Land Capability Classification for Non-Rice Crops in Basaltic Soils in Eastern Cambodia
Land capability was determined for non-rice crops (maize, soybean, mung bean, sesame and peanut) for the main soil-landscape mapping units on basaltic terrain in Ou Reang Ov district, Kampong Cham province. Limiting factors were identified, and land qualities rated for the soil types identified previously in a soil survey of the district. The main Soil groups on the basaltic uplands are Labansiek, Ou Reang Ov and Kompong Siem. On the Labansiek soils, most of the land qualities were rated as favourable, and generally non-limiting. Overall land capability was rated as fair to good (Class 2-3), depending mostly on low soil pH and perhaps erosion risk. Overall land capability of the Ou Reang Ov Soil group was rated as fair (Class 3), depending mostly on low soil water storage and perhaps sub-soil pH, poor soil workability and crusting. The poor soil workability could be upgraded with the use of tractor drawn tillage rather than animal draft. Similarly the severity of limited soil water storage in the profile depends on seasonal rainfall and is likely to vary between the early and main wet seasons, and between years. Overall land capability on Kompong Siem soils was rated as good to fair (Class 2-3), depending mostly on waterlogging, which in turn can vary with growing season and among years. Despite a range of different limiting factors, the clayey soils which are commonly found in eastern Cambodia associated with basalt appear to have fair to good capability for cropping.
|Murdoch Affiliation:||School of Environmental Science|
|Series Name:||CARDI Soil and Water Science Technical Note No. 08|
|Notes:||Report for ACIAR LWR1/2001/051|
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