172 



Joiinial of Agriciilhin', Vuloria. [IO-Maiuui, 1919. 



applied, as well as tlie percentage of " Take all " present, is sliown in tlie- 

 following table: — 



It would appear, tlierefore, tliat an alkaline soil is favorable to the 

 development of tlie disease, 'but it should perlia]is be again remarked,, 

 this judgment is from one year's data only. 



Xow it is a well-known fact that if wheat follows wheat continu- 

 ously, the time arrives when the yield does not equal in quantity the- 

 seed used. If, however, disease enters in as a factor, this result is 

 attained in a far shorter time, despite careful cultivation. 



Unfortunately, through a comhination of factors, this stage has been 

 reached in the experimental plots under notice, and at a period earlier 

 than one would expect. Whether the condition will continue remains 

 to he seen. 



The following table shows the system of rotation followed in the 

 green manurial plots and the percentage of disease observed in the 

 various wheat crops grown during the 1918 season: — 



Plot Xo. 



11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 



Croi) 



Wheat after rape ploughed in 



Wheat after barley ploughed in 



Wheat after peah ploughed in 



Wheat after rye and vetches ploughed 



Wheat after bare fallow 



Wheat after rape fed off 



Wheat after barley fed off 



Wheat after peas fed off 



Wheat after rye and vetches fed off 



Wheat after bare fallow 



Percentage of 



'•Take all" 



(hiring the 



1918 Season. 



\^^ 

 ()0 

 15 

 25 

 10 

 12 

 25 

 10 

 56 

 15 



In making a comparison between the plots on which the green 

 crops were ploughed in and those where the crops were fed oif, we find 

 that on the average the " fed off " plots have a slightly less percentage 

 of disease present. Further, these latter plots have yielded feed for 

 stock, while the former have required the additional work of ploughing 

 down the green crops. In other words, where the green crop was 

 ploughed in there was more lahour necessary, yet there was less grain 

 and less feed; but where the crop was fed off, less labour gave a 'better 

 result and, in addition, there was more feed for stock. 



