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Cotton Seedling Taproot Elongation as Affected by Soil Strength Changes Induced by Slurrying and Water Extraction
Author(s) -
Taylor H. M.,
Roberson G. M.,
Parker J. J.
Publication year - 1967
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1967.03615995003100050025x
Subject(s) - penetrometer , soil water , taproot , elongation , seedling , agronomy , subsoil , sowing , environmental science , ultimate tensile strength , materials science , soil science , biology , metallurgy
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.