Do grass stands need to be fertilized for biofuel production?
No. Mixed grass stands cut once a year with regrowth left in the field to provide soil organic matter as well as wildlife cover should persist indefinitely. A shift in species composition or an increase in weed population is not of great consequence; all have similar BTU/lb. Of course, higher yields will be obtained with some form of nitrogen fertilizer application. Animal manures or other such land-applied waste products are well suited for this purpose.
