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Distribution and availability of copper fractions to wheat from some loess derived alkaline calcareous soils

Published online by Cambridge University Press:  27 March 2009

Rahmatullah M. Salim  and
S. A. Sultana
Rahmatullah M. Salim
Affiliation:
Land Resources Section, National Agricultural Research Centre (PARC), Islamabad, Pakistan
S. A. Sultana
Affiliation:
Land Resources Section, National Agricultural Research Centre (PARC), Islamabad, Pakistan
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Extract

Copper has been identified as a deficient micronutrient in many alkaline calcareous soils of Pakistan (Kausar et al. 1979; Anon. 1986b). Copper extracted with DTPA from several soils of Pakistan correlated significantly with organic matter and free CaCO3 content (Kausar et al. 1979). Both soil organic matter and CaCO3 content have been reported by Viets (1962) to be among several other factors that affect Cu solubility and hence the Cu nutrition of plants. Working with temperate acid soils, several investigators (McLaren & Crawford, 1973; Shuman, 1979) have recently used different extractants and indicator plants to characterize the chemical pools which appear to control plant available Cu. Shuman (1979) separated various soil fractions and determined their Zn, Cu and Mn content. However, the distribution of Cu among various fractions in alkaline calcareous soils of arid regions has received little attention. The object of the present study was to investigate the relationship between the Cu content of wheat, and native soil Cu and applied Cu. The contribution of Cu in various soil fractions towards plant uptake and that extracted by different reagents was also ascertained.

Type
Short Notes
Information
The Journal of Agricultural Science , Volume 111 , Issue 3 , December 1988 , pp. 529 - 532
Copyright
Copyright © Cambridge University Press 1988

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