Pamphlets on Forestry, Volume 41991 |
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Page 402
... noted at the bases of the hill and mountain slopes which bound these tablelands . This remarkably distinct tension line seems to be due to a greater soil porosity , less grass growth , and a smaller alkali content , which are manifest ...
... noted at the bases of the hill and mountain slopes which bound these tablelands . This remarkably distinct tension line seems to be due to a greater soil porosity , less grass growth , and a smaller alkali content , which are manifest ...
Page 402
... noted in the vicinity of Fort Stanton , New Mexico , where a level plateau of nearly 8km ( 5 miles ) in length did not support a single tree , while similar plateaus on all sides , with less wind sweep and a coarser soil , showed ...
... noted in the vicinity of Fort Stanton , New Mexico , where a level plateau of nearly 8km ( 5 miles ) in length did not support a single tree , while similar plateaus on all sides , with less wind sweep and a coarser soil , showed ...
Page 424
... noted . In relation to plant growth , it is detrimental in that it prevents proper aeration of the substratum ( 39 , p . 346 ) . So far as the diffusion of gases is concerned , such substrata are less favorable than a free water surface ...
... noted . In relation to plant growth , it is detrimental in that it prevents proper aeration of the substratum ( 39 , p . 346 ) . So far as the diffusion of gases is concerned , such substrata are less favorable than a free water surface ...
Contents
The Huron River valley | 402 |
their development and ecological conditions | 360 |
The bogplant societies | 429 |
4 other sections not shown
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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