MgO Fertilizer Sole and Combined with Organic and Inorganic Fertilizers: Effect on Soil Chemical Properties, Turmeric Performance, and Quality in a Tropical Alfisol
Table 3
Effect of Mg fertilizer, PM, NPK fertilizer, and their combinations on soil chemical properties.
Treatment
pH (water)
Organic matter (%)
Total N (%)
Available P (mg kg−1)
Exchangeable K (cmol kg−1)
Exchangeable Ca (cmol kg−1)
Exchangeable Mg (cmol kg−1)
2017
2018
2017
2018
2017
2018
2017
2018
2017
2018
2017
2018
2017
2018
Control
5.71b
5.70b
2.52b
2.50b
0.17f
0.16f
9.2f
9.1f
0.19e
0.18e
1.19c
1.20c
0.30d
0.29d
PM
5.95ab
5.99ab
3.15a
3.20a
0.21d
0.22d
16.4d
17.1d
0.26c
0.27c
2.10a
2.21a
0.43c
0.45c
NPK 15-15-15
5.53b
5.51b
2.51b
2.52b
0.24bc
0.25bc
21.6ab
22.4ab
0.28ab
0.29ab
1.20b
1.20b
0.29d
0.29d
MgO fertilizer
5.96ab
5.98ab
2.52b
2.53b
0.19e
0.18e
10.8e
10.0e
0.20de
0.20de
1.26b
1.21b
0.46c
0.48c
PM + MgO
6.10a
6.30a
3.18a
3.20a
0.23c
0.24c
17.3cd
17.8cd
0.27bc
0.29bc
2.15a
2.26a
0.75a
0.79a
NPK + MgO
5.70b
5.71b
2.53b
2.50b
0.26a
0.27a
22.1a
22.6a
0.29a
0.30a
1.24b
1.26b
0.55b
0.56b
Values followed by similar letters under the same column are not significantly different at p = 0.05 according to Duncan’s multiple range test; poultry manure = PM.
