Basic Biogeography |
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Page 30
... mineral fraction . A2 - leached layer ; percolating water has removed some mineral and organic particles to lower levels . The zone is often grey in colour due to loss of clay , iron or aluminium and the concentration here of quartz and ...
... mineral fraction . A2 - leached layer ; percolating water has removed some mineral and organic particles to lower levels . The zone is often grey in colour due to loss of clay , iron or aluminium and the concentration here of quartz and ...
Page 31
... mineral surface horizons L - Undecomposed litter . F - Partially decomposed litter . H - Well - decomposed humus layer , low in mineral matter . A Mixed mineral - organic layer . — Ap - Plough layer of cultivated soils . Ag - A horizon ...
... mineral surface horizons L - Undecomposed litter . F - Partially decomposed litter . H - Well - decomposed humus layer , low in mineral matter . A Mixed mineral - organic layer . — Ap - Plough layer of cultivated soils . Ag - A horizon ...
Page 212
... mineral layer . 13-23 cm : grey to medium brown sandy mineral layer with quartz crystals and mica flecks prominent . Some iron staining . 23 cm : parent material of grey Moine Schist boulders . At higher levels , 800 m and above , the ...
... mineral layer . 13-23 cm : grey to medium brown sandy mineral layer with quartz crystals and mica flecks prominent . Some iron staining . 23 cm : parent material of grey Moine Schist boulders . At higher levels , 800 m and above , the ...
Contents
Introduction | 3 |
Initial approaches to vegetation study | 11 |
Initial approaches to soil study | 28 |
Copyright | |
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acidic agricultural animals approach areas become biogeography biotic birch Britain British Isles brown earths Cairngorm Cairngorm Mountains Calluna changes chemical clay climatic climax community climax vegetation complex conservation coypus crop cycle deciduous deer dominant Ecol ecologists ecosystem energy environment environmental erosion example fire forest Forestry Forestry Commission gley soils grass grazing ground flora growth heather herbivores horizon humus important increase influence insect land landscape layer leached lichen litter methods mineral moorland moors mountain native natural nutrients oakwoods occur organic parent material pattern peat pedogenic pest pine pinewood Pinus plagioclimax plant communities plant cover podzol pollen population present produce quadrat Quercus recent regeneration region sample Scotland Scots pine Scottish Highlands seedlings shrubs slopes soil types stage structure surface Table temperature timber-line tree-line upland usually variations vegetation whilst wood woodland zone