I post the abstract of a new entry, landschaft, from the project on which I am working. This definition needs to be improved so it is a "beta" version. If you want to have detailed definition of this word, I suggest you to read (if not already done) James Corner's book Recovering Landscape: Essays in Contemporary Landscape Architecture, precisely his text "Eidetic Operation and New Landscapes".
Landschaft is employed to designate a mode of relationship between patterns of occupation, activities and space as well as buildings and fields. Landschaft, also, suggests an immediate admission of human impact on land. It differs from landscape in that landschaft means an occupied milieu which has been structured by effects and significance through tactility, use, engagement over time while landscape is the sensible aspect of the relationship between a society and space and nature. Precisely, landschaft, as James Corner writes in his text "Eidetic Operations and New Landscape", means not only territory but also community and polity while landscape is a collective form of subjectivity.
As James Corner mentions, landschaft thus differs from landskip since the last one means much more landscape as contrivance, primarily visual and sometimes also iconic or significant.
—> landscape, landscraping, urban re-use, environment
Corner James, "Eidetic Operations and New Landscapes", in Corner, James (ed.). Recovering Landscape: Essays in Contemporary Landscape Architecture. New York: Princeton Architectural Press, 1999.
Olwig Kenneth R., 1996. Recovering the substantive nature of landscape. Annals of the Association of American Geographers, 86 (4), 630-653.
Olwig, Kenneth R., 2002. Landscape, nature, and the body politic: from Britain's renaissance to America's new world. University of Wisconsin Press, Madison.
MacPherson Hannah. Landscape's ocular centrism beyond?.