Effect of the number of calcium chloride sprays on 'Jonagold' apple quality

摘要

The aim of this study was to examine effect of frequency of calcium chloride (CaCl_2) sprays on 'Jonagold' apple (Malus domestica Borkh.) quality. The experiment was car- ried out in 1996-1998 in the Experimental Orchard of the Research Institute of Pomo- logy and Floriculture in Skierniewice. Apple trees were grafted on M. 26 rootstock and planted in 1992 at a distance of 4 x2 m on a sandy loam soil with high available phosphorus, potassium and magnesium contents.