A data-arranging method similar to that of a RAM disk is adopted for a ROM disk to make the ROM disk highly compatible with the RAM disk. The III-nitride substrate is characterized by a first conductivity type and a first dopant concentration. A quick connect coupler is mounted to the rear end of the frame for mounting the defacer to a quick hitch coupler on the lift arm mechanism of a tractor. The measurements assess at least one quality of service indicator associated with the performance of the computer network. An alternate embodiment of this invention includes supplying chelated manganese in addition to the chelated zinc.