Abstract
Relationships between soil parent material, landform, climate, vegetation and soils were defined in the field. Field studies were supported by an analysis of mineralogical, chemical and physical soil data. The various landscapes that together make the Central Clay Plain were delineated on a 1:2 000 000 pedogeomorphic map. Hypotheses on the sedimentation history of the aggradational plains were tested against data on geology, palaeoclimatology and palaeobotany in the literature. Soils, vegetation and landforms show the degradational plains to be pediplains in an advanced stage of planation.
Special attention is given to soil classification, soil genesis, the process of pedoturbation, and the origin and impact of relatively small differences in soil morphology. It was found that the climatic north-south gradient has a stronger influence on soil properties than differences in parent material between aggradational and degradational plains.
Original language | English |
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Qualification | Doctor of Philosophy |
Awarding Institution | |
Supervisors/Advisors |
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Award date | 12 Jan 1993 |
Place of Publication | Wageningen |
Publisher | |
Print ISBNs | 9789054850588 |
DOIs | |
Publication status | Published - 12 Jan 1993 |
Keywords
- vertisols
- soil surveys
- maps
- clay minerals
- sudan