Q. No.Which of the following macronutrients does not form components of fertiliser?
(1) N,P
(2) P,S
(3) K,S
(4) S,Zn
(1) N,P
(2) P,S
(3) K,S
(4) S,Zn
Nitrogen:
Find the incorrect one.
1. Plants compete with microbes for it.
2. It is a limiting nutrient for both natural and agricultural ecosystem
3. Nitrogen has triple covalent bonds
4. Nitrogen fixation is conversion of nitrogen into nitrate
In nature, ……….. and ……….. provide enough energy to convert Nitrogen to nitrogen oxides (NO, NO2, N2O).
(1) Lightning, Forest fires
(2) Industrial combustions, UV radiation
(3) Forest fire, Lightning
(4) Lightning, UV radiation
Decomposition of organic nitrogen of dead plants and animals into ammonia is called
(1) Nitrogen Fixation
(2) Ammonification
(3) Nitrification
(4) Denitrification
Which of the type of fixation leads to fixation of atmospheric nitrogen to ammonia?
(1) Biological nitrogen fixation
(2) Industrial nitrogen fixation
(3) Electrical nitrogen fixation
(4) Both A and B
Ammonia is first oxidized to nitrite by the bacteria except
(1) Nitrosomonas
(2) Nitrococcus
(3) Nitrobacter
(4) All of these
Nitrite is oxidized to Nitrate by the bacterium
(1) Nitrococcus
(2) Nitrosomonas
(3) Nitrobacter
(4) Thiobacillus
The nitrifying bacteria are
(1) Photoautotroph
(2) Chemoautotroph
(3) Nitrotroph
(4) Organotroph
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