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Book: Proceedings of the Third International Turfgrass Research Conference
Published by: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America

 

This chapter in PROCEEDINGS OF THE THIRD INTERNATIONAL TURFGRASS RESEARCH CONFERENCE

  1.  p. 117-121
     
    Proceedings of the Third International Turfgrass Research Conference

    James B. Beard (ed.)

    ISBN: 978-0-89118-248-1

     
    Published: 1980


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doi:10.2135/1974.proc3rdintlturfgrass.c14

Comparisons of Direct and Indirect Determinations of Root Weights of Several Turfqrasses1

  1. W. Opitz Von Boberfeld

Abstract

Abstract

Extensive research is being undertaken at the Institute of Plant Cultivation of Bonn University on cultivating root mass of different cultivars of monocotyledon and dicotyledon species in various nutrition substances with regard to the selection of suitable methods for the simplification of root weight determinations for series investigations. As greater differences occurred among the investigated root masses, a homogenization of the variances is necessary to give a statistical interpretation. The log-transformation was considered suitable for eliminating such problems. Among plant material with a homorhized root system and a relatively short growth period, no relationship existed between ashed and non-ashed root mass or it is weak. Between the various sand-free and ash-free root masses and the corresponding C-content or ignition loss in the individual soil strata, no significant positive correlations occurred.

The relatively expensive root mass determinations, involving wide dispersons, cannot be simplified by foregoing either ashing the root mass or ascertaining the soil organic matter content without considerable lossof information.

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Copyright © 1980. Copyright © 1980 by the American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, and International Turfgrass Society, 5585 Guilford Rd., Madison, WI 53711 USA