page, by mail, or by e-mail to: 
DataLab 
National Agricultural Statistics Service 
Room 6436A, Stop 2054 
1400 Independence Avenue, S.W. 
Washington, D.C. 20250 - 2054 
or 
Datalab@nass.usda.gov 
ABBREVIATIONS AND SYMBOLS 
The following abbreviations and symbols are used 
throughout the tables: 
Represents zero. 
(D) Withheld to avoid disclosing data for 
individual farms. 
(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. 
(IC) Independent city. 
(NA) Not available. 
(X) Not applicable. 
(Z) Less than half of the unit shown. 
cwt Hundredweight. 
sq ft Square feet. 
X INTRODUCTION 
2012 Census of Agriculture 
USDA, National Agricultural Statistics Service 
