Chapter 6
Downloaded by OHIO STATE UNIV LIBRARIES on June 29, 2012 | http://pubs.acs.org Publication Date: September 12, 2008 | doi: 10.1021/bk-2008-0997.ch006
The Effects of Soil Phosphorus and Nitrogen and Phosphorus Fertilization on Phosphorus Runoff Losses from Turfgrass 1
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Douglas J . Soldat , A . Martin Petrovic , and Harold M . van E s
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Department of Soil Science, University of Wisconsin at Madison, Madison, WI 53706 Departments of Horticulture and Crop and Soil Sciences, Cornell University, Ithaca, NY 14853 2
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Turfgrass accounts for a large percentage of land in urban and suburban areas and thus, it is important to understand the effects of turfgrass on surface water quality. Runoff from natural and simulated rain events was collected from a cool season turfgrass mixture on an undisturbed sandy loam soil for two years. Field plots with runoff collectors had different soil P levels as a result of prior fertilization practices. The treatments for this study were fertilizer application levels and included no fertilizer, nitrogen (N) only, phosphorus (P) only, or both N and P. Runoff volumes were measured and a subsample was saved for dissolved and total P analysis. Phosphorus losses were 0.05% of fertilizer applied for both dissolved and total P. Low mass losses of dissolved P were observed (
