May 16, 2011

Nitrogen cycle

Nitrogen CycleImage via WikipediaNitrogen cycle

Up Agriculture

For practical purposes, when you apply organic material to a soil for fertilization, you need to consider the ratio between C (carbon) and N (nitrogen) in the material. This ratio should not exceed 20:1 (C:N). When there is too much carbon in the material, the micro-organisms that decompose the organic matter need extra nitrogen for the buildup of their own cells and they will (temporarily) extract this from the soil. This article tells more about it and also gives the ratios for diverse organic materials. Also when you make compost you need to consider this ratio for the mix of materials that you use.

Articles general
  • Denitrification - "Denitrification is a microbially facilitated process of nitrate reduction that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products." - Wikipedia
  • Nitrification - "Nitrification is the biological oxidation of ammonia with oxygen into nitrite followed by the oxidation of these nitrites into nitrates. Degradation of ammonia to nitrite is usually the rate limiting step of nitrification. Nitrification is an important step in the nitrogen cycle in soil." - Wikipedia
  • Nitrogen cycle - "The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. This transformation can be carried out via both biological and non-biological processes. Important processes in the nitrogen cycle include fixation, mineralization, nitrification, and denitrification." - Wikipedia
  • Nitrogen fixation - "Nitrogen fixation is the natural process, either biological or abiotic, by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3). This process is essential for life because fixed nitrogen is required to biosynthesize the basic building blocks of life, e.g., nucleotides for DNA and RNA and amino acids for proteins. Nitrogen fixation also refers to other biological conversions of nitrogen, such as its conversion to nitrogen dioxide." - Wikipedia
  • Organic Materials as Nitrogen Fertilizers - "Organic materials usually are added to soils to provide such plant nutrients as nitrogen and to improve the physical nature of the soil. - Organic residues that have a low nitrogen content can cause nitrogen deficiencies in plants as microorganisms decompose the organic compounds. - Inorganic nitrogen must be added with some organic fertilizers to prevent nitrogen deficiencies in Crops" - Colorado State University
See also in Research topics
Up Agriculture

No comments:

Post a Comment

Share |