30 



BULLETIN 654, U. S. DEPARTMENT OF AGRICULTURE. 



turity before harvesting the total yield is much greater than when 

 they are clipped oil' every two or three days. 1 As an example of the 

 results to be obtained by rotation pasturing, it may be stated that 

 one. man without purchasing any feed kept on 160 acres of alfalfa 98 

 dairy cows and enough other live stock to bring the number of his 

 total animal units up to 199. Another pastured 149 mature ani- 

 mals 12 months on 90 acres. Another kept 141 animal units one 

 year on 140 acres of alfalfa, and in addition sold 60 tons of hay and 

 10,000 pounds of alfalfa seed. 



Good dairy stock adds materially to success in dairy farming. 

 The following tabulation, based upon dairy income per dairy animal 

 unit, clearly brings out this fact. 



Table XII. — Effect of quality in dairy live stock upon success in dairy farming in the 

 irrigated valleys of southern Arizona. 



Dairy income per 

 dairy animal unit. 



Average 

 dairy 



income 

 per 

 dairy 



animal 

 unit. 



Number 



of 



farms. 



Average 

 area 



Number 

 failing 



to make 

 Spcr 

 cent. 



Dairy 

 prod- 

 ucts 

 per cow. 



Averasre 

 total 



receipts. 



Average 



farm 

 income. 



Average 



labor 

 income. 



Average 

 price of 

 cows. 



$55 and under 



$47 

 60 

 72 

 89 



124 



36 

 50 

 45 

 32 

 29 



Acres. 

 72 

 92 

 83 

 76 

 65 



9 

 10 

 5 

 4 

 3 



$38 

 50 



58 

 72 

 110 



$2, 886 

 3,790 

 3, 855 

 3,290 

 4,802 



SI, 709 

 2, 405 

 2,818 

 2,380 

 3,249 



$357 

 826 

 1,207 

 1,041 

 1,745 



$90 

 92 



169 1 to $80 



100 



$80.1 to $100 



Over $100 a 



103 

 105 







a Some of the farmers in this group retailed their milk. 



The table shows a stead) 7 increase in profits accompanying the 

 increase in dairy income per dairy animal unit. The dairy income 

 per dairy animal unit includes the value of all calves and the in- 

 creases in value of all dairy live stock, as well as the value of dairy 

 products sold. The value of the dairy products sold per cow in- 

 creases with the income per dairy animal unit. The value of the 

 cows also increases as the amount received for their products in- 

 creases, showing that the dairymen in Arizona appreciate quality 

 in their dairy animals. It should perhaps be mentioned that in the 

 last group of farms in Table XII a higher efficiency in marketing has 

 added its influence to good quality in the cows, since all the retail 

 dairy farms studied are in this group; but the first four groups of 

 farms are sufficient to bring out forcibly the effect of good quality in 

 dairy stock upon profits in dairy farming. 



Several of the leading dairy breeds are found in southern Arizona, 

 but the Holstein breed leads all others in numbers and is represented 

 by several prosperous breeders of pure blood stock. None of these 

 is included in the farms studied, because such farms are regarded as 



' Lyman J. Briggs and H. I,. Shantz. The eiTeet of Frequent Cutting on the Water Requirements of 

 Alfalfa and its Hearing on Pasturage. Bull. No. 228, TJ. S. Department of Agriculture. 



