Where trees and shrubs are used, leave a 1 m strip from the channel on either side for grass to regenerate to increase surface roughness for reducing water runoff and erosion
Pamene mitengo ndi tchire zagwiritsidwa ntchito, lekani mpata wa mita imodzi kuchokera pangalande mbali zonse kuti udzu umere ndi kuwonjezera kulimba kwa nthaka pochepetsa kuthamanga kwa madzi ndi kukoloka kwa nthaka