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Nitrogen cycle

The natural circulation of nitrogen through soil, plants, animals, and the atmosphere, involving processes such as fixation, mineralization, and denitrification.

Related terms

  • Soil

    The upper layer of earth consisting of mineral particles, organic matter, water, and air, essential for plant growth and ecosystems.

  • Mineralization

    The microbial breakdown of organic matter, releasing nutrients like nitrogen and phosphorus into inorganic forms available to plants.

  • Denitrification

    The microbial conversion of nitrate into nitrogen gases (N₂, N₂O), resulting in nitrogen loss from soils.