10 March, 1919.] Wheat Variety and Manurial Trials. 



159 



• The order of yield in the hulk areas was approximately the same as 

 that from the experimental plots, showing that the latter are just as 

 reliable in indicating the differences of yield of wheat varieties as the 

 large areas, and that, consequently, there is no necessity to appeal to the 

 large areas to secure accurate information. 



The yields form a striking testimony to the fertility of the wheat- 

 growing areas of the Wimmera when liberally fertilized and well 

 worked. 



2. Permanent Manurial Tests at Longerenong. 



The design of the tests, of which duplicates exist at the Kesearch 

 Farm, Werribee; at the State Experimental Farm, Rutherglen; and at 

 G. C. Coutts' farm, at Warracknabeal, enables accurate information to 

 be secured of both the immediate and the ultimate effect on the yields of 

 wheat of annual applications of a number of typical fertilizers. 



The returns from each plot art partly the result of the soil itself, 

 and partly the result of the manure applied; but the inclusion in the 

 series of several plots to which no manure is applied enables the true 

 effect of each fertilizer to be readily obtained. 



It is, therefore, possible, by charging the cost of the manure applied 

 against the value of the increased crop, to draw up a balance-sheet 

 setting forth the net profit per acre resulting from the use of each 

 manure. 



The plots have now been maintained for six years, and the informa- 

 tion already secured is of interest to wheat farmers, particularly to 

 those situated on the black soils of the Wimmera. 



The plots are sown with Federation wheat at the rate of 60 lbs. to 

 the acre on well-prepared fallow. 



In the following table are given the results obtained from the vari- 

 ously-treated plots for the 1918 season, as well as the average yield 

 during the six years the plots have been in existence : — 



