How is nitrogen returned to the soil?

Answer 1

Nitrogen is returned to the soil because nitrogen actually began in the soil and grew out and some even say that if you eat nitrogen you can get a cold or some kind of sick fluid inside you but that is a very good question and i would love to answer some more of youre answers.

Answer 2

Nitrogen returns to the soil when living things like a tree, for example, dies. It then falls, decomposes, and returns the nitrogen back to the soil. After millions of years, it will eventually become fossils or even after that, oil.

After the nitrogen returns to the soil, it can be readmitted into the air or put into plants, animals, or trees.

The Nitrogen Cycle:

Like the carbon cycle and water cycle there is anitrogen cycle of nitrogen fixing, use and release. The common compounds in the cycle are N2, NO2, NO3+, and ammonia. There are several routes for nitrogen to return to the soil:

• The most dramatic is through lightning. Each lightning bolt chhanges atmospheric nitrogen and oxygen into nitrates or NOx compounds which are washed in to the soil by rain.
• Legumes (plants like beans and peas) fix nitrogen from the air using bacteria in their roots, The nitrogen compounds are released when the plant dies.
• Animals incorporate nitrogen into their protein when alive. The nitrogen is released when they decompose
• Sewage and manure are rich sources of nitrogen components when added to soil
• Commercial fertilizers contain ammonia compounds and nitrates

Answer 3

Nitrogen can be placed back into soil through the use of commercial fertilizers. It may also show up from matter decaying in the soil.

Answer 4

By nitrogen 'fixing' bacteria, it puts nitrogen in the atmosphere into the soil.

Answer 5

The nitrogen returns to the soil by death and decay of organic matter and also by nitrifying bacteria