (A), (B), (C) and (D). (B), (C) and (D) only.

Q.2

Soil Science- ICAR JRF/SRF 2024 (Q.107)

MCQ (Single Correct) +4 −1

Read the following statements

(A) . Saline soils were formerly called white alkali because of the deposits of salts on the surface following evaporation

(B) . Saline soils have an electrical conductivity of the saturated extract EC > 4 dS mt

(C) . Saline soils have pH > 8.5

(D) . They have exchangeable sodium percentage (ESP) <15%.

Choose the correct answer from the options given below:

(A), (6) and (D) only. (A), (B) and (C) only, (A), (B), (C) and (D). (B), (C) and (D) only.

Q.3

Soil Science- ICAR JRF/SRF 2024 (Q.108)

MCQ (Single Correct) +4 −1

Sensitive crops like vegetables, fruits (citrus) and horticultural crops can tolerate biuret content in urea up to

015% 0.25% 15% 25%

Q.4

Soil Science- ICAR JRF/SRF 2024 (Q.110)

MCQ (Single Correct) +4 −1

The primary processes involved in salt accumulation in soils are

(A) . Weathering of rocks and parent materials.

(B) . Low water table with less evaporative demand

(C) . Excessive application of salts in fertilizer, animal manure, or compost.

(D) . Poor quality (high salt) irrigation water; irrigation mismanagement, with poor internal soil drainage

Choose the correct answer from the options given below:

(A), (B) and (D) only. (A), (B) and C) only. (A), (B), (C) and (D). (A), (C) and (D) only.

खंड अ: सामान्य कृषि

6 टॉपिक्स

शस्य विज्ञान, जुताई एवं फसल उत्पादन कृषि कीट विज्ञान, सूत्रकृमि विज्ञान एवं फसल सुरक्षा मृदा विज्ञान, पादप पोषण एवं सुधार कोशिका विज्ञान, पादप कार्यिकी एवं जैव रसायन कृषि मौसम विज्ञान एवं जलवायु विज्ञान फसल आनुवंशिकी, पादप प्रजनन एवं आईपीआर

Pedology

4 टॉपिक्स

Dokuchaev Pedological Concepts, Soil Profile Horizons & Comprehensive Soil Taxonomy (12 Soil Orders, Epipedons, Subsurface Horizons) Earth's Crust Geochemistry, Rock Weathering, Weathering Indices & Pedogenic Processes (Addition, Loss, Translocation, Transformation) Soil Survey Methodologies, Remote Sensing, GIS Mapping & Major Soil Groups of India (Alluvial, Black, Red, Laterite, Desert) Moisture and Temperature Soil Regimes, Land Capability & Fertility Capability Classification (FCC)

Soil Chemistry

3 टॉपिक्स

Surface Chemistry: Diffuse Double Layer (DDL), Zeta Potential, Cation/Anion Exchange Capacity & Lyotropic Adsorption Series Soil Organic Matter: Humus Fractionation (Humic, Fulvic, Humin), Carbon-Nitrogen Dynamics & van Bemmelen Factor (1.724) Clay Mineralogy: Layer Silicates (Kaolinite, Smectite, Illite), Amorphous Minerals & X-Ray Diffraction (XRD) Identification

Soil Fertility

4 टॉपिक्स

Micronutrient Chemistry (Fe, Mn, Zn, Cu, B, Mo): Ionic Strength, Availability Indices & Chelation Equilibria Salt-Affected & Problematic Soils Chemistry: Saline vs Sodic Soils, ESP, SAR, Gypsum Requirement & Liming of Acid Soils Essential Macronutrient Dynamics (N, P, K, S, Ca, Mg): Transformations, Fixation Mechanisms & Soil Solution Equilibrium Soil Testing Principles, Fertilizer Recommendations (STCR), Plant Analysis, Hidden Hunger & Critical Nutrient Limits

Soil Microbiology

3 टॉपिक्स

Soil Enzymes (Dehydrogenase, Urease, Phosphatase), Pesticide Biodegradation & Biofertilizer Inoculant Technology Soil Microbiota Diversity, Rhizosphere Biology & Microbial Ecology (Bacteria, Fungi, Actinomycetes, Protozoa) Biogeochemical Nutrient Transformations: Nitrogen Fixation (Rhizobium, Azotobacter), Nitrification, Ammonification & P/S/Fe Mobilization

Soil Physics

4 टॉपिक्स

Soil Water Retention (pF Curve, Suction Scales, Tensiometry) & Saturated Water Flow (Darcy's Law, Hydraulic Conductivity) Soil Structure, Aggregate Stability, Bulk/Particle Density, Porosity & Crusting Mechanics in Sodic Soils Soil Texture (Stokes' Law Principles & Limitations), Mechanical Particle Size Analysis & Soil Packing Geometry Unsaturated Water Flow, Infiltration Kinetics (Philip's Model), Soil Aeration (ODR), Thermal Regimes & Physical Erosion (USLE)

Statistics

2 टॉपिक्स

Soil Statistical Analysis: Significance Testing (t-Test, F-Test), Correlation, Regression & Geostatistical Spatial Modeling Soil Experimental Designs: CRD, RBD, Latin Square, Factorial Trials & Split-Plot Designs in Pot and Field Studies सक्रिय

Soil Science- ICAR JRF/SRF 2024

120 Questions Bilingual

RPSC Agriculture Exams

5 Exams

Food Safety Officer Assistant Agriculture Officer Agriculture Officer RPSC Agriculture Research Officer RPSC AARO

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National & PG Entrances

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ICAR AIEEA PG CUET UG Rajasthan Agriculture Pre-PG ICAR JRF/SRF