lo Jan., 1912.] Ariiflcial Maiucres Ads. 23 



The label and invoice certificate referred to above are those mentioned 

 in sections 5 and 7 of the principal Artificial Manures Act of 1904. 

 These clauses require the vendor to attach to each bag a label or tag, 

 declaring the composition of the manure sold in quantities exceeding 56 

 lbs., and to deliver to all purchasers of manures, at the time of sale, an 

 invoice certificate conveying similar information to that required to be 

 stated on the label. 



Practical Utility of Unit Value System. 



From the unit values and the guarantee contained on the tags or 

 invoice certificates, it can be readily ascertained whether the price asked for 

 a fertilizer is its reasonable commercial value (see method of calculation). 



It will be noted that the price asked for mixed manures is generally 

 higher than the commercial value which would be arrived at by means of 

 a calculation from, the unit value, but it must be remembered that in 

 fixing the unit values no allowance is made for the cost of mixing .and 

 other incidental expenses, but only the actual value of the constituents 

 which have a commercial value is taken into account. 



The unit values and methods of calculation .are shown hereunder : — 

 Unit Values of Manures for 191 2. 



[Calculated from declared f rices of Fertilizers registered at the Office of the 

 Secretary for Agriculture.) 



s. d. 



I per cent, of nitioyen in the form of nitrate ... ... ... ... 17 5 



I per cent, of nitrogen in the form of ammonia ... ... ... ... 14 9 



I per cent, of nitrogen in the form of blood ... ... ... ... 12 9 



I per cent, of nitrogen in the form of fine bone ... ... ... i^ 9 



I per cent, of nitrogen in the form of coarse bone ami unspecified ... 12 o 



I per cent, of phosphoric acid as water soluble ... ... ... 4 9 



I per cent, of phosphoric acid as citrate soluble ... ... ... 40 



I per cent, of phosphoric acid as fine bone ... ... ... ... 46. 



I per cent, of phosphoric acid ao coarse bone ... ... ... ... 40^ 



I per cent, of phosphoric acid as insoluble, in bone su[)erphosphates, and 



Thomas phosphates ... ... ... ... ... ... 3 *^ 



I per cent, of phosphoric acid as insoluble, in all other manures ... 2 o 



I per cent, of potash in the form of sulphate ... ... ■■• ••■ 5 5 



I per cent, of potash in the form of chloride ... ... ... .•■ 4 ^ 



Method of Calculating the Commercial Value of a Manure. 



The commercial value per ton of a manure sold in Victoria is obtained 

 by multiplying the percentages stated of the fertilizing substances bv the 

 corresponding unit values lixei" "lerefor, and adding the separate values 

 t<\^:lhtr. Examples : — ■ 



1. XiTKATE OF Soda — 



Invoirc (■(■rtif\<-at( or tcKj, \o '50 per ci; lit. niirof/cn. 



Colndatioii— £ "■ dA 



1O-50 X 17s. 5d. = ... ... ... 13 10 



Calculated vahie per ton = ... ... 13 10 



