Mineralization nitrogen role

Oxygen is by far the most abundant element in cmstal rocks, composing 46.6% of the Hthosphere (4). In rock mineral stmctures, the predominant anion is, and water (H2O) itself is almost 90% oxygen by weight. The nonmetaUic elements fluorine, sulfur, carbon, nitrogen, chlorine, and phosphoms are present in lesser amounts in the Hthosphere. These elements aU play essential roles in life processes of plants and animals, and except for phosphoms and fluorine, they commonly occur in earth surface environments in gaseous form or as dissolved anions. 

Another important relationship between the salts of the soil and corrosion has to do with biological activity. Since the growth of plants and microorganisms depends upon the proper inorganic mineral nutrients, the action of these forms of life varies with the mineral content of the soil. While many of the possible indirect effects, such as the role of various nitrogenous... 

Nitrogen solubility index is inversely related to protein level, i.e., as the protein level increases, NSI decreases (8). Another factor related to solubility of seed nitrogen in a flour and distilled water suspension is the concentration of water-soluble naturally occurring salts, since salt-soluble globulins are the major proteins found in peas (21). Also, differences in pea mineral content may play a role in NSI. 

The production of the siderophores ferricrocin (73), ferrirubin (74) and ferrichrome C (75) by 7 fortinii endophytes of Carex curvula was mentioned above. It appears that the endophytes can play a broad role in plant mineral nutrition, with access to metallic elements as well as the more frequently studied phosphorus, nitrogen and carbon. 

In a second experiment, we attempted to determine which nutrient elements gave the same quantitative response as the complete mineral nutrient solution. Results of this experiment demonstrated that nitrogen (NO3), phosphorus, and calcium, the elements applied in the field study, were the ones needed to produce a growth response quantitatively the same as the complete mineral nutrient solution. The need for repetitive application of these elements suggests that one or more may have a dual role, first as a nutrient and second as a soil conditioner that might exchange or complex with an Inhibitory molecule deposited in the soil by the herbaceous weeds. 

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