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Grids in groud cover measurements

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Summary

Two methods for measuring the proportion of crop ground cover were compared. Both employed a rectangular grid of cords fitted in a frame at regular distances. One was based on the proportion of rectangles in which green area occupied more than half, and the other was based on the proportion of intersects coinciding with green area. The second method was accurate under all circumstances. Whereas the first method was found to give biased records when the smallest details in the canopy were small compared to the grid cell size. A theoretical estimate of the standard error of the intersect method was derived for homogeneous canopies and confirmed by experimental data.

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Authors and Affiliations

  1. Department of Plant Biology, University of Helsinki, Viikki, P.O. Box 27, 00014, Helsinki U, Finland

    J. T. Korva

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  1. J. T. Korva
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Korva, J.T. Grids in groud cover measurements. Potato Res 39, 533–540 (1996). https://doi.org/10.1007/BF02358472

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  • DOI: https://doi.org/10.1007/BF02358472

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