1910.] Summary of Agricultural Experiments. 753 



out. Of the special cakes, a soy bean cake containing n per cent, 

 of oil was substituted for the compound cake. An additional lot of 

 black and blue-grey polled cattle were given linseed cake. The fol- 

 lowing results were obtained : — 



Average Cost per 



vvt. at Live-wt. cwt. of 



start. increase. live-wt. 



Per head. Per head. increase, 



cwt. qr. cwt. qr. lb. £ s. cf. 



Lot I. (Linseed cake) 8 3 J 2 1 21 220 



„ IV. ( „ ' ) ... ... 8 if 2 1 14 2 3 o 



II. (Soy bean cake) 8 3! 2 I 18 1 17 o 



III. (Soy bean cake — 11 per 



cent, oil) 8 3^ 219 200 



While at Pitskelly the linseed cake was the most profitable, here 

 the soy bean cake was superior to it. This is considered to be due 

 to the inferior quality of the linseed cake, which was deficient in oil, 

 and gave evidence of having been made from badly cleaned inferior 

 seed. The relative position of Lots II. and III. is in agreement with 

 the results obtained at Pitskelly. There the compound soy bean cake 

 with over 8 per cent, of oil did worse than the one containing 6 per 

 cent., and here the latter has done much better than the one contain- 

 ing 11 per cent, of oil. 



The conclusions drawn from these two experiments are : — (1) That 

 soy bean cake is a perfectly safe food when used with discretion, but 

 notwithstanding its high analysis ordinary soy bean cake at £6 155. 

 per ton seems to be a dearer feeding-stuff than good linseed cake at 

 ^9; and (2) that the poorer the soy bean cake is in oil the better are 

 the results obtained; for the soy bean cake containing 6 per cent, of oil 

 has given more profit than the cake with 8 per cent, of oil, and still 

 more than the one with 11 per cent.; and when the increased cost of 

 the richer cake is taken into consideration, the results are much in 

 favour of the soy bean cake with least oil. It would seem that the 

 quality of the oil of the soy bean is responsible for this result. 



Effect of Soy Bean Cake on Cattle (Field Expts. at Harper Adams 

 Agric. Coll. and in Staffs and Salop, Report, 1909). — Complaints were 

 made by users of this cake that loss and damage had been caused to 

 stock by its use. Consequently a trial was made at the College of 

 the cake used by a farmer who attributed to ft the death of a heifer. 

 Two rather delicate two-year-old heifers were selected for the experi- 

 ment, and supplied with as much green clover and water as they 

 would take. In addition, one received i£ lb. Bibby cake and 1 lb. 

 Soy cake. The Soy cake was increased in quantity h lb. per day 

 until 7 lb. per day was being given, which was as much as the animal 

 would clear up. At this stage the Bibby cake was stopped, and the 

 7 lb. per day of Soy cake continued until the end of the trial. The 

 other heifer received at first no Soy cake, but 3 lb. of Bibby cake, 

 which was increased by \ lb. per day up to 6\ lb. When this point 

 had been reached, a sudden and complete change was made. The 

 Bibby cake was stopped and 7 Tb. of Soy cake was given in its place. 

 No difference was noticed at all in the animal or in the consistency 

 of the dung. Both animals gained in weight during the trial. The 

 contention that Soy cake may be harmful to stock if fed in any 

 quantity, and if given suddenly, is not upheld by this trial, as purposely 



3 G 



