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In the years between 1988 and 1990 field experiments whose aim was to define the influence of dosage and type of nitrous fertilizer on the yield and quality of the sugar beet root variety PN- -Mono 1 were conducted at the Agricultural Experimental Stalion-Felin. In the research conducted two fertilizers were studied: urea and a keratin-bark-urea granulate. Also studied were five dosages of nitrogen...
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