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In the study the authors determined the weed-killing properties of the keratin-bark-urea granulate applied in doses of 200 to 1500 kg/ha in pre-sowing and top-dressing applications, in fields of winter wheat, spring wheat, spring barley, and spring rape. It was found that the weediness of the crops studied depended solely on the dosage of the granulate applied, but was independent of the time of application...
In the paper the authors present the results of studies on the quantitative-qualitative relations of the weediness of oats and winter wheat, grown after winter wheat and spring rape respectively, fertilized the preceding year, in two terms, with 200 to 1500 kg/ha doses of the keratin-bark-urea granulate. It was demonstrated that the granulate in question caused only certain tendencies of changes in...
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