I. McDonald

Overview

Best Publications

• The estimation of protein degradability in the rumen from incubation measurements weighted according to rate of passage

  E. R. Ørskov;I. McDonald

  6582
  Citations

• A revised model for the estimation of protein degradability in the rumen

  I. McDonald

  1150
  Citations

• Rates of rumen fermentation in relation to ammonia concentration

  A. Z. Mehrez;E. R. Ørskov;I. McDonald

  609
  Citations

• Studies on reproduction in prolific ewes

  J. J. Robinson;I. McDonald;C. Fraser;R. M. J. Crofts

  258
  Citations

• Digestion of concentrates in sheep. 4. The effects of urea on digestion, nitrogen retention and growth in young lambs.

  E. R. Ørskov;C. Fraser;I. McDonald

  180
  Citations

• The effect of plane of nutrition on the carcasses of pigs and lambs when variations in fat content are excluded

  F. W. H. Elsley;I. McDonald;V. R. Fowler

  145
  Citations

• The effects of protein degradability and food intake on milk yield and composition in cows in early lactation.

  E. R. Ørskov;G. W. Reid;I. McDonald

  144
  Citations

• Effects of body fatness at lambing and diet in lactation on body tissue loss, feed intake and milk yield of ewes in early lactation

  R. T. Cowan;J. J. Robinson;I. McDonald;R. Smart

  119
  Citations

• Studies on reproduction in prolific ewes. 4. Sequential changes in the maternal body during pregnancy

  J. J. Robinson;I. McDonald;I. McHattie;K. Pennie

  95
  Citations

• The response of lactating sows and their litters to different dietary energy allowances. 1. Milk yield and composition, reproductive performance of sows and growth rate of litters

  J. F. O'Grady;F. W. H. Elsley;R. M. MacPherson;I. McDonald

  86
  Citations

• The effect of changes in the amount of energy infused as volatile fatty acids on the nitrogen retention and creatinine excretion of lambs wholly nourished by intragastric infusion.

  F. D. DeB. Hovell;E. R. Ørskov;N. A. MacLeod;I. McDonald

  85
  Citations

• Comparison by direct animal calorimetry of the net energy values of an early and a late season growth of herbage

  J. L. Corbett;J. P. Langlands;I. McDonald;J. D. Pullar

  81
  Citations

• The nutrition of the early weaned lamb:III. The effect of ad libitum intake of diets varying in protein concentration on performance and on body composition at different live weights

  E. R. Ørskov;I. McDonald;C. Fraser;Elizabeth L. Corse

  78
  Citations

• Digestion of concentrates in sheep. 2. The effect of urea or fish-meal supplementation of barley diets on the apparent digestion of protein, fat, starch and ash in the rumen, the small intestine and the large intestine, and calculation of volatile fatty acid production.

  E. R. Ørskov;C. Fraser;I. McDonald

  76
  Citations

• Nutritional studies on East African herbivores. 2. Losses of nitrogen in the faeces.

  Pamela Arman;D. Hopcraft;I. McDonald

  74
  Citations

• Estimates of the energy required for maintenance by adult sheep 1. Housed sheep

  J. P. Langlands;J. L. Corbett;I. McDonald;J. D. Pullar

  74
  Citations

• The nutrition of the early weaned lamb. IV. Effects on growth rate, food utilization and body composition of changing from a low to a high protein diet

  E. R. Ørskov;I. McDonald;D. A. Grubb;K. Pennie

  73
  Citations

• A comparison of the live-weight changes, nitrogen retention and carcass composition of pregnant and non-pregnant gilts

  F. W. H. Elsley;D. M. Anderson;I. McDonald;R. M. MacPherson

  69
  Citations

• Digestion of concentrates in sheep. 3. Effects of rumen fermentation of barley and maize diets on protein digestion.

  E. R. Ørskov;C. Fraser;I. McDonald

  66
  Citations

• Stomach function in relation to a scour syndrome in the piglet.

  F. White;G. Wenham;G. A. M. Sharman;A. S. Jones

  65
  Citations

• Studies on reproduction in prolific ewes. 6. The efficiency of energy utilization for conceptus growth.

  J. J. Robinson;I. McDonald;C. Fraser;J. G. Gordon

  29
  Citations