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The effect of soil organic matter on availability of zinc for plants was studied. The experiment material consisted of a set of 156 soil samples from Lower Silesia terrain and another set of 45 soil and plant samples collected from the wheat fields. All samples were tested for Zn content. Soil zinc was assayed using four methods: DTPA, EDTA, 0.1 mol HCl·dm⁻³ and 1 mol HCl·dm⁻³. The analysis of correlation...
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