Soil-Pollution_chapter_ISSSbook.pdf
217.9 KB
Soil-Pollution_chapter_ISSSbook.pdf
ISSS_SoilFertility-EvaluationandManagement_BookChapter.pdf
2.7 MB
ISSS_SoilFertility-EvaluationandManagement_BookChapter.pdf
Maximum N content found in N fertilizer
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16%
Urea
81%
Anhydrous ammonia
1%
Sodium nitrate
2%
Ammonium sulphate
The conversion factor for calculating P from P2O5
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28%
P2O5 x 2.29
21%
P x 2.29
48%
P2O5 x 0.43
3%
P x 2.25
The phenomenon slickenside found in which soil
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75%
Vertisol
13%
Mollisol
7%
Oxisol
5%
Alfisol
Which organic fraction not soluble in both acid and alkali
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13%
Fulvic
14%
Humic
67%
Humin
6%
All of the above
In munsell colour chart hue 10 represents as ______
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32%
Red
26%
Black
11%
Grey
31%
Yellow
Available water held between
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3%
Saturation to wilting point
20%
Field capacity to hygroscopic coefficient
4%
Only field capacity
74%
Field capacity to wilting point
Soil colloidal particle shows the phenomena
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10%
Flocculation
15%
Adhesion and cohesion
3%
Plasticity
72%
All of the above
Which plant is used for indication of permanent wilting point? (M. Imp)
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13%
Safflower
78%
Sunflower
6%
Marigold
3%
Wheat
Immobilization of sulphur occur in soil when C:S ratio is
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35%
> 300:1
41%
> 400:1
10%
< 300:1
15%
> 200:1
Denitrification is a process of
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14%
Oxidation
5%
Hydration
2%
Carbonation
78%
Reduction
👍2
Most of the soil organisms are
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5%
Psychrophiles
66%
Mesophiles
14%
Thermophiles
14%
All of the above
Actinomycetes prefer which condition for their growth
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53%
Slightly alkaline
29%
Alkaline
11%
Acidic
7%
Neutral