Mensurational factors in the seed production of Spruce

Abstract

Gives details of further investigations on the relation between cone production and the mensurational features of Picea abies stands in various forest types in the Archangel region [cf. FA 32, 2393]. Nearly 90% of the seed crop is produced by trees having a 'relative diameter' more than or equal to 1 [where 1 is mean d.b.h. of stand?].