A box and whisker plot is a graphical method of displaying variation in a set of data. In most cases a histogram provides a sufficient display; however, a box and whisker plot can provide additional detail while allowing multiple sets of data to be displayed in the same graph. Some types are called box and whisker plots with outliers.
Can you compost Leylandii branches and hedge clippings - Yes. We were quite surprised to learn some experienced composters advise not to add Leyandii cuttings as they are apparently too acidic. Composting bacteria can remain active in all but the most acidic conditions.
To thin, prune selected branches throughout the shrub to the main trunk, to a lateral branch or to a lateral bud. The older and diseased branches can be pruned to the ground. This method of pruning allows the center of the boxwood to receive light and air, improving the health of the shrub.