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

 

This chapter in PROCEEDINGS OF THE SECOND INTERNATIONAL TURFGRASS RESEARCH CONFERENCE

  1.  p. 149-154
     
    Proceedings of the Second International Turfgrass Research Conference

    Eliot C. Roberts (ed.)

    ISBN: 978-0-89118-573-4

     
    Published: 1974


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doi:10.2135/1974.proc2ndintlturfgrass.c21

Performance of bermudagrasses in the transition zone as affected by potassium and nitrogen1

  1. F.V. Juska and
  2. J.J. Murray

Abstract

The effects of K and N on winter survival, recovery, disease reaction, and turf quality of bermudagrasses (Cynodon spp.) were studied in 1971 and 1972. Applications of K decreased winter injury on Arizona common and ‘Tufcote’ but had little effect on the more winter-hardy cultivar ‘Midiron.’ “High” potassium and higher rates of NH4NO3 significantly increased bermudagrass recovery from winter injury and increased turf quality. Damage caused by a Helminthosporium sp. (leaf spot) was less pronounced on plots of Arizona common and Tufcote which had been treated with K. Midiron and ‘Tifgreen’ were resistant to this pathogen. Sclerotinia homoeocarpa F. T. Bennett (dollar spot) infestation was less severe on plots treated with K. Dollar spot infestation was greater on plots treated with ureaformaldehyde and 1.5 kg/100 m2 of NH4NO3 than on plots treated with 4.3 or 2.9 kg of NH4NO3. Additional index words: Nitrogen, Potassium, Helminthosporium, Sclerotinia, Cynodon spp.

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Copyright © 1974. Copyright 1974 by the American Society of Agronomy, Inc. and the Crop Science Society of America, Inc., 5585 Guilford Rd., Madison, WI 53711 USA

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