1. lightning makes nitrates from nitrogen and oxygen in the air. the nitrates then get washed into the soil by rain.
2. animal and plants decompose- depositing organic nitrogen into the soil
idsloving it in soil
nitrogen cycle
Nitrates and Oxygen
nitrates are soluable therefor become a solution when mixed with water!
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Soil nitrates are replaced in various ways. One of the most common ways to replace soil nitrate is by suing synthetic fertilizers.
idsloving it in soil
They absorb them from the soil where they grow.
nitrogen cycle
Acid rain contains nitrates, as does some runoff water from fertilized soil.
Nitrates and Oxygen
by using fertilizer
Rhizobium
lightning and/or soil in the ground
nitrates are soluable therefor become a solution when mixed with water!
Any legume will convert nitrogen to nitrates, as well as many bacteria found in the soil
- absorbing nitrates from soil by the roots- for some plants fixing nitrogen with the help of bacteria