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For students in search of
- Hydroponic Gardening
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Guides - Basics to Experts level
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Growing fruit and vegetables hydroponically
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Practical daily questions or queries of hydroponics lovers
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Current Hydroponics and Indoor Gardening Market Growth as well as Trends
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| 191. |
In chemical weathering the composition of minerals: |
| A. |
Changed |
B. |
Unaffected |
| C. |
Remain the same as in original rocks |
D. |
None of above |
Answer: Option A
Explanation:
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| 192. |
In degraded add soils root extension into anaerobic and highly reduced layer is reduced due to injurious concentration of: |
| A. |
Calcium |
B. |
Iron |
| C. |
Aluminum |
D. |
Magnesium |
Answer: Option B
Explanation:
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| 193. |
In general, waters with conductivity values below ______ mmhos/cm are satisfactory for irrigation in so far as salt content in concerned: |
Answer: Option D
Explanation:
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| 194. |
In high P-fixing soils, water soluble P2O5-fertilizers are applied to the crops essentially as: |
| A. |
Broadcast |
B. |
Placement below the seed |
| C. |
Placement above the seed |
D. |
Top dressing |
Answer: Option B
Explanation:
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| 195. |
Which one of the following statements is correct? |
| A. |
Rhizobia fix N2 in soil non-symbiotically |
B. |
Azotobacters fix N2 symbiotically |
| C. |
BGA fix N2 in paddy fields under submerged condition |
D. |
Closterdia fix N2 symbiotically |
Answer: Option B
Explanation:
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| 196. |
In no-tillage systems, the surface soil layers have: |
| A. |
Higher bulk density |
B. |
Lower bulk density |
| C. |
Higher Total pore space |
D. |
Lower water infiltration |
Answer: Option A
Explanation:
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| 197. |
In order to asses the immediately fertility level of a given soil for K, which one of the following forms of K present in soil would one test for? |
| A. |
Total K |
B. |
Exchangeable K |
| C. |
Water soluble K |
D. |
K held in the silt |
Answer: Option D
Explanation:
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| 198. |
In respect of a sugarcane crop to be grown in an acidic soil having high P-fixing capacity by the fertilizer of choice would be: |
| A. |
Triple super phosphate |
B. |
Finely ground rock phosphate |
| C. |
Coarse rock phosphate |
D. |
Super phosphate |
Answer: Option B
Explanation:
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| 199. |
In soil where the negative charge is pH dependent, liming Increase CEC which results in an increase potassium by the soil colloids and ______ in soil: |
| A. |
Increases |
B. |
Decreases |
| C. |
Little effect |
D. |
None of these |
Answer: Option B
Explanation:
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| 200. |
In the C:N ration of crop residues is more than 30, then: |
| A. |
Immobilization will take place |
B. |
Mineralization will take place |
| C. |
Partial mineralization will take place |
D. |
All of these |
Answer: Option A
Explanation:
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