Comparisons of kieserite and calcined magnesite for sugar beet grown on sandy soils

摘要: Twenty-three experiments between 1968 and 1971 compared the effect of no magnesium, 50 100 kg/ha magnesium as kieserite 200 calcined magnesite, on yield uptake by sugar beet. On average, increased mean 7·55 t/ha 0·17 whereas magnesite it only 0·08 t/ha; fields with less than 15 ppm exchangeable fertilizers 0·34 0·10 respectively there was response to either fertilizer when soil contained more 25 magnesium. or in dry matter tops 0·091 0·040% roots 0·013 0·004% respectively. Giving element August 5·1 2·6 Differences pH did not influence from but they greatly affected magnesite. slightly acid soils, were almost equally effective at > 7·6 little taken up Glasshouse showed that grinding availability