custom tabulation. 
All NASS special studies, special reports, and 
custom tabulations are subject to a thorough review 
prior to release to prevent the disclosure of any 
individual respondent data. Requests for custom 
tabulations can be submitted online from the NASS 
home page ( www.nass.usda.gov) or to the NASS 
DataLab by mail or e-mail at: 
USDA 
National Agricultural Statistics Service 
Room 6061 - Mail Stop 2017 
1400 Independence Ave, S.W. 
Washington, D.C. 20250-2054 
or 
Datalab@nass.usda.gov 
ROUNDING 
For data reported to the nearest 1,000 units, the sum 
of the data may not equal the reported total due to 
rounding. 
ABBREVIATIONS AND SYMBOLS 
The following abbreviations and symbols are used 
throughout the tables: 
Represents zero. 
(D) Withheld to avoid disclosing data for 
individual operations. 
(H) Coefficient of variation is greater than or 
equal to 99.95 percent or the standard error is 
greater than or equal to 99.95 percent of 
mean. 
(L) Coefficient of variation is less than 0.05 
percent or the standard error is less than 0.05 
percent of the mean. 
(NA) Not available. 
(X) Not applicable. 
(Z) Less than half of the unit shown. 
cwt Hundredweight. 
sq ft Square feet. 
2012 Census of Agriculture Introduction IX 
USDA, National Agricultural Statistics Service 
