10 April, 1918.] 



Whtdt Mcuuiiial l^rials. 



227 



will be noted that although the annual yield has been practically doubled 

 by fallowing, the total yields of the fallowed and non-fallowed plots 

 were apparently the same. There was, however, great difHculty in keep- 

 ing the " wheat continuously " plots free from weeds. 



Siunmary. — The results form a striking testimony of the efficacy of 

 superphosphate as a manure, and they further indicate to those farmers 

 in districts similar to tlie centres under discussion, that is to say, to the 

 bulk of our wheat-growers, that heavier dressings than h cwt. per acre 

 are likely to prove profitable. On the black soils of the Wimmera, at 



Harvesting the Plots at Rutherglen. 



any rate, of which Longerenong is thoroughly representative, so definite 

 is tlie response to heavier dressings that there can be little doubt that 

 the use of at least 1 cwt. of superphosphate should prove highly profit- 

 able. The beneficial effect of the heavier dressings on the pastures 

 succeeding the wheat should not be lost sight of by farmers seeking to 

 improve the stock-carrying capacity of their holdings. 



The above figures do not hold for the Mallee, where the conditions 

 are very different. Tests during the past four years at representative- 



centres have shown 60 lbs. superphosphate, which is double the present 

 average for this district, to be the most profitable dressing for wheat. 



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