56 a EXPERIMENT STATION. [Jan. 



cations from the yields of oats and buckwheat grown on the 

 soil used in this experiment that the available phosphoric acid 

 has been reduced to such an extent that another year we shall 

 feel justified in making the final experiment. 



Two series of pot culture work (44 pots in each series) have 

 been completed to show the availability of phosphoric acid in 

 basic slag phosphate and the raw mineral phosphates as com- 

 pared with acid phosphate or superphosphate and other soluble 

 phosphoric acid sources. This work is supplementary to the 

 field experiment mentioned above, and is carried on in co-opera- 

 tion with the basic slag committee of the Association of Official 

 Agricultural Chemists. It is planned to continue the work 

 during the coming year. Reports will be made from time to 

 time to the association. The work will also be available for 

 publication by the experiment station if deemed advisable. 



A pot experiment begun in the greenhouse last January to 

 study the availability of the water insoluble nitrogen of some of 

 the brands of fertilizer found in the 1914 fertilizer inspection has 

 been completed. This included about 140 pots. Results and 

 conclusions will be found in Fertilizer Bulletin 4, Control 

 Series, published in December, 1915. 



3. Feed and Dairy Section. 

 Mr. Smith was assisted by Messrs. Beals and, Borden. 



(a) The Feeding Stuffs Law (Acts and Resolves for 1912, Chap- 

 ter 527). 



During the past year 1,043 samples of feeding stuffs were col- 

 lected by our inspector at 168 different places of business. 

 Over 1,100 brands have been registered and permits for sale 

 issued. 



Business conditions, owing to the European war, have been 

 such that the feeding stuff situation has been decidedly abnor- 

 mal. Cereal grains have ruled high, while the price of many of 

 the cereal by-products, owing principally to the fact that the 

 normal export outlet had been shut off, bore little relation to 

 the price obtained for whole grains. This situation has led to 

 an exceptional opportunity for the use of discretion and intelli- 

 gence in the purchase of feeding stuffs. 



