Quantification of Chemical Fertilizers Residues in Soil and Water samples Collected around Agricultural areas of Mysore Taluk, Karnataka, India

Water resources in many parts of the Mysore Taluk are suffering from water quality degradation due to intensive agricultural activities. The nutrients entry into water resources by leaching and surface run-off from agricultural fields helps to assess the impact of Agrochemicals on the aquatic environment. Hence, the present study has been carried out with an objective to assess the effect of chemical fertilizer application in relation to nutrients contamination in surface and ground water resources. During the study, 15 soil samples and 15 water samples were collected from bore wells and lakes around agricultural areas of Mysore Taluk. From the experimental results, it can be observed that,in all the water samples, nitrate and phosphate concentration was found to be higher than the WHO standards. Most of the soil samples were found to be acidic in nature and the depletion of cations was observed. Phosphate level was found to be higher in all the sampling areas, which was due to over-use of phosphate fertilizers. The total nitrogen and nitrate concentrations were found to be higher, compared to the non-agricultural soil samples. From the study, it confirms that, the application of chemical fertilizers has greater influence on soil and water quality.