Atrazine Leaching and Its Relation to Percolation of Water as Influenced by Three Rates and Four Methods of Irrigation Water Application

摘要

The California Department of Food and Agriculture, Environmental Hazards Assessment Program conducted a study to establish a relationship between the leaching of a pesticide and the amount of deep percolating water produced from irrigations. Water application treatments were expressed as a proportion of ETo enabling an assessment of the effectiveness of water budgeting in mitigating solute movement. In addition, the usefulness of ETo to index watering amounts was compared in four irrigation methods: sprinkler, basin, furrow and drip. The study was conducted on bare soil to produce a baseline data set that describes soil and water relationships in the absence of a crop that would subsequently be used to validate solute movement models.