FIELD: forestry. SUBSTANCE: this method prescribes determining average perennial duration of period extending from beginning of vegetation till initiation of phenophase of mass maturation of fruits and prognosticating period of maturation of berries using formula which includes date of transition of diurnal average of air temperature in spring through point of 5 C and average perennial duration of period from start of vegetation till origination of phase of mass maturation of berries. EFFECT: more accurate data. 3 tbl
