30
Table 1 (continued)
Crop
Site
Soil
Conventional
tillage (CT)
Minimum
tillage
Minimum tillage
with mulch
Zero
tillage
Raised
bed
Source
Yield change%
compared to
control – Teff
+0.8
−13.6
Wheat
Different soil
types
2255
2460
Ito et al. (2007)
Wheat
Holeta
Clay, Nitisol
1843
1406
1066
Adimassu et al.
(2019)
Wheat
May Zegzeg,
Tigray
Vertisol
3200
3400
Araya et al.
(2012)
Wheat
Vertisol
1610
2020
2460
Areya et al.
(2016)
Wheat
Kulumsa
Clay soil
3360
3390
Taa et al. (2004)
Wheat
Asasa
Clay loam
3216
3033
Taa et al. (2004)
Yield change%
compared to
control – Wheat
−0.1
Average percent change in yield is presented where there are at least data from three sites
J. B. Aune