By all means, let's look at industrial hemp:
Hemp (Cannabis sativa) 305 kg oil per hectare
Now lets look at soy:
Soybean (Glycine max) 375 kg oil per hectare
Or rapeseed (canola):
Rapeseed (Brassica napus) 1000 kg oil per hectare
Or the avacoda
Avacado (Persea americana) 2217 kg oil per hectare
The lesson here is that just because the government has been unjustly and unconstitutionally suppressing a particular crop does not mean it's a cure all wonder weed.
Guacamoleum anyone?
The feasability of biofuels depends extremely heavily upon the crops from which they are derived. Ethanol from corn is barely feasable. Ethanol from sugarcane is a lot more productive. BioDiesel from soy is also barely feasable. BioDiesel from Rapeseed in imminently do-able (not that you see anything about it in any study by Pimental or Patzek - they prefer to only study expensive to grow, harvest, and press crops from borderline farmland). And BioDiesel from algae grown in wastewater ponds in the middle of the infertile desert wasteland is a damn good idea. Hemp, despite it's legal troubles and value in the fiber market, just doesn't compare as an energy crop.
Well, yes and no. Ethanol, without by-products, from corn is barely feasible. The value of the gluten or DDG's (as well as the existence of cash and futures markets in corn) make corn ethanol quite feasible.
THANKS FOR THE RESPONSE. TIMELY.
Don't forget butanol.