Question

State two sources from which plants obtain nitrogen

Answer 1

1) Nitrogen which is fixed by bacteria. Eg- Rhizobium. 2) During lightning, the high temperature converts nitrogen into oxides of nitrogen.These oxides dissolve in water to give nitric and nitrous acids and fall on land along with rain.It is then utilised by plants.

Answer 2

i) Plants obtain Nitrogen with the help of rhizobium bacteria who convert atmospheric nitrogen to be able to use by the plants.
ii) Plants get nitrogen from the Fertliser provided by farmers.
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