Leaching of Terbuthylazine and Bromacil Through Field Soils
作者： Inbar Toiber-Yasur , M. Rosner , Aviva Hadas , D. Russo , B. Yaron
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摘要: A field experiment was designed to provide data on the effect of soil heterogeneity distribution herbicides following leaching by irrigation and rain water. Terbuthylazine bromacil, two nonconservative herbicides, together with CaBr2, a conservative chemical, were used in reported experiment. The experimental consisted noncultivated 175-m2 plot which 20 observation points randomly selected. hundred ten centimeters rainwater applied periodically sampled for chemical distributions. spatial variability determined measuring Ks (saturated conductivity) α (Gardner parameter). Auxiliary laboratory experiments performed define adsorption-desorption chemicals studied these soils. Results terbuthylazine bromacil redistribution depth 120 cm during are shown. Bromacil leached greater extent than terbuthylazine. differences among concentrations various cores may be explained terms properties variability. residual also 400 after 110 In some cores, zones showing relatively high concentration observed at depths 40–60 200–300 cm, respectively. This pattern could preferential flow solute studied.
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