Composting is collecting organic material such as grass clippings, leaves, kitchen scraps and manure, putting them in layers and aerating them so they will decompose into fertile humus (a brown or black material formed by the partial decomposition of organic material in or on soil).
(a brown or black material; formed; by the partial decomposition of organic material in or on soil) (Composting; is collecting; organic material such as grass clippings, leaves, kitchen scraps and manure) (they; will decompose; into fertile humus)
a brown or black material Composting they
formed is collecting will decompose
by the partial decomposition of organic material in or on soil
organic material such as grass clippings, leaves, kitchen scraps and manure
into fertile humus