Warunki meteorologiczne a plonowanie ziemniaków średnio wczesnych

On the basis of 8 years (1993-2000) data from Research Station Wrocikowo at north part of Poland the investigations on the impact of meteorological factors on yields of medium-early varieties (Glad, Kolia, Maryna) of potato were conducted. The role of independent variables played: mean temperatures, sum of precipitation, solar energy and sum of sunshine hours as well as insufficiency of air humidity. The variability of yields of potato ranged from 179 dt/ha to 729 dt/ha and it was caused by different weather condition during the vegetation periods. It was found the significant simple correlation between mean temperatures of July and August and yield of Maryna variety. Sum of precipitation in July correlated significantly with yields of Kolia variety as well as sum of precipitation in August correlated with yields of Maryna variety. Significant multiple regression occurred in case of yields of Glada variety. The equation of regression consisted of variables: mean temperatures sum of precipitation, solar energy and sum of sunshine hours.