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Effects of reduced tillage on soil surface properties affecting wind erosion in semiarid fallow lands of Central Aragón

AutorLópez Sánchez, María Victoria ; Gracia Ballarín, Ricardo ; Arrúe Ugarte, José Luis
Palabras claveDryland farming
Conservation tillage
Soil erodibility by wind
Soil surface properties
Fecha de publicaciónjun-2000
CitaciónEuropean Journal of Agronomy 12 (3): 191-199 (2000)
ResumenIn Central Aragón (NE Spain), where strong and dry winds are frequent all year round, fallow lands are susceptible to wind erosion due to insufficient crop residues on the surface and loose, finely divided soils by multiple tillage operations. Effects of conventional tillage (mouldboard ploughing followed by a compacting roller) and reduced tillage (chisel ploughing) on soil surface properties affecting wind erosion were studied during three experimental campaigns in a dryland field of Central Aragón. Reduced tillage provided higher soil protection than conventional tillage through a lower wind erodible fraction of soil surface (on average, 10% less) and a significantly higher percentage of soil cover with crop residues and clods (30% higher). Random roughness was also higher after reduced tillage than after conventional tillage (15% vs. 4%). These results indicate that reduced tillage can be an effective soil management practice for wind erosion prevention during the fallow period in semiarid Aragón. The study shows, likewise, that significant changes in soil aggregate size distribution associated with wind erosion processes may occur in short periods of time. Thus, temporal variability of soil surface properties, including crust and clods stability, needs to be considered in wind erosion research in agricultural soils.
DescripciónThe definitive version is available at: http://www.sciencedirect.com/science/journal/11610301
Versión del editorhttp://dx.doi.org/10.1016/S1161-0301(00)00046-0
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