130 



The num})er of races grown toiifether on the ground was 93. 

 The average yield was 3.77 lbs. (1712 grammes) per hill. In the 

 following table the three years are compared: — 



DiOSCOREA AlaTA. THE GREATER YAil, EaCES 



NOT Eequirixg Earthing rp. 



It is considered that the time has come to discard a large 

 number of the races which have been grown. It is scarcely neces- 

 sary to give any account of them, for it would serve no useful 

 purpose to do so: they are no longer of much interest. But it 

 will be nseful to record the reasons why others have been kept; 

 and this will be done next. 



Thirteen races have for the past three years of careful com- 

 petitive trials, year by year, yielded more than the average. Eleven 

 of these thirteen have been kept, the race Xo. 132 being discarded 

 as too similar to the race 76 to be required, and the race 140 as 

 too near to the race 128. The eleven retained are: — 



