Soil Science One Liner Questions & Answer
Soil Science One Liner Questions
Subject:- Soil Science
Special 30 One Liner Questions
| Question | Answer | |
| 1 | Bulk density of coarse textured soils? | 1.4 – 1.8 g/cm3 |
| 2 | Bulk density of fine textured soils? | 1.1 to 1.3 g cm3 |
| 3 | Bulk density of normal soil is? | 1-1.6 g/cc |
| 4 | Bulk density of organic peat soils? | 0.5 g/cm3 |
| 5 | C.E.C. of vermiculate? | 80-150 c mol (P +)/kg soil |
| 6 | C: N ratio in FYM is? | 25:1 to 30:1 |
| 7 | C: N ratio of Legumes is? | 20:1 to 30:1 |
| 8 | C:N ratio for normal soils are? | 10:1 ratio |
| 9 | C:N ratio for sawdust is? | 400:1(highest) |
| 10 | C:N ratio for young leaves / legumes? | 10:1 to 30:1 |
| 11 | C:N ratio of micro organism is? | 4:1 to 9:1 (lowest) |
| 12 | C:N ratio of the Indian soil? | 12:01 |
| 13 | Cation exchange capacity of humus? | 200 meq/100 g soil |
| 14 | CEC of humus? | 150-300 C mol (p+)/kg soil |
| 15 | Critical deficiency level (mg/kg) of available Zinc (DTPA-Zn) in alluvial soils of Indo-Gangetic plains is? | 0.60 mg/kg |
| Question | Answer | |
| 16 | Critical limit of 0.005M DTPA extractable Mn in soil? | 2-4 ppm |
| 17 | Critical limit of Ammonium oxalate extractable molybdenum in soil? | 0.05 to 0.2 ppm |
| 18 | Bulk Density of earth? | 2.6-3 g/cc. |
| 19 | Bunch terracing is done when the slope is more than? | 15% |
| 20 | Chlorite is? | 2:1:1 or 2:2 type clay mineral |
| 21 | At PWP the soil moisture tention at? | 31 bar |
| 22 | Atrazine persistence in soil approx? | 1 year |
| 23 | Availability of Micronutrients (Iron, copper, manganese and zinc) is more in? | Acidic pH |
| 24 | Availability of molybdenum is more in? | Alkaline pH |
| 25 | Availability of phosphorus is optimum in the soil pH range? | 6.1 to 7.0 |
| 26 | EC of saline soil? | > 4 dS/m |
| 27 | For field crops K/Mg ratio should be? | < 5:1 |
| 28 | For normal crop growth, aeration porosity of soil must be not less than? | 20% |
| 29 | Generally the particles density of normal soil is? | 2.65 gram/cm3 |
| 30 | Ideally, Ca/Mg ratio should not be greater than? | 7:01 |
Soil Science One Liner Questions
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