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Nonpoint source pollution has been recognized as a primary cause of water pollution in the United States. Agricultural activities have been cited as the leading contributor of nonpoint source pollutants. Runoff and eroded sediment are the primary transport agents for agrichemical losses from agricultural fields. Conservation tillage has been promoted over the past two decades as a cost-effective agronomic practice that can reduce runoff and erosion from agricultural fields. The goal of this study was to compare the edge-of-field losses of waterborne substances from conservation tillage and conventional tilage plots both with and without the use of a winter cover crop under the corn-for-silage management program. Corn for silage is a prevailing practice in New England and comprises about 20 percent of the total acres harvested. Twelve field plots measuring 3.4 meters wide by 22.1 meters long with a 2.5 percent slope were equipped with an overland flow collection system. Runoff was monitored during the 1985 and 1986 growing seasons (June through November). Runoff samples were analyzed for sediment, nitrogen, and atrazine content. Runoff occurred on 22 out of 51 rainfall events that occurred during the study period. In all treatments, 57 to 62 percent and 70 to 77 percent of the runoff and soil

Influence of Tillage Systems and Winter Cover on Off-Site Losses of Sediment, Nutrients and Atrazine in Silage Corn Production