84 ELEMENTARY TREATISE ON STOCK FEEDS AND FEEDING 



From the foregoing analyses of wheat and its by-products it 

 is apparent that the by-products used for stock feed are higher 

 in nitrogenous substances than the high-grade flour used for 

 human consumption. The carbohydrates are higher in the flours 

 than in the coarser products. 



Rice By-Products. — The rice crop of the United States for 

 1908 was estimated as 21,889,620 bushels.^ A bushel of rough 

 rice weighs 45 pounds. A barrel of rough rice of 162 pounds 

 contains approximately the following products:^ 



91.32 lbs. head or clean rice (unbroken grains), No. i grade 



15.30 lbs. broken rice, No. 2 grade 



6.28 lbs. brewers' rice, very broken (grits) 



20.00 lbs. bran 



8.00 lbs. polish 



21.10 lbs. hulls 



162.00 lbs. Total 



Rice hulls, rice bran, rice meal, rice grits and rice polish are 

 the by-products obtained in the milling of rice. i. Rice hulls 

 are the outer protecting parts or hulls of the rice kernel. They 

 are sometimes injurious when fed in large quantities, on account 

 of their silicious or sandy structure. 2. Rice bran. This ma- 

 terial comprises the outer layer of the rice kernel together with 

 some of the ger;n. Most of the rice brans contain some rice 

 hulls. The rice hulls cannot always be entirely eliminated in 

 manufacturing but there will not be enough in this product to 

 be injurious provided the hulls are not added. 3. Rice meal. 

 This material is usually sold under the name of rice bran and 

 is similar to rice bran except that it is practically free from 

 hull's. 4. Rice grits or brewers' rice. This product is made up 

 of the small hard particles which break ofif from the kernel in 

 obtaining the rice polish or in handling rice. Grits are used 

 by the brewers in making beer. Being small and hard they are 

 apt to be of little feeding value unless ground. The brewers' 

 are glad to pay a higher price than the feeder can afford for 

 this article. 5. Rice polish. This consists of the flour, or white 



1 1908 Yearbook, U. S. Dept. of Agriculture. 

 ' Bui. 77, 1,ouisiana Exp. Station. 



