Pamphlets on Forestry, Volume 41991 |
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Page 382
Fifteen plants were grown in each condition . At the end of the experiment each had produced six to eight mature leaves . The leaves were measured as to length and breadth . An index was obtained by multiplying these two numbers ...
Fifteen plants were grown in each condition . At the end of the experiment each had produced six to eight mature leaves . The leaves were measured as to length and breadth . An index was obtained by multiplying these two numbers ...
Page 387
... plants were grown under properly aerated soil conditions , normal roots developed in place of the mycorhiza . That the acidity of the bog water has nothing to do with the production of mycorhiza is shown by the fact that in water ...
... plants were grown under properly aerated soil conditions , normal roots developed in place of the mycorhiza . That the acidity of the bog water has nothing to do with the production of mycorhiza is shown by the fact that in water ...
Page 417
... plants . This , however , does not invalidate the explanation here suggested . The bog habitat has been con- tinuous since early postglacial times ; only its position and extent have been variable . This same observation holds in the ...
... plants . This , however , does not invalidate the explanation here suggested . The bog habitat has been con- tinuous since early postglacial times ; only its position and extent have been variable . This same observation holds in the ...
Contents
The Huron River valley 351 | 351 |
their development and ecological conditions | 360 |
The bog plant societies | 429 |
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2d whorl 4th whorl abundant acidity aggregate ray Alnus aments annual ring apex Aronia basin bast fibers Betula bog areas bog plants bog societies bog water branches cambial activity cambium cassandra conifers creosote crystals cutting depressions diameter increase Dicotyledons drainage drained factors Fagales fiber bundles foliar ray forest formation glacial growth habitats HARTIG heartwood hickory Huron June lake larch Larix layers leaves lower Michigan moraine occur parenchyma parenchyma cells peat perianth periderm phloem pine Pinus piñon 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 tyloses undrained uniseriate rays vegetation vessels Viola blanda walls white oak wood xerophilous xylem zone μ μ μ