| Treatment | Alpha glucosidase | Acid phosphatase | Aryl sulphatase | Dehydrogenase | Total enzymes | GMEA |
| mg p-nitrophenol kg–1 soil h–1 | mg TPF kg–1 soil h–1 | mg p-nitrophenol kg–1 soil h–1 |
| |||
| Control | 25.8 | 25.6 | 22.5 | 75.14 | 74.1 | 8.50 |
| Full OFA | 32.3 | 29.6 | 26.1 | 96.09 | 88.0 | 9.27 |
| Full NPK | 25.0 | 35.4 | 22.0 | 69.32 | 82.4 | 8.96 |
| ½ OFA+ ½ NPK | 20.5 | 28.4 | 22.7 | 89.82 | 71.7 | 8.37 |
| Full OFA+ ½ NPK | 22.3 | 37.6 | 22.0 | 75.14 | 82.0 | 8.92 |
| LSD | 7.14 | 17.92 | 5.08 | 27.16 | 21.76 | 1.16 |