The availability of copper to wheat plants
1986
Brennan, R.F. (Western Australian Dept. of Agriculture, Esperance)
The contact between soil and fertilizer copper decreased its availability to plants as measured by the uptake of copper into tops of wheat. The differences between soil types did not appear to be simply related to any one of the soil properties - pH, organic carbon content, clay content, free sesquioxides and levels of total and extractable copper. Reductions were generally greatest for soils higher in organic carbon content and free sesquioxides. The rate of reactions between copper and soil constituents appeared to be affected at least in some soils by soil pH, soil sterilization and addition of cereal straw. The availability of copper fertilizer for uptake by wheat plants declined linearly with time over 13 years of contact between the soil and applied copper. A steady decline in both copper concentration of the youngest emerged blade and copper content in shoots of wheat plants resulted with increasing time of soil contact.
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