Conservation farming on steep lands - USAid

Figure 3. Major types of waterways, as described in table 2.
slope required about 80 man-days, whereas a hectare of 3-meter-wide bench
terraces on a 24-degree (45-percent) slope required 470 man-days to
complete.
Detailed cost and returns for cropping were published (3) and the annual
cost of terracing was examined (5). The annual cost of bench terracing
per hectare (including waterway) on moderate slopes was about US $175,
while the net returns of yams per hectare was about LJS $1,850. The yam crop