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.
This is a pretty self-explanatory step-once you get the frame of your beds all laid out and make sure the concrete blocks are level, you can fill in with compost! I always fill mine to the top and level them out with a rake-the soil will settle a little bit so be generous.