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Differences in root and shoot growth and soil moisture extraction between cotton cultivars in an acid subsoil

C. W. KENNEDY, M. T. BA, A. G. CALDWELL, R. L. HUTCHINSON and J. E. JONES
Plant and Soil
Vol. 101, No. 2 (1987), pp. 241-246
Published by: Springer
Stable URL: http://www.jstor.org/stable/42936721
Page Count: 6
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Differences in root and shoot growth and soil moisture extraction between cotton cultivars in an acid subsoil
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Abstract

Research was conducted to determine if differences in yield and crop growth of field-grown cotton cultivars (Stoneville 825, Deltapine 41, Auburn 56, and Pima S-5) would be related to root length density and end-of-season soil moisture content in an acid soil. Soil core root density differences between cultivars were inconsistent between years. However, normalization of root density on a percentage of total root density basis indicated Stoneville 825 and Pima S-5 had a consistently greater percentage of roots in the acidic subsoil than did Auburn 56 and Deltapine 41. Subsoil moisture remaining at the end of the season was least for Stoneville 825 and greatest for Deltapine 41. Shoot growth parameters of Stoneville 825 were numerically and often significantly greater than Deltapine 41 each year. Auburn 56 was comparable or superior to Stoneville 825 and Pima S-5 in most parameters of shoot growth. Cotton cultivar differences in root length density and implied soil moisture extraction in acidic subsoil may partly explain differences in adaptation by some cultivars to nonirrigated, drought prone, acidic soils.

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