The Grains Research Development Corporation (GRDC) is an agricultural research organisation with strong grower involvement, jointly funded by growers and government. GRDC contributes significantly to leading edge weed management for sustainable agriculture. See here for more information about the GRDC.
The GRDC are maintaining an Integrated Weed Management Manual, and of particular interest at harvest is section six.
Check out this article that contains advise and practical experience with the different harvest time weed seed management techniques.