An important distinction must be made between hay for sale and hay for commerce. Hay for sale is often unanticipated surplus that is not used as feed for livestock. In this case, the producer puts on the market his surplus hay made because of more abundant harvests or by a reduction in his herd. Too often this hay is of lower quality because the cut is not done at the appropriate stage, the species are not the desirable ones or simply because the field must be emptied regardless of the result. As for commercial hay, it is a production planned with a view to trading it. As with any other commercial production, the producer plans in advance his production, the desired quantity and quality, as well as the marketing.