81. Dry Ice sublimes at which temperature?
82. The Fertilizer Control Order came in
83. Indian soils are deficient in
84. Copper deficiency causes
85. Stem melanosis disease occurs in wheat due deficiency of
86. Most common zinc fertiliser is
87. Major source of water used by the plants is
88. Boron is injurious to plant when irrigational water contains . . . . . . . . concentration of boron.
89. Which type of chemical bond is seen in HCl?
90. Match the following columns
Column I (Bacteria)
Column II (Function)
a. Nitrobacteria
1. Fixation of atmospheric nitrogen
b. Ammonifying bacteria
2. Formation of NH4+ nitrogen
c. Denitrifying bacteria
3. Formation of NO3- nitrogen
d. Rhizobium sp.
4. Formation of NO2 nitrogen
| Column I (Bacteria) | Column II (Function) |
| a. Nitrobacteria | 1. Fixation of atmospheric nitrogen |
| b. Ammonifying bacteria | 2. Formation of NH4+ nitrogen |
| c. Denitrifying bacteria | 3. Formation of NO3- nitrogen |
| d. Rhizobium sp. | 4. Formation of NO2 nitrogen |
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