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.
It is very easy to avoid a compost fire. First, keep your pile small, if you have a lot to compost, make several small piles. Second, turn and water your pile regularly, if your pile is moist (but not soggy) it will not catch on fire. Third, during very hot parts of the year pay more attention to your compost pile. These three simple steps will keep your compost pile producing rich soil, instead of ash.