February 1, 2010

MEMORANDUM

TO: 			Air Docket EPA-HQ-OAR-2005-0161

SUBJECT:	Foreign Agricultural Impacts Calculations for Biofuel Lifecycle
Analysis

This memorandum accompanies spreadsheets placed on the docket that
includes data about agricultural inputs in foreign countries.  These
estimates were used to project lifecycle greenhouse gas (GHG) emissions
produced by additional crop production in foreign countries.  The
spreadsheets that accompany this memorandum include estimates of:

Fertilizer, pesticide and herbicide use per hectare of foreign crop
production;

Nitrous oxide emissions per metric ton of foreign fertilizer
application;

Emissions from energy use per hectare of foreign crop production; and

Methane emissions per hectare of foreign rice production.

Upstream emissions from fertilizer production were calculated separately
in an impact calculation spreadsheet that was placed on the docket
separately.

