Comprehensive analysis of nitrates, sulphates and agrochemicals in leachates from an intensive agriculture area - A case study in Croatia

To better understand the impact of conventional agricultural practices on soil and water resources, two main objectives were established in this study: to measure nitrate (NO3-) sulphate (SO42-) concentrations lysimeters drainpipes leachates response different nitrogen fertilization levels amendments identify organic contaminants that could have originated from long-term use agrochemicals historically intensive area Croatia. During two-year study period leachate samples collected drainpipes. Research results indicate NO3- content both increased with rising doses N fertilizer. The highest concentration SO42- was recorded treatment added phosphogypsum, while all other treatments low. Over 40% 287 target substances detected at least once during but only (IPC/propham carbosulfan) found above 0.5 μg/L. Additionally, three priority continuously present samples: atrazine, simazine isoproturon.