Pathak, C., Chopra, A.K., Kumar, V. and Sharma, S. 2011. Effect of sewage-water irrigation on physico-chemical parameters with special reference to heavy metals in agricultural soil of Haridwar city. Journal of Applied and Natural Science. 3, 1 (Jun. 2011), 108–113. DOI:https://doi.org/10.31018/jans.v3i1.166.