Soil Science
Boron concentration is irrigation water is considered safe only upto _______?
0.7 ppm
2 ppm
1.5 ppm
3 ppm
0.7 ppm
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Material deposited by the wind is called _______?A. Colluvial
B. Regolith
C. Alluvium
D. Eolian
The reaction of Na2 CO3 salt is _______?
A. Alkaline
B. Acidic
C. Neutral
D. None of these
Which compound decay slowly _______?
A. fats
B. Lignin
C. Amino acid
D. Cellulose
Which bacteria convert nitrite to nitrate _______?
A. Pseudomonas
B. Nitrobacter
C. Frankia
D. None of these
The nutrient particularly influencing root growth is _______?
A. Nitrogen
B. Zinc
C. Organic
D. Phosphorus
Na2CO3 salts is _______?
A. Acidic
B. Alkaline
C. Neutral
D. None of these
Main product of photosynthesis is _______?
A. C6H12O6
B. C3H6O6
C. C12H24O12
D. C5H12O6
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