Conservation farming on steep lands - USAid

DEMONSTRATING CONSERVATION PRACTICES 21 1
(AII e r r
- s o
Benches )
I Bench
Terroors
6 C onvrrttblr Terraces
2 H~llstdr D~lches
7 Nolural Terraces
3 lnd~v~duol B a r ~ n ~
-8 Peragons
4.Orchord
Tmrrocrs
w
'0
lntrrmtrtmnr
Terraces
W U P OF H m
-\-
Figure 2. Cross-sectional view of eight types of land treatment structures.
basins, and cover crops lost 7 tons of soil per hectare per year, while plots
with cover crops alone lost 22 tons of soil per hectare per year.
Cost-beriefit analysis
In cost analysis it was found that one man-day was able to cut and fill
3 to 4 cubic meters of soil material. A D-6 bulldozer could move 40 cubic
meters in an hour. One hectare of hillside ditches on a 20-degree (36-percent)