Excerpt from Seed Stored in Cones of Some Jack Pine Stands, Northern Minnesota In both the 40-year-old and 70 to 80-year stands, the number Of cones produced increased with d.b.b. The limited data available also indicated that within a given stand, cone production increased as crown position increased in dominance. The amount Of viable seed stored in the cones varied from per acre in the 40-year un thinned stand to for thinned timber of this age. Intermediate were 70 to 80-year jack pine with and the plantations with per acre. This is a range of to pounds of germ inable seed, an amount which would be muchcones. But since there were more Older cones on the trees, they contributed almost a third of the viable seed. The lower yield Of viable seeds in Older cones was due in part to the fewer total seeds they contained and in part to the presence Of an appreciable number Of dead seeds, for empty seeds were no more numerous here than in young er cones. Dead seeds were Of no consequence in any Of the other cone lots tested except in one from a 130-year-old tree in which they amounted -to 7 percent. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Abstracts for Dec. 1954- issued in the Agricultural Research Service's series ARS-41.