Im not 100% sure of the thrust of your post, but at the risk of boring you with stuff that may not be relevant, there MAY be something that sparks an idea below...

The Glenvar seed collection process has been aired here many times..Unfortunately it isnt necessarily obvious WHY it's being done..and Youtube posts are often big on supposed style , but light on any substance. Easy to assume that straw collection is the point.  It isnt.. http://www.youtube.com/watch?v=anqGtsl29R0

Chaff Carts http://www.grdc.com.au/director/events/groundcover?item_id=A5B55D1DED8B9C20860C0CDE8C6EE077&article_id=A9B58B24DE1EEFF38836AC41C5A9FA25

Harrington Seed Destructor http://www.ahri.uwa.edu.au/Farmers-and-agronomists/Newsletter/News-... I hope the links work if you want them to.