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The ability to accurately detect changes in topography will be especially useful for studying geomorphic processes , such as progressive sedimentation or trenching of alluvial fans , broad floodplain sedimentation patterns and delta exten-sion , formation and movement of large dune fields , and large-scale development of gullies - - e.g ., the type rapidly forming in steep , intensively cultivated terrains in Asia , Africa , and South America . It is quite normal to see healthy tissue right next to the diseased portions of the tissue . For mountain glaciers , high relief , high spatial variability , and rapid temporal variation may complicate the acquisition and interpretation of SAR interferometry data . Some outdoor plants such as vegetables in the tomato family and the cabbage family can also be affected . White mold , caused by the fungus Sclerotium , causes a crown rot in daylilies .