390 Hilda Kincaid : 



quantities of wool, therefore, had to be used in the estimations. 

 Mean of experiments gave the percentage to be .0220. It is 

 only the large amount of wool exported which makes the phos- 

 phoric acid lost in this way at all appreciable. For the year 

 1908-9 (23) the production of wool is given as 87,536,450 lbs., 

 almost the whole of this being exported. 



This gives the phosphoric acid lost in this way as 19,258 lbs., 

 or about 8^ tons. 



From the cultivated land the chief loss is by wheat. In year 

 1908-9 (23) the total wheat production in Victoria was 

 23,000,000 bushels, about 2,000,000 bushels of which were re- 

 turned to the land as seed, 21,000,000 bushels being thus lost 

 to the cultivated land, and of those about 15,000,000 exported. 

 The average percentage of phosphoric acid is about .5, in Aus- 

 tralian Avheat. Tte amount of pliosphoric acid therefore lost to 

 the cultivated land = 2929 tons and lost entirely to the State 

 = 2097 tons. 



Siimniarisino- these results: — 



B. — Lost from Cultivated Laud. 



Lost fi-oni State. 



1. By Wheat - - 2929 tons - 2097 tons 



When we remember this is in terms of pure pliosphoric acid 

 and not in terms of commercial manures (Avhich usually only 

 contain from 20-24 per cent, of H.^PO,), and also in this list 

 no account is taken of condensed milk, bacon, ham, cheese, etc., 

 we cannot but realise the necessity for fertilising the land to 

 make up for this continuotis drainage. That this is made up 

 to a verv large extent on cultivated land is admitted, but the 

 Hl)ove figures show that the grass lands are submitted to a 

 heavy leakage, and this has been going on. uninterrupted, more 



