Pamphlets on Forestry, Volume 41991 |
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Page 271
... activity . They have found , in general , that under forest conditions growth first begins in the youngest twigs and then proceeds downward into the older regions . Less work has been done on the cambial activity in isolated trees ...
... activity . They have found , in general , that under forest conditions growth first begins in the youngest twigs and then proceeds downward into the older regions . Less work has been done on the cambial activity in isolated trees ...
Page 272
activity began from two to four weeks later in the lower part of the trunk than in the twigs . As a result of extensive investigations , Robt . Hartig * advanced the idea that cambial awakening was dependent upon temperature and that ...
activity began from two to four weeks later in the lower part of the trunk than in the twigs . As a result of extensive investigations , Robt . Hartig * advanced the idea that cambial awakening was dependent upon temperature and that ...
Page 293
... activity . It is essential also to determine the period and extent of phloem and xylem formation in trees and the duration of cambium activity . Much more work remains to be done along this line . Such work is of especial importance in ...
... activity . It is essential also to determine the period and extent of phloem and xylem formation in trees and the duration of cambium activity . Much more work remains to be done along this line . Such work is of especial importance in ...
Contents
The Huron River valley | 402 |
their development and ecological conditions | 360 |
The bogplant societies | 429 |
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2d whorl 4th whorl abundant acidity Alnus aments apex apical shoot Aronia average basin bast fibers Betula bog areas bog plants bog societies bog water branches cambial activity cambium cassandra conifers creosote crystals cutting depressions diameter increase Dicotyledonous drainage drained factors Fagales fiber bundles foliar ray forest formation genera glacial growth habitats HARTIG heartwood hickory Huron June lake larch Larix layers leaves lobes lower mature Michigan moraine occur parenchyma parenchyma cells peat perianth periderm phloem pine Pinus piƱon Pinus rigida pith rays plant societies Platanus plates present Quercus radial region resin canals roots rows Salix sapwood scattered sclerenchyma sclerotic sedge shrubs sieve tubes soil species specimens sphagnum stem stone cells substratum surface swamp tamarack temperature thick tissue tracheids trees trunk twigs tyloses undrained uniseriate rays vegetation vessels Viola blanda walls white oak wood xerophilous xylem zone