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Soil nitrogen availability under grassland and cultivated corn

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Summary

Adjacent corn and ryegrass plots were fertilized with rates of 0, 50, 100, 150, and 200 kg N as ammonium nitrate/ha. Corn growing on this soil did not respond to fertilizer N while ryegrass responded to rates of up to 200 kg N/ha. The differences in N availability was also reflected in the higher profile NO3−N under corn than under ryegrass. The same general trends occurred on a second soil, where N availability for the hay crop was also less than for corn crop. Compared with corn, hay responded more to N fertilizer and had lower soil NO3−N levels.

Grasslands appear to respond to higher N fertilizer rates than cultivated crops on the same soil.

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Authors and Affiliations

  1. Department of Plant and Soil Science, University of Vermont, 05405, Burlington, Vermont

    Frederick R. Magdoff

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  1. Frederick R. Magdoff
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Vermont Agricultural Experiment Station Journal Article No. 495.

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Magdoff, F.R. Soil nitrogen availability under grassland and cultivated corn. Plant Soil 68, 395–398 (1982). https://doi.org/10.1007/BF02197945

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  • DOI: https://doi.org/10.1007/BF02197945

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