Corn stover has potential as a bioenergy feedstock in North America. We simulated production
costs for stover harvest (three-pass and two-pass with baling or chopping, and
single-pass with baling or chopping) and on-farm storage (outdoor and indoor bales, outdoor
wrapped bales, and chopped stover in bags, bunks, or piles). For three- and two-pass
harvest, chopping was 33e45% more expensive than baling. For baling and chopping, twopass
harvest was 25% cheaper than three-pass. Single-pass chopping harvests were on
average 42% cheaper than three-pass or two-pass chopping. Single-pass baling was
cheaper (4e31%) than multi-pass baling at low rates of stover collection, but more
expensive (1e39%) at high rates of collection. For bales, outdoor storage of wrapped bales
was cheapest. Outdoor, unwrapped bale storage, even with 12% dry matter loss, was
cheaper than indoor storage. For chopped stover, storage in bags was always cheapest,
followed by piles, and then bunkers. With harvest and storage together, there were four
least cost systems: single-pass, ear-snap baling with wrapped bale storage; single-pass
chopping with silage bag storage; and two-pass baling with wrapped-bale storage. A second
group of harvest/storage systems was 25% more expensive, including single-pass,
whole-plant baling with wrapped-bale storage; two-pass chopping with silage-bag storage;
and three-pass baling with wrapped-bale storage. The three-pass chop harvest with
silage bag storage was most expensive. Our analysis suggests all harvest and farm storage
systems have tradeoffs and several systems can be economically and logistically viable.