Response of Yield and Yield Components of Tef [Eragrostis tef (Zucc.) Trotter] to Tillage, Nutrient, and Weed Management Practices in Dura Area, Northern Ethiopia
Table 4
Pooled data analysis (2008-2009) results of the separate and interaction effects of the treatments on yield and yield components of tef crop.
Treatment
TL
PH (cm)
PL (cm)
GY (t ha−1)
AGB (t ha−1)
HI (%)
Tillage (T)
Conventional tillage (6 times) passes =T1
4.4c
83b
14b
1.2b
4.9c
0.24b
Four times tillage passes = T2
5.9a
100a
22a
1.7a
6.0a
0.28a
Reduced tillage (single tillage pass) = T3
4.7b
83b
16b
1.2b
5.3b
0.23b
Fertilizer (F)
No fertilizer = F1
4.3c
66e
13c
0.81d
3.9d
0.21b
23 kg N ha−1 = F2
6.4b
87d
19b
1.1c
6.1c
0.18c
23 kg N ha−1 and 10 kg P ha−1 = F3
6.8a
103a
22a
1.7a
7.4a
0.23a
23 kg N ha−1 and 2.5 t ha−1 manure = F4
6.7a
97b
21a
1.4b
6.6b
0.21b
2.5 t ha−1 manure = F5
6.4b
93b
19b
1.1c
6.0c
0.18c
Weed control practices (W)
Hand weeding = W1
6.6a
94a
21a
1.6a
5.5a
0.31a
2,4D at 0.75 kg ha−1 at five-leaf stage = W2
6.1b
87b
18b
1.3b
4.4b
0.30a
2,4D at 0.75 kg ha−1 at six-leaf stage = W3
5.3c
82c
15c
1.0c
4.0c
0.25c
2,4D at 150 kg ha−1 at five-leaf stage = W4
5.3c
84c
14cd
1.1c
3.9cd
0.28b
2,4D at 150 kg ha−1 at six-leaf stage = W5
4.6d
78d
12d
1.0c
3.6d
0.28b
Interaction
T × F
*
*
**
**
**
*
T × W
*
ns
*
*
*
*
F × W
ns
*
*
**
*
ns
T × F × W
**
**
**
**
**
*
Means within columns with different letters are significantly different at . Significant at the 0.05 probability level; significant at the 0.01 probability level; ns: nonsignificant at . × indicates interaction; TL: tiller number per plant counted just before harvesting; PH: plant height; PL: panicle length; GY: grain yield; AGB: above ground biomass yield; HI: harvest index.