Minimising the weed seed rain reduces the size of the weed seedbank and consequently the populations of in-crop weed plants. This Arable Extra outlines the behavior of the weed seedbank, including seed half-life and dispersal.
Read Extra 135 Non-chemical weed management - harvest and the weed seedbank here
See also:
Extra 132 Integrated weed management
Extra 133 Weed management - getting the timing right
Extra 134 Mechanical weed management
Extra 136 Non-chemical weed management - stale and false seedbeds