Basic Biogeography |
From inside the book
Results 1-3 of 23
Page 33
... clay in a sample . In assessing texture any coarse fragment such as gravel would first be removed to leave the ' fine earths ' fraction , material which will pass through a sieve with round holes 2 mm in diameter . In the field ...
... clay in a sample . In assessing texture any coarse fragment such as gravel would first be removed to leave the ' fine earths ' fraction , material which will pass through a sieve with round holes 2 mm in diameter . In the field ...
Page 34
... clay ' fine earths ' fraction . The USA Department of Agriculture uses slightly different size categories but the principle is the same . Once percentages are worked out for the ' fine earths ' fraction , the soil can be named by ...
... clay ' fine earths ' fraction . The USA Department of Agriculture uses slightly different size categories but the principle is the same . Once percentages are worked out for the ' fine earths ' fraction , the soil can be named by ...
Page 35
Nigel Pears. Clay percentage 30 60 70 80 90 100 Clay 10 20 30 40 Silt percentage 50 Silty . 50 clay Sandy clay 40 Clay loam Silty clay ' loam Sandy clay loam 20 Loam Sandy loam 10 Sand Loamy sand 100 90 80 70 60 50 Silt loam , 40 30 60 ...
Nigel Pears. Clay percentage 30 60 70 80 90 100 Clay 10 20 30 40 Silt percentage 50 Silty . 50 clay Sandy clay 40 Clay loam Silty clay ' loam Sandy clay loam 20 Loam Sandy loam 10 Sand Loamy sand 100 90 80 70 60 50 Silt loam , 40 30 60 ...
Contents
Introduction | 3 |
Initial approaches to vegetation study | 11 |
Initial approaches to soil study | 28 |
Copyright | |
9 other sections not shown
Other editions - View all
Common terms and phrases
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