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| Titel |
Soil surface roughness and porosity under different tillage systems |
| VerfasserIn |
J. Rodriguez-Gonzalez, Antonio Saá-Requejo, J. A. Gómez, J. L. Valencia, P. Zarco, A. M. Tarquis |
| Konferenz |
EGU General Assembly 2012
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 14 (2012) |
| Datensatznummer |
250071584
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| Zusammenfassung |
| Both soil porosity and surface elevation can be altered by tillage operation. Even though the surface porosity is an important parameter of a tilled field, however, no practical technique for rapid and non-contact measurement of surface porosity has been developed yet. On the contrary, the surface elevation of tilled soil can be quickly determined with a laser profiler.
Working under the assumption that the surface elevation of a tilled field is a complicated superposition of the soil terrain profile at a larger-scale and the roughness at a fine-scale, this study included three aspects: (i) to establish an index (Roughness Index, RI) at a fine-scale to associate the surface roughness with porosity; (ii) to examine the correlation between surface porosity and the proposed RI by three types of tillage treatment in the field; and (iii) to check the scaling/multiscaling behavior among different grid sizes of calculating RI on predicting surface porosity. Consequently, the statistical results from each tilled plot show a strong correlation between the surface porosity and the defined RI in an early stage (ca. 2 days) after tillage.
Acknowledgements
Funding provided by CEIGRAM (Research Centre for the Management of Agricultural and Environmental Risks)and Spanish Ministerio de Ciencia e Innovación (MICINN) through project AGL2010-21501/AGR is greatly appreciated.
References
A.M.Tarquis, A. Saa-Requejo, J. Rodriguez-Gonzalez, J.A. Gómez and P. Zarco-Tejada. Spatial variability of Soil Surface Roughness Geophysical Research Abstracts, Vol. 13, EGU2011-13410, 2011.
A.M. Tarquis, J.L. Valencia, A. Paz-González and A. Saa-Requejo. Thresholding Soil Surface Images. Geophysical Research Abstracts, Vol. 13, EGU2011-13817-1, 2011. |
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