A child resistant package for tablets is disclosed. The combine also comprises a cleaning assembly providing a second crop residue stream that engages a conveying assembly which mechanically conveys the second crop residue stream from the cleaning assembly to the straw chopper. Synthesis methods for such compounds, and ion implantation methods using such compounds, are described, as well as storage and dispensing vessels in which the isotopically-enriched, boron-containing compound is advantageously contained for subsequent dispensing use. A tape measure is secured using its attachment clip, which slides over the horizontal attachment shelf between the two opposing guide mounts, securing the clip between the shelf and the base plate.