Improving Upland Acid Soil Properties And Increasing Maize Yield By Phosphate Rock Application With Organic Acids
Table 8
Effect of OAs application on yield of maize.
No.
Concentration of OA (ppm)
Type of OA
A1: citric acid
A2: humic acid
A3: succinic acid
A4: oxalic acid
Average
1
D0: 0
35.7 ± 1.4
41.7 ± 1.4
38.4 ± 1.4
36.5 ± 1.4
38.9 + 1.1a
2
D1: 25
38.3 ± 1.4
41.9 ± 1.4
42.8 ± 14
44.7 ± 1.4
42.8 + 1.1b
3
D2: 50
40.6 ± 1.4
44.10 ± 1.4
43.1 ± 1.4
44.3 ± 1.4
43.9 + 1.1bc
4
D3: 100
43.9 ± 1.4
46.8 ± 1.4
46.0 ± 1.4
47.0 ± 1.4
46.8 + 1.1c
5
D4: 200
40.5 ± 1.4
44.1 ± 1.4
43.1 ± 1.4
44.1 ± 1.4
43.9 + 1.1bc
6
Average
43.5 ± 1.0
43.1 ± 1.0
42.7 ± 1.0
43.8 ± 1.0
(—)
Data are presented as mean values of three replicates standard error of the mean (SEM) followed by the same letters are not significantly different (Duncan at ), (—): no significant interaction.
