Deviation of the effective heat sum from the normal annual value as an assessment of climatic conditions of the vegetation period in the apple

Abstract

This paper proposes a new method for assessing the climatic conditions of the vegetation period in the apple, which can be used not only to characterize current-year climate conditions but also to forecast the quality of fruit during harvesting and their subsequent storage. To make a more detailed analysis of climatic conditions in the vegetation period, the effective heat sum is calculated for each month decade. The difference between the effective heat sum and normal annual temperature value or deviation from the average value is determined.