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Applied and Environmental Soil Science
Volume 2012, Article ID 608275, 9 pages
http://dx.doi.org/10.1155/2012/608275
Research Article

Effect of Management Practices on Soil Microstructure and Surface Microrelief

1Centre for Studies and Research on Agricultural and Environmental Risk Management (CEIGRAM), School of Agricultural Engineering, Polytechnic University of Madrid, Ciudad Universitaria s.n., 28040 madrid, Spain
2Faculty of Agriculture, Food and Natural Resources, Australian Technology Park, University of Sydney, Eveleigh, Sydney, NSW 2015, Australia

Received 1 December 2011; Revised 8 March 2012; Accepted 9 March 2012

Academic Editor: Philip White

Copyright © 2012 R. Garcia Moreno et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Soil surface roughness (SSR) and porosity were evaluated from soils located in two farms belonging to the Plant Breeding Institute of the University of Sidney. The sites differ in their soil management practices; the first site (PBI) was strip-tilled during early fall (May 2010), and the second site (JBP) was under power harrowed tillage at the end of July 2010. Both sites were sampled in mid-August. At each location, SSR was measured for three 1 m2 subplots using shadow analysis. To evaluate porosity and aggregation, soil samples were scanned using X-ray computed tomography with 5 μm resolution. The results show a strong negative correlation between SSR and porosity, 20.13% SSR and 41.38% porosity at PBI versus 42.00% SSR and 18.35% porosity at JBP. However, soil images show that when soil surface roughness is higher due to conservation and soil management practices, the processes of macroaggregation and structural porosity are enhanced. Further research must be conducted on SSR and porosity in different types of soils, as they provide complementary information on the evaluation of soil erosion susceptibility.