References
- Bergmeyer , H. U. 1965 . Methods of enzymatic analysis , Wenheim : Verlag Chemie .
- Du Plessis , J. J. and De Wet , P. J. 1981 . Nitrogen utilization by sheep: 1. Nitrogen utilization by weaned lambs of a wool-mutton and mutton-wool breed for wool and body protein formation . Agroanimalia , 12 : 21 – 27 .
- Engels , E. A.N. 1966 . The use of an in vitro technique to predict the digestibility of roughages , M.Sc. Agric. thesis University of Stellenbosch . Stellenbosch 7600, South Africa. (In Afrikaans)
- Everts , H. 1990 . Feeding strategy during pregnancy for ewes with a large litter size. 2. Effect on blood parameters and energy status . Neth. J. Agric. Sci. , 38 : 541 – 554 .
- Foot , J. Z. , Cummings , L. J. , Spiker , S. A. and Flinn , P. C. 1984 . “ Concentrations of β-Hydroxybutyrate in plasma of ewes in late pregnancy and early lactation, and survival and growth of lambs ” . In Reproduction in sheep , Edited by: Lindsay , D. R.A. and Pearce , D. T. 983 – 985 . Canberra : Australian Academy of Science in conjunction with the Australian Wool Corporation . 1984
- NRC . 1985 . Nutrient Requirements of Sheep, , sixth edn , Washington, DC : National Academy Press .
- Russel , A. J.F. 1984 . Means of assessing the adequacy of nutrition of pregnant ewes . Livest. Prod. Sci. , 11 : 429 – 436 .
- Russel , A. J.F. , Maxwell , T. J. , Sibbald , A. R. and McDonald , D. 1977 . Relationships between energy intake, nutritional state and lamb birth-weight of Greyface ewes . J. Agric. Sci., Camb. , 89 : 667 – 673 .
- Tilley , J. M.A. and Terry , R. A. 1963 . A two-stage technique for the in vitro digestion of forage crops . J. Brit. Grassl. Soc , 18 : 101 – 104 .