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The results of two long-term experiments provided a basis to determining copper, manganese and zinc uptake by plants grown in crop rotation, and the concentrations of these elements in the soil. It was found that their mean uptake per cereal unit was as follows: Cu - 0.68 g; Mn - 5.78 g, Zn - 4.62 g. The application of manure and slurry, as well a combination of NPK fertilization and manuring, positively...
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