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Yes, soil does contain nitrogen.
Legumes fix nitrogen in the soil.
Typically, atmospheric nitrogen gets into the soil by nitrogen-fixing bacteria that are symbiotic with such plants as clover, soybeans and alfalfa. Bacteria in the plant extract nitrogen from the air, and when the plants die, the nitrogen remains in the soil as the plant decays.
Nitrogen compounds known as Nitrates found in the soil
Its fertilizer with extra nitrogen added to it. The nitrogen helps the soil.
Legumes "fix" nitrogen in nodules on their roots, so they do not need additional nitrogen-containing fertilizers.
Because leguminous plants are capable of fixing free nitrogen from the air with help of their root nodules. Thus soil get rich in nitrates in those places where these plants are grown.
soil
The fact that nitrogen will be added to the nitrogen deficient soil is the advantage of adding fertilizer. Nitrogen, phosphorus, and potassium are the major nutrients that plants and soils need. Commercial, conventional, standard, synthetic fertilizers also are called NPK fertilizers. The initials come from the first letters of the scientific names for precisely these three nutrients. Additionally, nitrogen is present in such organic fertilizers as compost. So whether by the inorganic or the organic route, the soil gets nitrogen when it gets a fertilizer treatment.
No, but they do need the nutrients commonly found in the soil, and nitrogen fixing soil bacteria are extremely beneficial, though not technically necesary, to plants.
i dkj
Legumes are plants that can use nitrogen from the air for growth. This nitrogen can be added to the soil to increase soil fertility. Legumes include peas and beans.
plants need nitrogen to grow thats why in ponds there is alot of plants cuz the nitrogen runs off from the fields!!
Yes, soil does contain nitrogen.
Lightning increases nitrogen in the soil
It doesn't. Harvesting removes soil nitrogen