4 



MASS. EXPERIMENT STATION BULLETIN 334 



an amount of protein equivalent to that contained in 200 pounds each of the 

 two oil meals. The other 200 pounds necessary to make a ton of the mixture 

 was made up by adding that amount of corn starch, a material which contains 

 no protein. 



Except for the variation in the grain mixtures the rations were kept as nearly 

 identical as possible. Table 4 shows that the average daily intake of feed by 

 the two groups was practically identical. The only feed wasted was a small 

 amount of hay which has been deducted from the total in Table 4, and which 

 was practically the same for both groups. 



The composition of the feeds as set forth in Table 5 has been used together 

 with average digestion coefficients and the values in Table 4 to obtain the 

 intake of nutrients as recorded in Table 6. It will be noted that the figures 

 for both rations are substantially the same. 



Table 4. — Amounts of feed eaten 



Soybean-Cottonseed Dried Blood 



Ration Ration 



Feed 



Total Daily Total Daily 



for the Average for the Average 



Group per Cow Group per Cow 



(Pounds) (Pounds) (Pounds) (Pounds) 



Hayandrowen 14,625 11.08 14,625 11.08 



Corn silage 51,795 39.24 51,795 39.24 



Rootsi 15,024 11.38 15,024 11.38 



Dried beet pulp 2 1,650 1.25 1,650 1.25 



Grain 13,685 10.37 13,553 10.27 



'Fed from the beginning in November through February 5; a mixture of white turnips and 

 mangels. 



2 Fed from February 6 to the end of the trial. Moistened with an approximately equal amount 

 of water before feeding. 



Table 5. — Composition of the feeds 1 



Water Ash Crude Crude Nitrogen- Crude 



Material protein fiber free fat 



extract 



Hay 11.97 6.54 8.78 29.94 41.24 1.52 



Rowen 12.57 7.37 12.10 25.14 40.79 2.01 



Corn silage 75.70 1.28 2.05 6.60 13.79 .58 



Mangels 92.58 1.15 .93 .63 4.67 .04 



Turnips 93.89 .61 .65 .62 4.19 .05 



Dried beet pulp... 14.00 3 65 9.37 18.54 54.17 .28 

 Soybean-cottonseed 



mixture 12.45 6.39 18.10 6.55 51.65 4.87 



Dried blood mix- 

 ture 12.81 5.49 17.85 4.91 55.22 3.72 



Driedblood 14.15 3.13 8111 none 1.21 39 



pressed on the basis of percentages in the materials as fed, except dried beet pulp to which 

 water was added before fei dint;- 



