Boron concentration is irrigation water is considered safe only upto_________________?
A. 0.7 ppm
B. 1.5 ppm
C. 2 ppm
D. 3 ppm
A. 0.7 ppm
B. 1.5 ppm
C. 2 ppm
D. 3 ppm
A. NH3OAC
B. NH4OAC
C. NH4AOC
D. Both b & c
A. [(NaPO6)13]
B. [(NaPO3)13]
C. [(NaPO2)6]
D. None of the above
A. Quartz
B. Smectite
C. Gypsum
D. All the above
A. 14%
B. 46%P
C. 40%P
D. 50%P
A. Acid
B. Alkali
C. Both a & b
D. Distilled water
A. Reduction
B. Oxidation
C. Both a & b
D. Dehydration
A. 21
B. 23
C. 33
D. 39
A. 99 & 1
B. 90 & 10
C. 80 & 20
D. None of the above
A. Oligotrophic
B. Mestrophic
C. Eutrophic
D. Hydrotrophic