Question

Plant growth is limited by available nitrogen. Why is nitrogen fixation a limiting factor?

There is very little nitrogen available after fossil fuel combustion utilizes the available nitrogen.

Nitrogen must be produced by bacteria due to the inability of recycling by decomposers.

There is no nitrogen in the atmosphere; it is only found in aquatic biomes.

The stability of nitrogen gas makes it difficult to turn into nitrogen for living things

Answer 1

Answer: There is constant competition for limited nitrogen between the plants and the other organisms which form the ecosystem.

Rhizobia, are nitrogen-fixing bacteria that are present in root nodules of a plant, the limited availability of this bacteria also affects the nitrogen availability. The nitrogen present in the soil is in organic form which makes it limitedly available.

Explanation: The amount of nitrogen fixed and, subsequently, the degree to which growth in plants receives support depends heavily on the presence and functioning of nitrogen-fixing organisms.