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- W2012170259 abstract "Non-irrigated corn (Zea mays L.) produced on coarse-textured soils during droughty years can result in excess NO 3 available for leaching. To evaluate the effect of overseeding cereal rye (Secale cereale L.) into corn on yields, NO 3 leaching and a pre-sidedress nitrate test (PSNT), we broadcast rye seed (Aug. 1993, 1994 and 1995) into conventional tillage (CT) and no-tillage (NT) corn receiving six fertilizer N rates. There was no corn yield penalty with the cover crop. Corn grain yields and the extent to which NO 3 leaching was reduced by the rye cover depended on rainfall. With the rye (compared with no rye) subsoil solution NO 3 concentrations were: unchanged (fall 1994) following above normal rainfall and corn yields; reduced by 8 mg NO 3 N L −1 (fall 1995) following intermediate rainfall and yields; and reduced by 28 mg NO 3 -N L −1 (fall 1993) and 11 mg NO 3 -N L −1 (spring 1994) following the driest growing season (average of CT and NT). Improved N availability with the rye was detected by a PSNT under CT, but not under NT. Therefore sidedress N rates can be adjusted for release of rye residue-N under CT, and potential NO 3 contamination of groundwater can be reduced by overseeding winter rye into both CT and NT corn systems. Key words:Zea mays, Secale cereale, pre-sidedress nitrate test, tillage, nitrogen fertilization" @default.
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- W2012170259 date "1997-08-01" @default.
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- W2012170259 title "Overseeding rye into corn reduces NO3 leaching and increases yields" @default.
- W2012170259 doi "https://doi.org/10.4141/s96-072" @default.
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