Mulch serves severalpurposes. It will not just suppress weeds and slow moisture evaporation, but should also break down into the underlying soil gradually and thereby improve the soil's texture. A layer of mulch helps moderate soil temperatures.
Plants generally concentrate their roots in and obtain most of their vital nutrients from this layer. The actual depth of thetopsoil layer can be measured as the depth from the surface to the first densely packed soil layer known as subsoil.
PAS 100 Approved - Compost is a key ingredient in organic farming. At the simplest level, the process of composting simply requires making a heap of wetted organic matter known as green waste (leaves, food waste) and waiting for the materials to break down into humus after a period of weeks or months.