Soil environmental constraints

Soil environmental constraints, based on an understanding of the soil processes and conditions that control the formation and transformation of metal species. 

Davis, A., Ruby, M. V., Bloom, M., Schoof, R., Freeman, G. Berstrom, P. D. 1996. Mineralo-gic constraints on the bioavailability of arsenic in smelter impacted soils. Environmental Science Technology, 30, 392-399. 

Hinsinger, E, Flassard, C.,Tang, C., and Jaillard, B. (2003). Origins of root-induced pH changes in the rhizosphere and their responses to environmental constraints A review. Plant Soil 248,43-59. 

The major differences between leaf-level and stand-level responses of photosynthesis to environmental constraints relate to differences in leaf area and its control. LAI is both a cause and a consequence of ecosystem differences in NPP. It is governed primarily by the availability of soil resources (water and nutrients) and by the time for recovery from past disturbances and other processes (e.g., herbivory) that remove leaves from vegetation. 

There is nothing especially illuminating about the analysis above, as it was covered in a previous reference . But it simply notes that one has to wash (dean), rinse, and dry parts as well as not get them dirty by contacting them with soil-laden solvent and not violate environmental constraints about disposal of soil-enriched solvent. But what this analysis does is to note how solvent is managed in an endosed vapor degreaser (not how parts are deaned ). 

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