Amended soils elemental composition

Raven KP, Loeppert RH. Trace element composition of fertilizers and soil amendments. J. Environ. Qual. 1997 26 551-557. 

Elemental analysis is a common tool used for the characterization and differentiation of HS isolated from organic amendments and unamended and amended soils. It provides information on the distribution of major elements, typically C, H, N, S, and O, in HS, thus setting limits for HS possible molecular composition. The atomic ratios C/N, C/H, and O/C are also useful in identifying types of HS, monitoring their structural changes, and devising HS structural formulas (Stevenson, 1994 Senesi and Loffredo, 1999). 

The elemental composition and related atomic ratios of HAs and FAs isolated from some representative organic amendments of various nature and source, and unamended and amended soils are shown in Table 4.2. Although the elemental composition of HAs and FAs show significant variability on dependence on the nature, origin, and treatment of the amendment, they generally feature larger H, N,... 

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