An elongate rotatable drum for use in a windrow turning apparatus is provided. The drum has paddles adapted to engage with material in a windrow. The paddles form at least one pair of opposed rows, each row being made up of a plurality of paddles defining a helical path along the drum, the helical path of the paddles the opposed paired rows promote movement of the material to a common focal area. Also provided is a composting machine incorporating the drum.
