APPENDIX B. 

 Effect of the Area Sample on Census Comparability 



The 1982 and 1978 Censuses were conducted 

 primarily by mail. Despite every effort to assemble a 

 complete list, a small portion of the Nation's farms were 

 not included on the census mail list. To improve the 

 coverage of the 1 978 Census, especially in counting the 

 number of small farms, the mail-out/mail-back 

 enumeration was supplemented by the direct 

 enumeration of all households in a sample of areas in 

 all States, except Alaska and Hawaii. Due to budget 

 reductions, the direct enumeration sample was 

 eliminated in the 1982 Census. 



In late 1978, enumerators visited all households in 

 approximately 6,400 segments in rural areas (areas with 

 less than 2,500 population) and completed a census 

 form for each agricultural operation. These forms were 

 then matched to the census mail list. Data from those 

 cases which were not matched to the mail list were 

 used to estimate the number and characteristics of 

 farms not on the mail list at the State, regional, and 

 national levels. No county-level estimates were 

 developed because the area sample size was 

 insufficient for reliable estimates at that level. 



The U.S., region, and State data for 1978 shown in 

 the 1978 Census of Agriculture publications included 

 data for farms represented on the mail list plus 

 estimates from the area sample for farms not on the 

 mail list. To provide comparable data for 1982 and 

 1978, estimates from the area sample have been 

 subtracted from the 1978 data. Thus, all 1978 data 

 presented in the 1 982 Census of Agriculture publications 

 include data only for farms on the 1978 mail list. 



In 1978, the area sample farms accounted for 9 

 percent of all farms in the United States, but only 1 

 percent of the total value of agricultural products sold 

 and 1 percent of the land in farms. The area sample 

 farms represented 25 percent of all farms with sales of 

 less than $2,500. The contribution of the area sample 

 farms to the total farm count varied widely by State, 

 from a low of 2.0 percent in North Dakota to a high of 

 23.8 percent in New Hampshire. 



The following table shows the 1982 results and 

 adjusted 1 978 data for farms on the maif list, as well as 

 1978 data which include estimates for farms not on the 

 mail list. 



Effect of 1978 Area Sample on Census Comparability: 1982 and 1978 



{For meaning of abbreviations and symbols, see introductory text] 



Data published in 

 1982 Census of Agriculture 



1978 

 adjusted^ 



Data publistied in 

 1 978 Census of Agriculture 



1978 

 total^ 



Portion of 



total from 1 978 



area sample^ 



Percent of 



1978 total 



represented 



by area sample 



portion 



Farms number. 



Land in farms __ acres. 



Value of land and buildings^, average per farm dollars. 



Total cropland farms. 



acres. 



Harvested cropland farms. 



acres. 



Irrigated land farms. 



acres. 

 Farms by size: 



1 to 9 acres 



10 to 49 acres _ 



50 to 69 acres _. 



70 to 99 acres 



100 to 139 acres .._ 



140 to 179 acres 



ISO to 219 acres _ 



220 to 259 acres 



260 to 499 acres __ 



500 to 999 acres- _ 



1.000 to 1.999 acres--- — - 



2.000 acres or more 



Market value of agricultural products sold $1,000. 



Crops, including nursery and greenfiouse products $1,000. 



Livestock, poultry, and tfieir products $1,000. 



Farms by value of sales: 



Less tfian $2,500 



$2,500 to $4,999 - 



$5,000 to $9,999 - 



$10,000 to $19,999 — 



$20,000 10 $39,999 - 



$40,000 to $99,999 



$100,000 10 $249,999* - - 



$250,000 to $499.999= 



$500,000 or more - 



Abnormal farms 



See footnotes at end of table. 



4 595 



1 957 501 



778 471 



3 836 

 346 113 



3 538 

 155 960 



1 544 

 145 982 



558 608 

 456 069 

 102 539 



1 454 



706 



653 



610 



469 



343 



192 



74 



87 



7 



4 310 

 988 282 

 413 948 



3 565 



333 262 



3 299 



158 639 

 1 493 



159 323 



419 251 



331 020 



88 230 



1 398 



688 



672 



565 



380 



313 



150 



59 



71 



14 



(X) 



1982 CENSUS OF AGRICULTURE 



APPENDIX B B-1 



