Well, to be honest, the mechanical harvest of perennial
polycultures does not exist so that's your answer on that
item
Not true at all. I have combined crops of mixed sized seed many times,
including prairie plots. Also certainly hay/silage harvest would qualify
as such. Many machines designed for one type of harvest can also be
adapted to other uses, blueberry harvesters are being looked at for
hazelnut harvest.
M
Mark P. Ludwig
Poultry Research Lab
University of Wisconsin -Madison
608-262-1730 WK
608-846-7125 HM