Pamphlets on Forestry, Volume 41991 |
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Page 380
and ( 3 ) that when low temperature is combined with poor aeration the effect is very marked . This experiment was repeated with peas , and the same result was obtained , although the effects were not so marked ( fig . 13 ) . The roots ...
and ( 3 ) that when low temperature is combined with poor aeration the effect is very marked . This experiment was repeated with peas , and the same result was obtained , although the effects were not so marked ( fig . 13 ) . The roots ...
Page 383
... effect is to be correlated with lack of aeration of the substratum rather than with the acidity ; ( 2 ) that the same effect may be induced by lowering the substratum temperature ( the air temperature remaining the same ) , and thus ...
... effect is to be correlated with lack of aeration of the substratum rather than with the acidity ; ( 2 ) that the same effect may be induced by lowering the substratum temperature ( the air temperature remaining the same ) , and thus ...
Page 417
... effect upon the stem . 1. Small twigs of Quercus , Alnus , Carpinus , and Betula revealed upon the removal of the bark a striking and diagrammatic relation between the sheets of aggregate or compound tissue and the traces of the leaves ...
... effect upon the stem . 1. Small twigs of Quercus , Alnus , Carpinus , and Betula revealed upon the removal of the bark a striking and diagrammatic relation between the sheets of aggregate or compound tissue and the traces of the leaves ...
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