10 Jan., 1919.] Fertilizers Registered for 1919. 55 



LIST OF FERTILIZERS REGISTERED UNDER THE 

 ARTIFICIAL FERTILIZERS ACT FOR THE YEAR 1919. 



P. Rankin Scott, Chemist for Agricultm^e. 



In the Artificial Fertilizers Act, a fertilizer is defined as " any sub- 

 stance containing nitrogen, phosphoric acid, or potash, manufactured, 

 produced, or prepared in any manner for the purpose of fertilizing the 

 soil or supplying nutriment to plants." 



Before a manufacturer or importer of any material containing any 

 or all of the above-mentioned can offer the same for sale in this State he 

 is bound to register a brand for each fertilizer. Manufacturers and 

 importers are obliged to submit for registration a brand for each ferti- 

 lizer they intend offering for sale on or before the 1st day of ISTovember 

 in each year. At the same time each applicant is required to give a 

 statement of the percentage composition of the fertilizer in respect of 

 its nitrogen, phosphoric acid, or potash, showing the forms in which 

 they occur, and the retail price of the fertilizer. The term " form " 

 has reference to the combination of the fertilizing constituent with other 

 constituents, the availability of the fertilizer largely depending on the 

 combination of the fertilizing element with other elements. 



ISTitrogen is obtainable this season in the form of ammonia, blood, 

 and in bonedust, &c., as bone and flesh, while phosphoric acid is to be 

 had as water soluble, citrate soluble, and citrate insoluble. Potash is 

 still unobtainable for fertilizing purposes. 



Unit Value. 



The procedure for calculating the unit values of the fertilizing 

 ingredients according to their form of combination is laid down in 

 section 27 of the Fertilizers Act. Unit values form the basis for 

 estimating the value of any fertilizer during the year the values remain 

 in force, and they provide a means of enabling a buyer to purchase at 

 the most satisfactory prices. The calculation consists simply of multi- 

 plying the percentage of each ingredient by the price per unit, and 

 adding together the products. Hereunder are shown in detail the 

 methods of calculating the value per ton of a bonedust and of a bone 

 fertilizer : — 



Bonedust. 



Per cent. 

 Nitrogen . . , . . . . . . . 3.16 



Phosphoric acid . . . . . . . . 20.20 



Mechanicul Condition. 



Fine bone . . . . . . . . . . 42.00 



Coarse bone . . . . . . . . 58.00 



The first step is to determine the relative percentages of nitrogen 

 and phosphoric acid, as fine and coarse bone, and, having done so, to 



