Dominant primary mineral in earth crust is (ARS 2014)
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76%
Feldspar
6%
Mica
2%
Hornblende
16%
Quartz
Which of the following element is responsible for Eutrophication (2018 JRF)
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29%
N
60%
P
6%
K
5%
S
Mg rich mineral is (2018 JRF)
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47%
Chlorite
13%
Kaolinite
27%
Montmorillonite
13%
Illite
Movement of nutrients to the roots along with water is called (ARS 2014)
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14%
Diffusion
67%
Mass Flow
12%
Passive transport
7%
Active transport
Diffusion can be measured by technique is called
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29%
Half - cell
15%
Tensiometer
23%
Irrometer
33%
Thermocouple psychrometer
Soil formed from following rocks are fertile (IARI Ph.D)
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18%
Acid rocks
55%
Basic rocks
11%
Neutral rocks
17%
We cant say based on rock
Nutrient mobility concept was given by (IARI Ph.D)
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11%
Troug
13%
Baule
68%
Bray R. H.
7%
Simonson
Wavelength for estimation of Available phosphorus (IARI Ph.D)
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9%
550 nm
39%
650 nm
51%
660 nm
2%
150 nm
The following element strongly bound to organic matter (IARI. Ph.D)
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26%
Zn
55%
Cu
8%
Ni
11%
Co
Soil-Pollution_chapter_ISSSbook.pdf
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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