Effect of Wastewater Used for Irrigation on Profile Distribution of Nutrients Along River Salanta.

The study was carried out along the bank of River Salanta (Sharada) in Kano State, Nigeria. Three profile pits were excavated and four soil samples were collected based on profile depth of 30 cm intervals. Soil pH (>7) were slightly alkaline and non-saline, heavy metals (Cr, Ni and Pb) were within EU standard and Cd slightly exceeding. Soil micronutrients (Cu, Mn and Zn) were above their permissible limits with Fe within range. Waste water samples were collected through grab/catch method adjacent from each profile pit at the respective sampling locations, and analyzed for cations, anions, micronutrients and heavy metals. Irrigation water indicates that pH were slightly alkaline (7.25-7.28), EC mean values were non saline (1.98-2.13dSm-1), the concentrations of Na ranged as (5.33-6.90 cmol/l). The values of Cu and Mn were higher than the FAO limits while Fe and Zn were within range. Chromium, Ni and Pb were within the FAO permissible limits while Cd has been exceeded. Water parameters correlated significantly with soil chemical properties at some profile depths.