The results of these experiments showed that the so-called fine mixtures 

 were superior to comparable coarse textured and pelleted feeds in digestible 

 protein and in total digestible nutrients. The coarse, the very coarse, and 

 the pelleted feeds were essentially equal in nutritive value. In the experiment 

 with the single ingredients the ground corn had a higher nutritive value 

 than the flaked corn but crimped oats were superior to ground oats with the 

 exception of the digestion coefficients of the protein and ether extract which 

 were essentially the same in both textures. 



Twelve cows representing the Ayrshire, Guernsey, Holstein, and Jer- 

 sey breeds were used in a three five- week period double reversal experiment 

 to determine the relative consumption of fine and coarse concentrate mix- 

 tures. The experiment showed that there was not a significant difference 

 in grain or roughage consumption or in milk or fat production between the 

 cows getting the two types of feeds. The animals which received the fine 

 textured feed, however, increased significantly more in body weight, due 

 apparently to greater digestibility of the fine grain. 



It is concluded from these experiments that such so-called "fine" feeds 

 as used in these studies are superior from a nutritive standpoint to com- 

 parable coarse feeds. Although practical experience indicates that while 

 coarse feeds are consumed more rapidly under certain conditions than fine 

 feeds, cows will normally eat adequate amounts of fine feeds if they are made 

 from high quality ingredients. The w-ork on individual ingredients indicates 

 that crimped oats may be incorporated into a dair\ feed to give coarseness 

 without imparing its nutritive value. 



Bibliography 



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Messung des Gesamtstoffwechsels und des Engergiebedarfes von Haustieren. 

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 mestic Animals.) Abderhalden's Handb. d. biolog. Arbeitmethoden. Abt. IV, 

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2. Bohstedt, G. (1931). Meeting Agriculture's Problems. Wisconsin Agr. Expt. Sla. 



Bui. 421:113-114. 



3. Colovos, N. F., H. A. Keener, and H. A. Davis. (1951). The Relative Nutritive 



Value of Ground and Coarse Textured Concentrates for Dairy Cattle. N. H. 

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 N. H. Agr. Expt. Sta. D. H. Res. Mimeo. No. 4. 



5. Colovos, N. F., H. A. Keener, J. R. Prescott, and A. E. Teeri. (1949). The Nutritive 



Value of Timothy Hay at Three Different Stages of Maturity Compared with 

 Second Cutting Clover Hay. J. Dairy Sci., 32:659-664. 



6. Darnell, A. L., and 0. C. Copeland. (1935). Ground Versus Unground Grain for 



Lactating Dairy Cows. Texas Agr. Expt. Sta. Bui. 530. 



7. Gibson, K. S., H. A. Keener, K. S. Morrow, and N. F. Colovos. (1953). The Rela- 



tive Value of Coarse and Fine Concentrates for Dairy Cows. N. H. Agr. Expt. 

 Sta. D. H. Res. Mimeo. No. 3. 



8. Olson, T. M. (1942). The Effects of Fineness of Grinding Grain on Milk Pro- 



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