Class |
EC (dS/m) |
Quality characterization |
Soils for which suitable |
C1 |
< 1.5 |
Normal waters |
All soils |
C2 |
1.5-3 |
Low salinity waters |
Light and medium textured soils |
C3 |
3-5 |
Medium salinity waters |
Light and medium textured soils for semi-tolerant crops |
C4 |
5-10 |
Saline waters |
Light and medium textured soils for tolerant crops |
C5 |
> 10 |
High salinity waters |
Not suitable |
Crop |
Critical Stage for Irrigation / Moisture sensitive period |
Rice |
Panicle initiation, Flowering |
Wheat |
Crown-root initiation, Jointing, Milking |
Sorghum |
Seedling, Flowering |
Maize |
Silking, Tasseling |
Pearl millet |
Flowering, Panicle initiation |
Finger millet |
Panicle initiation, Flowering |
Groundnut |
Rapid flowering, pegging, Early pod formation |
Sugarcane |
Formative stage |
Sesame |
Blooming stage |
Sunflower |
Two weeks before flowering to two weeks after flowering |
Safflower |
From rosette to flowering |
Soybean |
Flowering and seed formation |
Cotton |
Flowering and boll development |
Tobacco |
Transplanting to full bloom |
Potato |
Tuber initiation to tuber maturity |