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Flattened Residue Effects on Wind Speed and Sediment Transport

Erosion and Soil & Water Conservation Group, Dep. of Environmental Sciences, Wageningen Univ., Nieuwe Kanaal 11, 6709 PA Wageningen, The Netherlands

View larger version (16K): [in a new window]   Fig. 1 Soil loss ratio as a function of the percentage of soil covered by non-erodible material (adapted from Bilbro and Fryrear, 1994)

View larger version (15K): [in a new window]   Fig. 2 Relationship between average wind speed (at 2.0 m) and soil flux ratio for 1000 and 1500 kg ha-1 of flattened pearl millet stalks (adapted from Sterk and Spaan, 1997)

View larger version (33K): [in a new window]   Fig. 3 Instantaneous horizontal wind speed (u) and saltation flux (S) vs. time for a typical wind erosion event on a sandy alfisol in southwest Niger on 27 June 1994

View larger version (14K): [in a new window]   Fig. 4 Probability density functions of horizontal wind speed u and threshold wind speed ut for a smooth surface condition (A and B), and a rough surface condition (C and D). Symbols U1 and U2 indicate two free-stream wind speeds, dashed lines indicate average wind speeds