10 Jan., 1917.] List of Fertilizers liegistered. 17 



LIST OF FERTILIZERS REGISTERED UNDER 

 ARTIFICIAL FERTILIZERS ACT FOR THE YEAR l!»17. 



/'. liankin Scott, Vhtmist fur A//ricultiire. 



The Artificial Fertilizers Act imposes certain obligations on tlie part 

 of the manufacturer and importer of artificial fertilizers. Amongst the 

 number, one, bearing specially on the registration of brands, is worthy 

 of mention. All manufacturers and importers who intend offering for 

 sale any fertilizer during the year must first register a brand with the 

 Director for Agriculture on or before the 1st day of November in each 

 year. Each application shall set forth the full name and place of 

 business of the applicant, the name, figure, trade mark, or sign to be 

 associated with the fertilizer to identify it, a statement of analyses 

 showing the composition of the fertilizer in respect to the ingredients 

 nitrogen, iphosphoric acid, and potash, showing the forms in which they 

 occur, and the retail pries of the fertilizer. 



The term " form " has reference to the combination of the fertilizing 

 constituent with other constituents. The form of the constituent has a 

 special bearing on its availability. For e.xample, nitrogen is obta'nable 

 in three distinct forms — each differing in their availability, viz., as 

 nitrate, ammonia, and organic (bone and animal fertilizers and blood). 

 Phosphoric acid is also obtainable in a number of distinct forms, all 

 of which differ materially in their availability. Following the usual 

 custom a schedule of unit values usually accompanies the published list 

 of fertilizers. The form of the ingredients occurring in fertilizers for 

 which unit value have been computed are given over leaf. 



These values are useful, as they afford the means of arriving at the 

 commercial value of a fertilizer. This commercial value can be found 

 by multiplying the percentage of nitrogen, phos,phoric acid, or potash 

 content, by the unit value fixed for the ingredient in the form in which 

 it is guaranteed to be present in the fertilizer. 



Take for example an ordinary superphosphate showing the following 

 analysis : — 



Per Ctrnt. Unit Value. Value per ton. 

 Phosphoric aciil. water soluble, 17-00 X ,5/6 = £4 13 fi 

 .. citrate soluble. -.50 X 4/6 = 2 :t 

 „ citrate insoluble, 0'.50 x 2/- = 10 



Value per ton . . .. £4 16 9 



It must be understood, however, that as these unit values are comnuted 

 from simple fertilizers, due allowance should be made for increased cost 

 of a ton of a compound fertilizer, made by mixing two or more of the 

 simple fertilizers, when the pr'ce charged for any one of these fertilizers 

 is comnared against the commercial value as computed through the use 

 of these unit values. Tlie commercial value as found will sen'e to illus- 

 trate the saving to be made if the buyer bought the simple fertilizers 

 and mixed them during the slack season. 



The list of registered brands for the current season are to be found 

 on pages 19, 20, 21, 22, 23 of this issue. 



