Corn Residue has economic value-$70/acre Baling another $12/bale or $45/acre. Residue in Missouri Extremely Important for Maintaining Soil Organic Matter and Reducing Erosion Corn Cobs-OK, just make sure you get something for them.
Switchgrass is a Early Successional Species Will die out in 10-15 years Other NWSG persist longer Switchgrass Has A lot of Ecotypes Developed Upland-Cave In Rock Lowland-Alamo, Kanlow
Mow, Rake, Bale When Beginning in October when dormant Can be delayed to allow more nutrients to move down to the root system
In NE Missouri in 2008 at the Plant Materials Center with 100 lbs N/acre CIR Switchgrass-4.97 tons/acre Big Bluestem-5.6 tons/acre Rumsey Indiangrass-6.6 tons/acre Kanlow and Alamo SG- 7.9 tons/acre Our Plots without any N: Switchgrass-1.94 ton/acre Indian-2.14 ton/acre Big Bluestem-1.11 ton/acre
5 tons/acre 100 lb N/acre-$80/acre Remove: P-9 lb/ton x 5 tons=45 lbs/acre K-46 lb/ton x 5 tons=230 lbs/acre* At $0.78/ lb P and K=$35+$179=$214+$80=$294/acre * this can go down if harvest is delayed until winter
$294/acre/5 tons Or $58.8/ton 1200 lb Big Round Bale=$35 Cost of Baling-$20/bale Total Cost-$55/bale Does not include transport, time, etc.
As much below ground dry matter as above Very Deep-6 ft Not going to be a problem
50 million Gallon Ethanol Plant 90 gallon/ton conversion 550,000 tons or 925,000 big Round Bales At 5 tons/acre 111,000 acres within a 40 mile radius of the ethanol plant
An Answer Maybe In Field Pelletizing or Compression to a More Compact Form
Tall Fescue Aftermath From Seed Harvest Maybe the Best Source of Biofuel Big Blustem and Indiangrass harder to establish than Switchgrass but will live longer and give similar if not greater yields Cost of fertilizer replacement is nearly $60/bale Concerns with year around storage
Corn-1/3 Ethanol, 1/3 Distillers Grain, 1/3 CO2 Cellulosic Ethanol or Pelleting-100% Fuel No animal feed
A monoculture of a grass will be essentially a desert for wildlife Cost is driven up by N fertilizer What if we had a mixed stand?
Minnesota Study Published in Science Found More Biomass and Biofuel Potential When As The Diversity Increased Use of Natives?
Use of Native Legumes for a N source Also Provide Flexibility for Livestock
At MU Bradford Research and Extension Center Low Input/High Diverse compared to a High Input/Monoculture 18 different forbs and legumes Switchgrass and Big Bluestem Cutting Height Seasonal Harvests Depending on Need