226 



JotinidJ of Arjricidtiiic, Victoriit. [10 April, 1918. 



At Longerenoug there has been a steady increase, both in yields and 

 in the net profit per acre, as the dressings increase; 2 cwt. being the 

 maximum amount applied. 



As compared with the no manure plot, ^ cwt. superphosphate gave 

 an extra return of 21s. lOM. after the cost of the manure had been de- 

 ducted. Calculating on the same basis, 1 cwt. yielded a net profit of 

 23s. 4^d., the maximum being 25s. 2d. per acre with 2 cwt. super. 



Heavy and Light Dressings of Superphosphate at Longerenong 

 — Five Years' Kesults. 



At Werribee the net profit per acre obtained by the use of 4 cwt. 

 superphosphate was 15s. jSTo increase in the wheat yield was obtained 

 by increasing the di'essings to 1 cwt., but the response to still heavier 

 dressings, namely, 1^ cwt., and 2 cwt. respectively, showed that the soil 

 would behave in a similar manner to that of the other centres. The 

 greatest net profit per acre (19s. 8d.) was obtained by using 1\ cwt, 

 super. 



Heavy and Lkjht Dressings of Superphosphate at Werribee 

 - — Five Years^ Results. 



Note. — At this centre on two of the plots wheat was grown con- 

 tinuously, one receiving no manure and the other 1 cwt. per acre. It 



