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This article in SSSAJ

  1. Vol. 31 No. 5, p. 700-704
     
    Received: Jan 30, 1967
    Published: Sept, 1967


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doi:10.2136/sssaj1967.03615995003100050025x

Cotton Seedling Taproot Elongation as Affected by Soil Strength Changes Induced by Slurrying and Water Extraction1

  1. H. M. Taylor,
  2. G. M. Roberson and
  3. J. J. Parker2

Abstract

Abstract

Elongation rates of cotton seedling taproots (Gossypium hirsutum) were evaluated in loose nonslurried and in slurried soils Soil strength increases were caused by slurrying and by increasing soil water suction from 1/5 to 1/3 or 2/3 bar. All of the resulttant penetrometer resistances, which varied from almost zero to 11 bars, frequently are found in arable soils. These soil strength increases caused large reductions in elongation rates. Consequently, soil strength should be considered as a prime factor affecting root growth rather than a condition limiting root growth only in unusual situations.

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