However, soil erosion was not prevalent in Type C and
D terraces, indicating that the banks and weed covers in
these terraces were effective in reducing soil erosion.
According to observations of bench terraces in Pang
Prarachatan village, rills and gullies were severe on bare
bench terraces but slight on terraces with erosion
controlling measures such as shoulder banks or weed
covers. Weed covers appeared to be particularly effective
for conserving soil erosion.