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POSSIBILITIES AND LIMITATIONS OF BLACK-AND-WHITE AERIAL PHOTOGRAPHS IN SOIL SURVEYING |
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| Authors: | HENRIK BREUNING MADSEN |
| Institution: | Geographical Institute, University of Copenhagen , Haraldsgade 68, DK-2100 , Copenhagen ?. |
| Abstract: | |
| Keywords: | Heathland farming system infield-outfield farming plaggenwirtschaft agricultural ecology flow of matter soil improvement conservation of heathland |