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Biological basis for the longevity of ulmus pumila in cultivation


, : Biological basis for the longevity of ulmus pumila in cultivation. Problemy Osvoeniya Pustyn' (5): 67-70

U. pumila L. is a wood breed that is long-lived in nature (in Central and East Asia), but as a rule short-lived in forest plantations in the southeast of the European part of the USSR and in West Kazakhstan. The conditions of U. pumila L. habitat in the long-lived natural plantations and in the short-lived artificial ones are analyzed. Two types of U. pumila L. drying in the cultures are separated. The drying causes and the ways of its prevention are considered (proceeding from U. pumila L. demands to the habitat conditions, revealed in the natural standing timber).

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