Tillage and Simulated Rainfall Intensity Effect on Bromide Movement in an Argiudoll

Movement of Br ‐ in a Flanagan silt loam (fine, montmorillonitic, mesic Aquic Argiudoll) managed under five different tillage systems and subjected to three simulated rainfall intensities was documented. Under low (10 mm/h) and medium (25 mm/h) simulated rainfall intensities, movement of Br ‐ in the soil profile was not significantly different between moldboard plow, chisel plow, disk plow, para‐till, and no‐till systems. When subjected to a high simulated rainfall intensity, significantly greater Br ‐ movement occurred in the soil profile managed under continuous, long‐term no‐till. Greater movement of Br ‐ in the no‐till soil was attributed to preferential flow.