115 



Effects of the cakes on quantity of milk produced. 



The total milk yield of six weeks (throughout the first and last 

 three weeks), when they were receiving soya cake, was 

 5,575 lb., or an average of 22 1-8 Ih. (equal to 2 1-7 gallons) 

 per cow daily; while the total milk yield of the same cows 

 during the middle six weeks when they were receiving decor- 

 ticated cotton cake was 5,4381b., or an average of 21 3-5 lb. 

 (equal to 2 1-11 gallons) per cow daily. So far as milk produc- 

 tion, therefore, is concerned there was a slight advantage in 

 favour of soya cake, but this is so small that it may be con- 

 sidered that the two cakes were equal in this respect. 



Effects of the cakes on the quality of milk produced. 



The milk of the cows that received soya cake contained 3*7 

 per cent, fat in the first three weeks and 4*1 per cent, fat in the 

 last three weeks. This is equal to an average of 3'9 per cent, 

 fat. The milk of the cows that received decorticated cotton 

 cake in the middle six weeks contained on the average 3'9 per 

 cent. fat. Both foods, therefore, have given the same results 

 as far as the fat content of the milk is concerned. 



Effects of the cakes on the live-weights of the cows. 

 The cows lost weight to a slight extent in the early weeks of 

 the trial, when they were giving the largest amounts of milk, 

 but they gained in weight during the last weeks. On the 

 average the cows each lost 6 1-3 lb. in weight during the first 

 three weeks, but they gained 6 5-6 lb. each during the middle 

 six weeks, and 16 1-2 lb. each during the last three weeks. 

 The net results, therefore, are that each cow gained 10 1-6 lb. 

 in live- weight during the six weeks they were receiving soya 

 cake, and 6 5-6 lb. during the six weeks they were receiving 

 decorticated cotton cake. The advantage in this respect is, 

 therefore, slightly in favour of the soya cake. 



The following analyses have been made by Mr. S. H. 

 Collins, M.Sc., Lecturer in Agricultural Chemistry: 



