Model that describes the movement of nitrogen in its many forms between the hydrosphere, lithosphere, atmosphere and biosphere.

Worldwide circulation and reutilization of nitrogen atoms, chiefly due to metabolic processes of living organisms; plants take up inorganic nitrogen and convert it into organic compounds (chiefly prot [..]

chemical circulation of Earth's nitrogen through the atmosphere, soil, and living and decaying organisms.

A continuous series of natural processes by which nitrogen successively passes through air, soil, and organisms involving principally organism decay, nitrogen fixation, nitrification, and denitrificat [..]

The sequence of biochemical changes undergone by nitrogen as it moves from living organisms, to decomposing organic matter, to inorganic forms, and back to living organisms.

cycling of nitrogen from the air and soil to plants, animals, and then back to the environment. Bacteria, legumes, and algae convert atmospheric nitrogen into nitrates that enter plant roots before turning into protoplasm that decomposers eventually break down again.

The natural circulation of nitrogen among the atmosphere, plants, animals, and microorganisms that live in soil and water. Nitrogen takes on a variety of chemical forms throughout the nitrogen cycle, including nitrous oxide (N2O) and nitrogen oxides (NOx).

series of flows in an ecosystem which move nitrogen between various stores and allow it to perform functions essential for life. At its simplest level, nitrogen in the form of nitrates is taken in by [..]

The passage of nitrogen through various valence states, as the result of reactions carried out by a wide variety of different organisms.

how nitrogen moves and is transformed between nitrogen gas, ammonium, nitrate, and nitrite ions

A set of processes in which nitrogen – in various states – moves between the atmosphere, soil and organisms. The flow of nitrogen through the cycle is largely driven by bacteria.

continuous movement of nitrogen through Earth, its atmosphere, and the living things on Earth. nodule -

The circulation of nitrogen in nature, consisting of a cycle of chemical reactions in which atmospheric nitrogen is compounded, dissolved in rain, and deposited in the soil, where it is assimilated and metabolized by bacteria and plants, eventually returning to the atmosphere by bacterial decomposition of organic matter.

the continuous trapping of nitrogen gas into compounds in the soil and its return to the air.

The natural process by which certain bacteria turn harmful ammonia, from fish waste and other decaying matter, into nitrite and then into less harmful nitrate.

nitrogen cycle is the process wherein nitrogen is converted to different chemical forms.

The circulation of Nitrogen in Nature, consisting of a cycle of biochemical reactions in which atmospheric Nitrogen is compounded, dissolved in Rain, and deposited in the Soil, where it is assimilated [..]

The cycle of life, death, and decay involving organic nitrogenous matter is known as the nitrogen cycle. In the nitrogen cycle ammonia is produced from proteins.

The process by which nitrogen passes through the ecosystem.

Basic principles of the nitrogen cycle is this: N2 is most abundant gas in atmosphere (78%) nitrogen-fixing bacteria convert it to NH3 nitrate-forming bacteria combine NH3 with oxygen to form NO2 and then NO3 Plants absorb and make NH4 consumers eat plants Nitrogen re-enters the environment when these organisms die, shed, urinate, produce excrement [..]

The sequence of biochemical changes undergone by nitrogen as it moves from living organisms, to decomposing organic matter, to inorganic forms, and back to living organisms.

The circulation of nitrogen among the atmosphere, plants, animals, and microorganisms that live in soil and water.

the process in which nitrogen circulates among the air, soil, water, plants, and animals in an ecosystem

The natural circulation of nitrogen, in which atmospheric nitrogen is converted to nitrogen oxides by lightning and deposited in the soil by rain, where it is assimilated by plants and either eaten [..]