Interaction of Inorganic and Organic Fertilizer Materials with Pesticides as Related to Water Quality in Soils

摘要

The chemical, physical, and mineralogical analysis of Dundee silt loam, Crowley silt loam, and Sharkey clay were completed. A study of the effect of 6 nitrogen rates for 5 sources of nitrogen upon the adsorption of prometryne, aldrin and fluometuron over four time periods was completed. The effect of (NH4)2SO4, NH4NO3 and Nitrana upon the diffusion of fluometuron in agar, glass beads and Crowley silt loam was also measured. Adsorption of pesticides increased as the time of fertilizer-pesticide interaction was extended. The greatest adsorption of aldrin and prometryne was by Sharkey, followed by Crowley and Dundee. Increasing rates of nitrogen increased or decreased adsorption depending upon changes in pH and salt content. The diffusion of fluometuron in Crowley silt loam was affected by nitrogen sources, rate, and time of interaction. The movement was ten times slower than in glass beads or agar, indicating that a soil-fertilizer-fluometuron interaction was present. The adsorption and diffusion of these pestcides was found to be a very critical function of pH, salt content, and time of interaction. (Author)