The decline in the availability to plants of applied copper fertilizer [wheat]
1986
Brennan, R.F. (Western Australian Dept. of Agriculture, Esperance) | Gartrell, J.W. (Western Australian Dept. of Agriculture, Perth. Div. of Plant Research) | Robson, A.D. (Western Australia Univ., Nedlands. School of Agriculture)
The availability of copper sulfate for uptake by wheat plants declined linearly with time over 13 years of contact between the soil and the applied Cu for a yellow brown lateritic sandy earth in a semi-arid mediterranean environment. A steady decline in both the Cu concentrations of the youngest emerged blade (YEB) and Cu content in shoots resulted with increasing time of soil contact. For all Cu additions, a linear model was fitted to the decline in YEB Cu concentrations with time. This model predicts that Cu deficiency would be observed 18, 30 and 44 years after the application of the 2.75, 5.5 and 8.25 kg copper sulfate per ha at this site.
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