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W wyniku 8 letniego zróżnicowanego nawożenia potasem w latach 1976-1983 uzyskano gleby o czterech różnych poziomach zasobności w ten składnik (b. uboga, uboga, średnio zasobna i zasobna). Na każdej z tych gleb od 1983 r. stosowano 4 dawki potasu (0, 70, 140. 280 kg K/ha) w zmianowaniu trójpolowym: jęczmień jary, kupkówka, ziemniaki. W pracy tej zamieszczono wpływ badanych czynników na zawartość K...
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