/I/ Klloceulories. These values represent the approximate amount of food energy actually avail- 

 able to and capable of use by the animal from the food absorbed. If P, C, and F represent pro- 

 tein, carbohydrate and fat, ingested P,C,F - fecal P,C,F » virtually absorbed P,C,F. Grams of 

 virtually absorbed PxU + Cxh + Fx9 » metabollzable Calories. These values are approximate 

 only. The value for protein (=xl*) allows for a 50^ loss of virtually absorbed Calories in the 

 urine (urea, hippuric acid, etc.). In animal husbandry^ and in this table, metabollzable Cal- 

 ories are calculated from "T. D. N." ("total digestible nutrients") by multiplying grams T.D.N. 

 by U. /2/ Air-dried (90^ dry weight). /V Digestible. /U/ 0.0006 mg (J-carotene » one I. U. 

 /V A generic term Including cyonocobalamin and its hydrogenation product {known variously as 

 Bi2a *^ ^12bJ which has approximately the same biological activity. /6/ 0.025 Mg calciferol - 

 one I. U. /?/ A generic term for alpha-, beta-, delta-, and gamna- tocopherols. May help pre- 

 vent muscular dystrophy In lambs and may be needed for normal reproduction. /8/ Folic acid is 

 Qot a chemical entity, but a generic term for pteroylglutamlc acid (folacin), vitamin M, vita- 

 min Be, factor U, L. easel factor, Norlte eluate factor. /9/ The antl-hemorrhaglc factor. A 

 generic term for vitamin Ki (2-methyl-5-phytyl-l,U-naphthoquinone) , synthetic vitamin K (mena- 

 dione - 2-methyl-l,U-naphtnoqulnone), and vitamin K 2 (2-methyl-:^-dlfarneayl-l,l*-naphthoquinoDeX 

 /lO/ The term is used here as a generic term for nicotinic acid (niacin) and nicotinic acid 

 amide ( nicotinamide); also for pellagra preventive (P. P.) factor, antl-blacktongue factor, 

 /ll/ Synthesized by rumlnal bacteria, but young lambs may need supplements in diet. /12/ Based 

 on 1 lb/150 lb body weight/month. /li>/ Based on about 0.1 mg/adult sheep/day. /l**/ Baaed on 

 10 mg copper/adult sheep/day. /iV Recommended during gestation period in form of iodized salt 

 in the goiter belt. 



70 



