The physical changes in soils of the Southern High Plains due to cropping and wind erosion and the relation between the sand + silt/clay ratios in these soils
1936
Daniel, H.A.
The mechanical analyses of a large number of cropping and virgin surface and sub-surface soils of the southern high plains were determined and compared with the sand, silt, and clay contents of the soil drifts. The greatest difference between drift material and the cropped and virgin surfaces occurred in the coarse- and medium-textured types. The drifts contained an average of 37.8% less, silt and clay and 29.3% more sand than the adjacent virgin soil. It was also found that the increase in percentage of sand in the drifts was of proportion to the amount of silt and clay removed by the wind shifting the soil. The sand + silt/clay ratios in these soils were compared to that in the drifts. The drift from the coarse-textured soils had the highest clay ratios and the clay soils the lowest; However, the data reported seemed to indicate that there was very little relation between the clay ratio and wind erosion.
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