Table 3: Variation of toxins in soil with irrigation of different types of alum water.
|
Toxins in soil (ppm) |
Fe2+ |
Fe3+ |
Al3+ |
SO42- |
pH |
|
Land before watering (ppm)
Quality of irrigation water |
32 |
193 |
567 |
2.145 |
4.3 |
|
pH: 2.0; Al3+: 900 ppm; SO4²-: 1.17%; Fe2+: 1.500 ppm |
1.189 |
329 |
854 |
3.452 |
3.4 |
|
pH: 2.9; Al3+: 1.252 ppm; SO4²-: 1.01%; Fe2+: 1.300 ppm |
962 |
333 |
890 |
3.310 |
3.5 |
|
pH: 3.8; Al3+: 486 ppm; SO4²-: 0.6%; Fe2+: 650 ppm |
600 |
151 |
554 |
2.122 |
4.3 |
|
No watering |
14 |
521 |
695 |
2.229 |
4.1 |