Smuts, D.B.Marais, J.S.C.Du Toit, P.J.2016-07-132016-07-1320161938Smuts, DB & Marais, JSC 1938,’The endogenous nitrogen metabolism of sheep with special reference to the maintenance requirement of protein’, Onderstepoort Journal of Veterinary Science and Animal Industry, vol. 11, no. 1, pp. 131-1390330-2465http://hdl.handle.net/2263/55808The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.Includes bibliographical referencesBy means of a nitrogen free diet the time period for the attainment of the endogenous nitrogen level has been established in sheep. It appears that the preliminary protein period is a determining factor in the length of the nitrogen free period. Sheep on a 14 per cent. protein were reduced to endogenous level in 14 to 15 days, while sheep kept on an 8 per cent. protein attain the endogenous level from the sixth to the eighth day of nitrogen-free feeding. The partition of the urinary end products on a nitrogen free ration is discussed and special consideration is given to the maintenance requirement of sheep. It has been shown in this study, that the maintenance requirement of protein of a 100 lb. sheep is less than advocated in the usual standards.9 pages : tables, graphsen©1938 ARC - Onderstepoort and Faculty of Veterinary Science. University of Pretoria (original). ©2016 University of Pretoria. Dept. of Library Services (digital).Nitrogen free dietSheep -- NutritionProtein requirementsVeterinary medicine -- South AfricaArticle