Geopedological transects in karst landscapes in Campeche, Mexico.

Objective: To determine the spatial variability of landforms and their relationship with the soil geography of the state of Campeche, Mexico. Design/Methodology/Approach: Two transects were carried out under the geopedological approach, using soil mapping and geomorphology material at landscape level. Geomatic techniques were used for the correction process, mapping the landforms at scale of 1:100,000. Soil profiles were developed westwards, giving priority to the diversity of landforms, resulting in geopedological transects. Results: Plain landscapes (e.g., P and Lf) feature hydromorphic processes, their soil is deep and rich in organic sediments, and the soil units were classified within the Histosols and Gleysols groups. The transitional EBDe landscape does not have an apparent dissection, presents relatively convex landforms (with a slight slope), and has moderately deep and well-developed soils--classified within the Cambisols group. Finally, the EBPD landscape presents higher elevation and dissection; its soil is mainly shallow with scarce or null pedon development and is related to convex landforms, while the soil units belong to the Leptosols group. For the elevated plains landforms, a relationship with the Luvisols group was determined. Study Limitations/Implications: Understanding the geomorphology-soil relationships of a given region provides the basis for establishing soil distribution models--which will facilitate soil mapping and territorial planning. Findings/Conclusions: Campeche's reliefs have a great complexity at landform level. Developing and updating the cartography of the land will help to improve the planning of productive and conservation projects. [ABSTRACT FROM AUTHOR]