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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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| 431. |
The most abundant mineral present in the earth's crust is: |
| A. |
Quartz |
B. |
Felspar |
| C. |
Mica |
D. |
Hornblende |
Answer: Option B
Explanation:
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| 432. |
The most important silicte clays are known as: |
| A. |
Photosilicates |
B. |
Phyllosilicates |
| C. |
Autosilicates |
D. |
Simply silicates |
Answer: Option B
Explanation:
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| 433. |
Which of the following soil texture is lighter than others? |
| A. |
Silty clay loam |
B. |
Clay loam |
| C. |
Sandy loam |
D. |
Loamy sand |
Answer: Option D
Explanation:
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| 434. |
The N2 fixation by Azotobacter and Acospirillum in the cereals is called: |
| A. |
Symbiotic N2 fixation |
B. |
Non-symbiotic N2 fixation |
| C. |
Both of these |
D. |
None of these |
Answer: Option B
Explanation:
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| 435. |
The H2 fixation by Rhizohium species in legume is called : |
| A. |
Symbiotic N2 fixation |
B. |
Non-symbiotic N2 fixation |
| C. |
Both of these |
D. |
None of these |
Answer: Option A
Explanation:
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| 436. |
The N2 fixation in pea may be upto _______ kg N2/ha/year: |
| A. |
80 - 150 |
B. |
90 - 110 |
| C. |
15 - 75 |
D. |
50 - 100 |
Answer: Option A
Explanation:
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| 437. |
The N2 fixation in soyabean may be upto ______ kg N2/ha/year: |
| A. |
100 - 175 |
B. |
60 - 100 |
| C. |
65 - 115 |
D. |
40 - 90 |
Answer: Option C
Explanation:
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| 438. |
The N2 fixation in the roots of Alfalfa _______ kg N2/ha/year: |
| A. |
100 - 150 |
B. |
125 - 300 |
| C. |
50 - 76 |
D. |
None of these |
Answer: Option B
Explanation:
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| 439. |
The N2 fertilizer of choice for tea is: |
Answer: Option C
Explanation:
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| 440. |
The natural soil aggregates are called as: |
| A. |
Concretion |
B. |
Mottling |
| C. |
Peds |
D. |
Soil separates |
Answer: Option C
Explanation:
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