The two-dimensional smoothed power spectrum of the gravity field indicates that the cut-off frequency should be somewhere between 0.01 per km and 0.02 per km or the cut-off wavelength between 50 km and 100 km. Three examples from the set of regional
By linearization and following smoothing a local approximation of the Molodensky problem in gravity space is constructed. This problem may be solved in a closed way. The solution permits a series expansion with respect to cylindrical functions
, their total number per square meter is reduced to one half, and hairy mycorrhizae with abundant external mycelium are partly replaced by smooth ones. These results suggest that the new supply of nutrients following fertilization leads to a reduction