Effect of soil erosion on physical properties of some soil series inNWFP, Pakistan
2003
Khan, F. | Ahmad, W. | Bhatti, A.U. | Khattak, R.A.,NWFP AgriculturalUniv., Peshawar (Pakistan). Dept. of Soil and Environmental Sciences
Taking into consideration the severity of erosion, a survey wasconducted during 1999-2000 to evaluate the effect of past soil erosion onthe physical properties of some soil series of Malakand agency andadjacent areas of district Charsadda. Six soil series with different degreesof erosion were selected. These consisted of: none to slightly erodedGuliana series, slightly eroded Sakhakot, Mansooka and Bahtar series,moderately eroded Missa series and severely eroded Rajar series. Soilsamples were collected from Ap, B and C-horizons and were analyzed forbulk density, total porosity, saturation percentage, available water holdingcapacity and organic matter. It was observed that sand content decreasedand clay content increased, while silt content showed inconsistent variation(either increase or decrease) with the increasing level of erosion. Bulkdensity increased significantly while total porosity, saturation percentage,organic matter and available water holding capacity (AWHC) decreasedsignificantly with the severity of erosion and from top soil to sub-soil. Tocontrol damaging effects of erosion, soil management and soil conservationpractices are suggested in the erosion prone areas of Missa, Bahtar andRajar series. Proper fertilizer management to correct nutrient deficienciesand good soil cover are recommended to improve physical conditions ofthese eroded soils.
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