Read e-book online Advances in Agronomy PDF

By Donald L. Sparks

Advances in Agronomy is still famous as a number one reference and a chief resource for the most recent examine in agronomy. As continually, the themes coated are different and exemplary of the myriad of material handled via this long-running serial.

  • Maintains the top influence issue between serial guides in agriculture
  • Presents well timed studies on vital agronomy concerns
  • Enjoys a long-standing recognition for excellence within the field

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Calculation of a difference spectrum should effectively remove contributions at the target wavelength to improve quantification of allophane/imogolite content in the sample, thereby minimizing concerns expressed by Joussein et al. (2005). , 1974). The greatest focus of metal oxide FTIR investigations has been on iron oxide structures and properties. Aluminum and manganese (Mn) oxides can be observed with IR spectroscopy as well, although Mn oxides have been received the least attention. 10. Although similarities exist, the ATR-FTIR and DRIFTS spectra can be quite different in band ratios and peak width, due primarily to the differences in the interaction of the sample with the IR beam and the depth of beam penetration into the sample.

The XRD analysis also corrobated the presence of gypsum in the weather limestone. Furthermore, microRaman enabled the observation of minor differences in the weathering processes arising from specific weathering conditions. e. hexa- and pentahydrites) and niter were observed only in the efflorescence of structures weathered indoors. The assignment of the magnesium sulfate hydrates was based on the extensive Raman study of this series of hydrates by Wang et al. (2006). The effectiveness of micro-Raman in the investigation of weathering products is also evident in a study of soils present at an abandoned zinc and lead mine by Goienaga et al.

2008) assigned the band at 670 cm−1 to inplane OH bending, 633 cm−1 to the Fe–O stretch, 497 cm−1 to the asymmetric stretch of Fe–O, 450 cm−1 was assigned to the Fe(III)–OH stretch, the Fe–OH asymmetric stretch appears at 409 cm−1, and two Fe–O symmetric stretches arise at 361 and 268 cm−1. 10 are the peaks associated with OH stretching (3153 cm−1), in-plane OH deformation (839 cm−1), and out-of-plane OH deformation (794 cm−1) (Russell and Fraser, 1994). 85 mol. %. , 2008). , 2008). Similar work investigating the effect of Al substitution on hydroxyl behavior during the dehydroxylation of goethite was conducted by Ruan et al.

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