Although nitrogen is very abundant in the atmosphere, it is largely inaccessible ... an ever-increasing impact on the global nitrogen cycle. Human activities, such as making fertilizers and ...

The cycle repeats when this crop is harvested (Figure ... nitrate can be converted to a gas by microbes and lost to the atmosphere through a process called denitrification. Nitrogen can be transported ...

Nitrogen gas makes up 78% of Earth’s atmosphere and is an essential element in amino acids and proteins. However, plants and animals cannot use nitrogen gas directly. Root hair cells have a long ...

Mars, one of our closest planetary neighbors, has fascinated people for hundreds of years, partly because it is so similar to ...

However, although our atmosphere contains plenty of nitrogen ... UK—investigated the nitrogen cycle in ancient stromatolites, ...

In the nitrogen cycle, phytoplankton and other marine plants ... driving it into the atmosphere and removing it from the oceans.

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Although nitrogen is very abundant in the atmosphere, it is largely inaccessible ... an ever-increasing impact on the global nitrogen cycle. Human activities, such as making fertilizers and ...