Abstract
Authors studied the effect of copper nutrition on the yield, kernel weight and raw protein content of winter wheat. Copper was applied in the form of copper tetramine hydroxide that was produced from a clean copper containing waste originating from microelectronical industry. After suitable chemical transformation this waste can be used as an excellent secondary raw material for the preparation of copper fertilizer. The foliar application of copper tetramine hydroxide complex at the phenological phase of tillering significantly increased the yield, kernel weight and raw protein content of winter wheat. The calculated copper doses that gave the maximum yield, raw protein content and kernel weight were 1.04, 1.12 and 0.77 kg ha -1 respectively.
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