Effects of Lime, Vermicompost, and Chemical P Fertilizer on Selected Properties of Acid Soils of Ebantu District, Western Highlands of Ethiopia
Table 3
Effects of the treatments on pH, exchangeable acidity and exchangeable Al, and percent acid saturation of soil in the incubation study.
Treatment
Rate
pH
Ex. Ac
Ex. Al
AS
cmolc·kg−1
%
Control
0
4.83j
2.38a
1.70a
30a
Lime (tons·ha−1)
2
5.20f–i
2.13bc
1.28c
23c
4
5.44c–f
1.15gh
1.12e
12g
6
6.01a
0.17l
0.33j
1.62j
Mineral P (kg·ha−1)
20
5.17ghi
2.36a
1.70a
27b
40
4.97hij
2.34a
1.71a
30a
60
4.95ij
2.38a
1.71a
30a
VC (tons·ha−1)
2.5
5.18ghi
2.18b
1.63b
20d
5.0
5.19f–i
2.05cd
1.57b
17e
7.5
5.46cde
1.99d
1.31c
16ef
Chemical P (kg·ha−1) + lime (4 tons·ha−1)
20
5.47cde
1.18g
1.14e
12g
40
5.48cde
1.16g
1.14e
12g
60
5.52cd
1.13ghi
1.10ef
12g
VC (tons·ha−1) + lime (4 tons·ha−1)
2.5
5.62bc
1.11ghi
1.04fg
9h
5.0
5.98a
1.00j
0.80i
8h
7.5
6.05a
0.45k
0.09k
3.3i
Chemical P (kg·ha−1) + VC (5 tons·ha−1)
20
5.24efg
2.04d
1.59b
17e
40
5.23e–h
2.07cd
1.57b
17e
60
5.67bc
1.71f
1.22d
14f
Chemical P (20 kg·ha−1) + lime (4 tons·ha−1) + VC (5 tons·ha−1)
—
5.94a
1.04ij
0.96h
8h
Chemical P (40 kg·ha−1) + lime (4 tons·ha−1) + VC (5 tons·ha−1)
—
6.00a
1.07hij
0.95h
8h
Chemical P (60 kg·ha−1) + lime (2 tons·ha−1) + VC (7.5 tons·ha−1)
—
5.86ab
1.13ghi
0.96h
9h
Chemical P (20 kg·ha−1) + lime (4 tons·ha−1) + VC (2.5 tons·ha−1)
—
5.50cd
1.13ghi
1.03g
9h
Chemical P (40 kg·ha−1) + lime (2 tons·ha−1) + VC (5 tons·ha−1)
—
5.32d–g
1.90e
1.16de
15ef
F–test
—
CV (%)
—
2.03
2.51
2.55
5.14
Means followed by the same letter within a column are not significantly different at ; significant at using Duncan’s multiple range test; Ex. Ac, exchangeable acidity; Ex. Al, exchangeable aluminium; AS, acid saturation; chemical P, chemical phosphorus; VC, vermicompost; CV, coefficient of variation.