Effect of Mineral Nitrogen, Phosphorus, and Potassium Fertilizers on the Productivity of Faba Bean (Vicia faba L.) in Acidic Soils of Wolaita Zone, Southern Ethiopia
Table 5
Mean square values of the combined analysis of variance for the effects of year, mineral N, P, and K fertilizers application and their interactions on yield components and yield parameters of faba bean in Sodo Zuria District, southern Ethiopia.
Source of variations
Mean squares for yield components and yield variables
Degrees of freedom
AGB (t ha−1)
NPP
NSPP
GY (t ha−1)
SY (t ha−1)
HSW (g)
HI
Y
1
10.71
0.31ns
2.67
0.28
7.55
1,517.52
0.03ns
Y (R)
4
0.03ns
2.44ns
0.06ns
0.02ns
0.10ns
14.57ns
0.01ns
N rate
2
156.51
91.06
1.67
25.33
56.20
808.83
0.01
P rate
2
135.39
166.00
2.93
24.41
44.85
414.04
0.01ns
K rate
2
128.69
443.89
4.03
20.98
45.79
568.57
0.01
N rate × P rate
4
8.35
38.13
0.33ns
1.23
3.33
31.74
0.01ns
N rate × K rate
4
1.21
32.39
1.17
0.08ns
0.82
45.83
0.01ns
P rate × K rate
4
0.30ns
11.57
0.45
0.04ns
0.14ns
5.00ns
0.03ns
N rate × P rate × K rate
8
1.40
24.54
0.39
0.32
0.58
24.97
0.02ns
N rate × Y
2
0.02ns
10.89ns
0.57
0.06ns
0.01ns
3.11ns
0.01ns
P rate × Y
2
0.02ns
1.44ns
0.02ns
0.02ns
0.01ns
16.09ns
0.01ns
K rate × Y
2
0.01ns
2.04ns
0.06ns
0.05ns
0.02ns
24.38ns
0.02ns
N rate × P rate × Y
4
0.05ns
3.18
0.64
0.01ns
0.09ns
11.22ns
0.01ns
N rate × K rate × Y
4
0.04ns
2.26ns
0.12ns
0.01ns
0.05ns
1.83ns
0.02ns
P rate × K rate × Y
4
0.05ns
2.77ns
0.44
0.05ns
0.06ns
5.70ns
0.01ns
Error
104
0.18
1.16
0.14
0.06
0.14
9.97
0.01
CV (%)
5.56
9.72
11.13
7.09
8.90
3.16
9.01
Note: ns = not significant; ,, and significant at ≤ 0.05, 0.01, and 0.001, respectively; AGB, aboveground biomass; NPP, number of pods per plant; NSPP, number of seeds per pod; GY, grain yield; SY, stover yield; HSW, hundred seed weight; and HI, harvest index.