Physical Science ICAR JRF 2020 Solved Question Paper pdf download
Q. 1. Under what condition, denitrification is a major mechanism of nitrogen loss from the soil?
1. Well-drained soil
2. Fallow soils
3. Submerged soil
4. Pastured land soil
3. Submerged soil
Q. 2. Match List I with List lI
        List I                     List II
A. Spectral resolution          I. 22 Days21/21
B. Spatial resolution           II.8 bits
C.Radiometric resolution       III 110 nm
D. Temporal resolution         IV 36 m
Choose the correct answer from the options given below
1. A-IV, B-I1, C – III, D – I
2. A-III, B – IV, C – II, D -I
3. A -II, B- IV, C – I, D – II
4. A – III, B- II, C – I, D – IV
2. A-III, B – IV, C – II, D -I
Q. 3. Keen’s box is used to determine which of the following properties?
1. Water holding capacity
2. Soil temperature
3. Soil permeability
4. Soil moisture tension
1. Water holding capacity
Q. 4. If the mean annual soil temperature is 8-15°C and the difference between mean annual summer and mean annual winter temperature is < 5°C, then the soil temperature regime is known as?
1. Mesic
2. Isomesic
3. Thermic
4. Isothermic
2. Isomesic
Q. 5. Water erosion permitting crop is?
1. Red gram
2. Black gram
3. Soyabean
4. Cow pea
1. Red gram
Q. 6. Emissivity of black body is?
1. 0.50
2. 0.25
3. 1.00
4 . 0.75
3. 1.00
Q. 7. The enzymes which catalyse the interconversion of aldose and ketose sugars are?
1. Isomerases
2. Epimerases
3. Carboxylases
4. Transferases
1. Isomerases
Q. 8.Instrumental methods of analysis of pesticide residue include chromatographic techniques such?
A. TLC
B. GLC
C. HPLC
1. Both A and B
2. All A B and C
3.Conly
4. Both B and C
2. All A B and C
Q. 9. Most limiting factor for crop cultivation in desert areas is?
1. Water only
2. Temperature only
3. Water and Temperature
4. Solar-radiation
1. Water only
Q. 10. Biofertilizers are?
1. Organic manure
2. Gree manure
3. FYM
4. Culture of micro-organisms
4. Culture of micro-organisms
Physical Science ICAR JRF 2020 Solved Question Paper pdf download
Q. 11. Soil moisture characteristics curve represents the relationship between?
1. Soil texture and soil moisture content
2. Soil structure and soil moisture content
3. Available soil moisture and soil moisture content
4. Soil moisture tension and soil moisture content
4. Soil moisture tension and soil moisture content
Q. 12. Bench terrace sloping outwards are effective only in?
1. High rainfall area
2. Low rainfall area
3. Medium rainfall area
4. Heavy rainfall area
2. Low rainfall area
Q. 13. Which of the following is a man-made epipedon?
1. Albic
2. Ochric
3. Anthropic
4. Mollic
3. Anthropic
Q. 14. Weight of one ha furrow slice of root zone depth soil is about?
1. 2.2 x 106kg
2. 1.5 x 106kg
3. 20 x 106kg
4.15 x 106kg
1.
Q. 15. Biotite is the example of which type of rock-forming mineral?
1. Orthosilicate
2. lososilicate
3. Tectosilicate
4. Phyllosilicate
4. Phyllosilicate
Q. 16. The WHO standard of drinking water is?
1. 20 mg NO ¯ 3-N/L
2. 10 mg NO ¯3 – N/L
3. 30 mg NO ¯ 3-N/L
4. 50 mg NO ¯ 3-N/L
2. 10 mg NO ¯3 – N/L
Q. 17. Which of the following is NOT associated with podzolization?
1. Removal of Fe & Al
2. Removal of Silica
3. Removal of humus
4. Acidic condition
2. Removal of Silica
Q. 18. Which instrument is used for the determination of K content in soil?
1. UV-VIS spectrophotometer
2. Atomic absorption spectrophotometer
3. Flame photometer
4. Colorimeter
3. Flame photometer
Q. 19. Match List I with List I
     List I                      List II
A.Splash erosion              I.Wind Erosion
B.Saltation                   II.Rainfall factor
C.Erosivity                   III.Impact force required to detach soil particles
D.Dispersion ratio             IV.Impact of falling raindrops
Choose the correct answer from the options given below
1. A-I, B-II, C – IV, D – I
2. A-IV, B-I,C -II, D- Ill
3. A-II, B- III, C – IV, D-I
4. A-III, B – IV, C – I, D -I
2. A-IV, B-I,C -II, D- Ill
Q. 20. The equation to estimate soil loss by wind erosion is E = IRKFCWDB, in which K stands for?
1. Soil textured class factor
2. Surface roughness factor
3. Surface cover factor
4. Wind barrier factor
2. Surface roughness factor