Question

state how the nitrates in the soil gets converted to nitrogen of the atmosphere

Answer 1

The nitrogen cycle is the biogeochemical cycle by which nitrogen is converted into various chemical forms as it circulates among the atmosphere, terrestrial, and marine ecosystems. The conversion of nitrogen can be carried out through both biological and physical processes. Important processes in the nitrogen cycle include fixation, ammonification, nitrification, and denitrification. The majority of Earth's atmosphere (78%) is nitrogen,[1] making it the largest source of nitrogen. However, atmospheric nitrogen has limited availability for biological use, leading to a scarcity of usable nitrogen in many types of ecosystems. The nitrogen cycle is of particular interest to ecologists because nitrogen availability can affect the rate of key ecosystem processes, including primary production and decomposition. Human activities such as fossil fuel combustion, use of artificial nitrogen fertilizers, and release of nitrogen in wastewater have dramatically altered the global nitrogen cycle.

Answer 2

Nitrogen is also key in the existence of
ecosystems and food chains. Nitrogen
forms about 78% of the air on earth.
But plants do not use nitrogen directly
from the air. This is because nitrogen
itself is unreactive, and cannot be used
by green plants to make protein.
Nitrogen gas therefore, needs to be
converted into nitrate compound in
the soil by nitrogen-fixing bacteria in
soil, root nodules or lightning.
hope my answer helps.