How do plants and people get the nitrogen?

Question

explain clearly thanx...!

Answer 1

Certain bacteria were (see note) the ONLY source of organic nitrogen on earth. So by symbiosis or consumption, plants and animals get their nitrogen from bacteria.

interesting note: Humans have joined the club as the second type of creature able to produce organic nitrogen in 1908 when Fritz Haber figured out how to produce organic nitrogen (ammonia) chemically.

Answer 2

There isn't alot of nitrogen in soil in the first place which is why fertilizers are used. Most plants can't use free nitrogen gas so they need to be in a symbiotic relationship with a bacteria that fixes nitrogen and converts it into ammonia, which plants can use. Also, genetic engineering can introduce genes that allow the plants to use free nitrogen. Humans just get nitrogen through our diet.

Answer 3

Plants get nitrogen from the soil.
Nitrogen has to be put into the soil from the air, mostly through the action of nitrogen-fixing bacteria that live in nodules on the roots of certain plants called legumes (beans, peas, clover, ...)

People and other consumers must get nitrogen from the food we eat. We breathe in nitrogen from the air, but we breathe it right back out again. That nitrogen is not available for us to use. Nitrogen is in the proteins and some other molecules in our foods.

Answer 4

Plants absorb it through their roots. Animals just breath it in, most of air is nitrogen.