Documentation
Data frequency
Tables are included on U.S. production, trade, supply and use,
stocks, and industry capacity utilization The data files include
tables with annual, quarterly, and monthly data. Quarterly
and annual data are presented on a calendar or marketing year basis
(or both), depending on the commodity. For instance, ethanol
data are usually compiled on an annual basis, but we also present
them here on a corn marketing year basis since corn serves as the
feedstock for over 95 percent of all ethanol produced in the United
States.
Conversion factors
These tables assume standard conversion factors regarding
ethanol and coproduct production, listed below. In addition,
some tables contain ratios indicating the share of various
feedstocks used for biofuels. Note these are expressed in
share of total disappearance or use. Total disappearance or
use is supply minus ending stocks.
- 1 bushel of corn yields 2.7 gallons of ethanol
- 1 bushel of corn yields 17.5 pounds of DDGS
- 1 barrel = 42 gallons.
- 1 gallon of ethanol contains the same energy as 0.66 gal. of
gasoline
- 1 gasoline-equivalent gallon of ethanol = 1.33 gal. of
ethanol
- Corn, 1 bushel = 56 pounds
- Sorghum, 1 bushel = 56 pounds
- 1 metric ton = 2,204.622 pounds
- 1 U.S. (short) ton = 2,000 pounds
Abbreviations
EIA - U.S. Department of Energy, Energy Information
Administration
ERS - USDA Economic Research Service
NASS - USDA National Agricultural Statistics Service
NEO - Nebraska Energy Office
RFA - Renewable Fuels Association
USDOE - U.S. Department of Energy
WASDE - World Agricultural Supply and Demand Estimates (USDA
World Agricultural Outlook Board)
Sources
The data for this data product comes from a wide range of
sources. The most important are:
- ERS
Feed Grains Database
- ERS Oil
Crops Yearbook Tables
- Department of Energy (DOE) Energy Information Administration
(EIA)
- Renewable Fuels Association (RFA)
- USDA Agricultural Marketing Service (AMS) Market News
- National Agriculture Statistics Services (NASS)
- Nebraska Energy Office, Nebraska Energy Statistics
- Biodiesel Magazine
- U.S. Environmental Protection Agency