536 



IOWA DEPARTMENT OF AGRICULTURE 



The number of stock that this area will support may next be de- 

 termined. 



NUMBER OF COWS AND TOUNG STOCK THAT CAN BE KEPT. 



To determine how many cows and young stock can be kept on this 63 

 acres it is first necessary to determine how much land is required to keep 

 one cow and one-half as much young stock. 



FEED COXSUilED liY OXE COW AND CORRESPONDING YOUNG YEARLY. 



Based on the rations already assumed, the quantity of feed required 

 by one cow and corresponding young and the acreage required to grow 

 the same on the farm are shown in the following table: 



Table 4. — Feed and acreage required for each coio and corresponding 

 young. 



Kind of Feed Required 



Cow.o 



Year- 

 lings. b 



Calves 



Total 

 feed re- 

 quired 



Area cor- 

 respond- 

 ing to 

 total 

 feed re- 

 quired. c 



Corn sil.asp- 



Corn-and-cob ineal 



0:it.'; 



Clover hay 



Cotton-seocI meal _. 

 Pnstiirafro 



Pounds 



12,775 



1,09.5 



730 



2,. 5.55 



36.5 



Pounds 

 543.0 

 90.5 



659.5 



"'o'ss' 



Pounds 

 135.0 

 •15.0 



456.3 



"o'iii" 



Potmds 



13,4.53.0 



1,230.5 



730.0 



.S, 670.8 



A ores 



0.561 

 .293 

 .570 

 .918 



.375 



2.717 



The last column of the above table shows that the area of land required 

 to grow the crops for the maintenance of one cow and corresponding 

 young is 2.717 acres. Above it was shown that 63 acres of the farm 

 are available for cows and young stock. This area will therefore support 

 23.2 cows. 



Omitting the fraction for the sake of convenience, it may be assumed 

 that the farm will support about 23 cows and 12 head of young stock and 

 that it will produce all the grain and hay required for them except about 

 4.25 tons of cotton-seed meal or oil meal, which must be purchased at a 

 cost of about $32 per ton, or $136. 



a The amount of each feed required for a cow per year is obtained by multiply- 

 ing by 365 the average quantity of feed consumed daily. 



6 The quantity of feed required by the yearlings and calves corresponding to 

 one cow will be the quantity fed, as shown in the rations assumed, multi- 

 plied by the number of days each feed is given, and the sum divided by 4, since 

 there are only one-fourth as many yearlings and one-fourth as many calves as 

 there are cows in the herd. 



c The acreage of each crop required for one cow and corresponding young is 

 determined by dividing the amount of feed required, as shown in column 4, by the 

 yield per acre (as assumed). It is estimated, also, that 1 bushel of com will 

 produce 70 pounds of corn-and-cob meal, or 4,200 pounds per acre. 



