Question

Two processes by which nitrogen in the atmosphere is made available in the soil 0for plant use

Answer 1

Answer:

• nitrogen fixing bacterias by nitrification and ammonification
• decomposers by decomposing dead plants and animals

Answer 2

Two processes by which nitrogen in the atmosphere is made available in the soil for plant use:

There are some processes by which the atmospheric nitrogen is available in the soil for the use of the plant.

• Nitrogen fixing bacteria can convert the atmospheric nitrogen $N_{2}$ into the ammonium ion or $NH_{4}$ -  which will be present in the soil for the use of the plants. Legumes which is very much acceptable by the farmers to grow the nitrogen fixing bacteria in the nodules in their roots.
• Lightening can convert the atmospheric nitrogen to the ammonia and nitrate salt that can present in the soil.