Q.86
If the volume fractions of water content, mineral and organic constituents in a soil are 0.25, 0.50 and 0.25, what will be the
volumetric heat capacity of soil in cal/em? ?
Q.87
Read the following statements and
choose the correct answer from the options given below
(A). Photographic camera is an active sensor when used in sunlight.
(B). Photographic camera is a passive sensor when used in sunlight
(C). Radar and laser altimeter are active sensors
(D). Passive sensors are preferable when natural emittance or reflectance levels are low.
Q.88
Which epipedon is dark coloured with base saturation 9 months per year?
Q.89
If cumulative horizontal infiltration of a soil is 90 mm at 100 min and saturated hydraulic conductivity of the soil is 0.1
mm/min, the cumulative vertical infiltration at 100 min will be
Q.90
The actual pixel value is retained in which method of resampling?
General Agriculture
6 TopicsPedology
4 Topics
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 Topics
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 Topics
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 Topics
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 Topics
Soil Water Retention (pF Curve, Suction Scales, Tensiometry) & Saturated Water Flow (Darcy's Law, Hydraulic Conductivity)
Active
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)
Official PYQ Papers
Previous Year Papers of Soil Science
Practice official shift-wise question papers with answer keys and detailed explanations on the actual exam pattern.
1
Total Available
Previous Papers
2024
29-06-2024