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This article in AJ

  1. Vol. 60 No. 2, p. 170-172
     
    Received: July 27, 1967
    Published: Mar, 1968


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doi:10.2134/agronj1968.00021962006000020008x

Field Evaluation of Corn Root Clumps1

  1. D. L. Thompson2

Abstract

Abstract

Corn root clumps were extracted from the soil with a potato digger and rated for size on a scale from 1 (small) to 5 (large). Root clump ratings were at a maximum approximately 1 month after flowering and subsequently deteriorated .14 rating (approximately 6%) per week. Correlations between ratings and root, stalk, and total lodging were -.59*, -.58*, and -.78**, respectively. Correlations bsetween ratings and root clump weights were .92** or larger. Ratings estimates for pooled additive genetic effects were large. An evaluation advantage was indicated for the tester with a small root clump rating. This root clump method is an efficient and relatively effortless procedure for evaluating corn roots for anchorage and related factors.

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