Harvest weed seed control

This option is relatively easy to adopt and has good results for farmers. Some of the downsides to this option include it being time-consuming; the high level of nutrient removal and the risk of fire escapes to name a few.

Download CAD design for NWB chute.

Chaff carts are towed behind harvesters at harvest with the aim of collecting the chaff fraction as it exits the harvester. There are a number of options to manage the chaff, including burning it or placing it in chaff dumps to be used as livestock fee

The Glenvar Bale Direct System was developed by the Shields family at Wongan Hills. Essentially, it consists of a large square baler directly attached to the harvester that produces bales from the chaff and straw residues at harvest.

Impact mills pulverise the entire chaff fraction, destroying 85% to 98% of the weed seeds that enter the impact mill.

Chaff tramline machines, like the EMAR chaff deck, are used in controlled traffic farming systems to divert the chaff fraction (containing weed seeds) onto permanent tramlines.

This cheap and simple solution involves creating a chaff chute which is attached to the back of the harvester to divert the chaff fraction (containing weed seeds) in a narrow row at the centre of the harvester instead of onto the tramlines, meaning it can also be used in non-CTF farming systems.