Assessment of the influence of weather factors on the quantitative indicators of sweet cherry fruits by Ridge regression

Sweet cherries are a favourite stone crop among consumers of fruit products. At present, the demand for sweet is growing, which encourages expansion varietal range crops with different ripening periods. The purpose this study was to develop mathematical model predicting formation and cherry pyrene mass depending on weather factors characteristics. conducted during 2008–2019 in conditions Southern Steppe zone Ukraine 33 varieties early, medium, late average over years research 8.41 g, 0.56 g. Late-ripening had best (7.27–12.18 g). According maximum fruit, Kazka, Dilema, Kosmichna were distinguished. Erlise, Pervistok, Melitopol black Krupnoplidna lowest fruits. In group early ripening, ratio pulp found Kazka variety, medium-ripening – Cordia, Perviystok, Orion, late-ripening Udivitelna, Krupnoplidna, Prazdnichna.The smallest variability early-ripening detected mid-ripening Temp, Regina, while Rubinova Rannia, Vynka respectively. Weather dominant influence all under study, characteristics effect mass. provided by indicator number days precipitation May exceeding 1 mm, medium monthly amount June. Decisive importance fruits May, middle period June, mm May.