Abstract
Current public concern for the environment has focused on the environmental effects of chemical applications to turfgrass areas. There is little research on the environmental effects of nitrogen (N) applied to turfgrasses. Our objectives were to investigate the hydrology of 50 cm of undisturbed soil columns with a Kentucky bluegrass turf and intact macropores under a heavy (four 2.54 cm applications) and a light irrigation regime (sixteen 0.64 cm applications), and to measure the fate of N, using 15 N as a tracer, when applied to an undisturbed soil column. Mean leachate values for columns under the heavy irrigation regime totaled about six times the amount collected from columns under the light irrigation regime. We found that the heavy irrigation increased N, which leached through the 50 cm of undisturbed soil columns by 30 times and decreased the volatilization of liquid urea compared with columns under the light irrigation.
Published Version
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