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Cover: Stained preferential pathways in horizontal profiles created during a dye tracer study reported by Till Sander and Horst H. Gerke in “Preferential Flow Patterns in Paddy Fields Using a Dye Tracer,” p. 105–115. A 5-cm tracer pulse proceeded along topsoil shrinkage cracks and deep shrinkage cracks and biopores in the compacted pan down to the subsoil to more than the 1-m depth.
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