29 BULLETIN 694, U. S. DEPARTMENT OF AGRICULTURE. 
farm increases, and for all these items combined the annual cost per 
acre decreases, as the farms become larger. On the 66 farms of 60 
acres and under in area, the annual cost per farm was $127 and ‘the. 
total annual cost per acre was $2.85; on the 124 farms of 61 to 100 
acres in area, the annual cost per farm was $167 and the annual cost 
per acre was $1.99; on the 72 farms of 101 to 160 acres in area, the 
annual cost per farm was $221 and the annual cost per acre was $1.71; 
and on the 38 farms of 160 acres and over in area the annual cost 
per farm was $303 and the total annual cost per acre was $1.36. 
QUALITY OF FARM BUSINESS. 
Quality, as shown in the yield of crops and the income per animal 
unit, and especially the income per cow, exerts a great influence on 
the income derived from the farms of Lenawee County. From these 
standpoints there are marked differences in the farms surveyed. 
While the crop yields on the average are good, there are numerous 
farms on which the yields of practically all crops are much below the 
average, and other farms on which the crop yields are far above the -_ 
average. ‘There is a great variation also in income per animal unit 
and the income per cow. This makes it possible to show the con- 
trast in labor income as affected by these factors. 
CROPS AND LIVE STOCK. 
In studying the data secured from a survey of this nature it is not 
an easy matter to separate entirely the two important factors of crop 
yields and income per animal unit; hence it is necessary to present 
the two together. Table XIV shows the combined effect of crop 
yields and live stock on the 300 owner-farms, but the arrangement 
of the figures makes it possible to study the influence of each inde- 
pendently of the other. 
TaBLE XIV.—Relation of receipts per animal unit and yield of crops to labor income 
300 owner farms, Lenawee County, Mich. 
| Farms with crops yielding below the | Farms with crops yielding above the 
average for all farms studied (less than average for all farms studied (more than 
100 crop index). | 100 crop index.) 
Receipts per animal rrr a ae ore errr 
unit.a@ = 
Average mies er AVETALC neers 
Number Si number anes | Number paeraes | number | eee 
offarms.| ‘y3rm ofanimal| “come. | Cf farms.| farm. | Ofamimal)| “Come 
ce units. A 24 units. x 
| 
sei | 
Acres. | | Acres. | | 
$40 and less. .--------| 33 92 13 —$100 14 102 | 21 $192 
Ss A f Real 47 120 523 
Sto $60. 51 96 15 226 { Ga aes 21 { cn 
SGE tO SS0e-59- sues | 61 105 16 482 56 107 | 18 | 718 
ONCE SS02. 2 esse | 11 94 15 829 27 100 | 18 | Lien oy 
AT Marms.-- 6.6: 156 98 15 300 144 110 | 20 678 
a Animal unit defined on page 14. 
