https://unilib.phaidrabg.rs/o:7053 All rights reserved Zbornik radova Instituta za šumarstvo number: 22-23 startpage: 103 endpage: 109 In the article was studied the dependance of the leafing time (X1 = Y) of Persian walnut (Juglans regia L.) from the geographic latitude (X2), longitude (X3) and altitude (X4) of the populations grown in 14 large regions in Yugoslavia. The analysis of the variance has shown that the variability of the phenophase of walnut leafing is much more expressed and depends much more on the year of observation than on the region. The multiple regression analysis has shown that the beginning of leafing of this species is in a very strong multiple link correlation with the combination of the values of geographic latitude and altitude of the analyzed regions (R = 0,8545, F = 14,89*** with 2 and 11 DF). It can be estimated by means of the parameters of the following equation: Yx = -55,1006800 + 3,5454215 X2 + 0,0276970 X4 The geographic latitude has a greater influence on the beginning of walnut leafting than the altitude, while the geographic longitude has not shown any influence on this phenophase. ZAVISNOST VREMENA POČETKA OLISTAVANJA OBIČNOG ORAHA (JUGLANS REGIA L.) OD GEOGRAFSKOG POLOŽAJA I NADMORSKE VISINE POPULACIJA DEPENDANCE OF LEAFING TIME OF PERSIAN WALNUT (JUGLANS REGIA L.) FROM GEOGRAPHIC POSITION AND ALTITUDE OF POPULATIONS Institut za šumarstvo info:eu-repo/semantics/article application/pdf 2699481 bytes 1984 Marković, Ljubisav srp