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.
Composting turns the organic waste you create into a useful product. Materials such as shredded leaves and grass cuttings, vegetable and fruit clippings, newspapers and coffee grounds --- in the correct ratios --- combine with air and water to begin a process of biological decomposition. The compost that results is useful for growing plants or as a soil amendment.