![]() Infiltration rates in untilled soil were greater despite greater bulk density in both preferential flow zones and the non-preferential-flow matrix soil. Statistical analysis suggested no interactions between the preferential flow zone–bulk soil factor and the tilled–untilled factor. ![]() In comparison to untilled soil, tilled soil had more unaggregated soil, greater water content, and lower bulk density (1.16 vs. Root mass and total soil C were not significantly different. Compared with the bulk soil, preferential flow zones had more large and fewer small aggregates, greater water content, and lower bulk density (1.20 vs. ![]() Small cores were taken from dyed and undyed soil at the 10- to 25-cm depth. We used a 10-min pulse of dye to mark preferential flow paths at the end of 2 h of ponded infiltration. ![]() Preferential flow paths are common in both tilled and untilled soil, but how or why soil in preferential paths differs from neighboring bulk soil is not well understood in either. ![]()
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March 2023
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