366 Swedes Eesistakt to Finger-and-Toe. [July, 



The Tables show that at Dinas, the field was thoroughly 

 and uniformly affected with the disease. At Pennarth and at 

 Dolgynfydd the intensity of attack was not nearly so great, but 

 they confirm the Dinas results very well. In every case the 

 Danish varieties proved superior. 



Table I gives in detail the results at Dinas, and clearly shows 

 the great resistance of the Danish varieties as compared with 

 the others. For instance, on the unlimed land the average in- 

 tensity of attack of all the British varieties was 8.4, whereas the 

 two Danish varieties suffered to the extent of only 4.9 and 3.7 

 respectively. 



On the limed plots the difference was even more striking. 

 Taking the last column but one there is little difference between 

 the total weights per acre, but the last column shows that the 

 Danish varieties gave a much better weight of sound roots than 

 any of the other kinds tested. 



Table II. — Summary of Results three Centres. 



Average Intensity of Attack. Maximum = 20. 





Dinas. 



Dolgynfydd. 



Pennarth. 













Sulphate 













Compound 



of 



Super- 





Limed. 



Unlimed 



Slag. 



Manure. 



Ammonia. 



phosphate. 





Average 



Average 



Average 



Average 



Average 



Average 





of 3 



of 3 



of 3 



of 3 



of 2 



o#2^ 





series. 



series. 



series. 



series. 



series. 



series. 



Lord Derby 



6- 



8-8 



1-20 



3-25 



215 



0-90 



Danish Variety 5 ... 



3* 



4-9 



0-4 



0-93 



0-84 



O50 



Magnum Bonum ... 



6- 



8-2 



1*3 



3-70 



0-95 



0-84 



Pioneer 



6- 



8-8 



i-12 



2-90 



1 -35 



1-25 



Danish Variety 25 



2- 



3-7 



0-36 



0-88 



0-27 



0-23 



Dreadnought 



6- 



7*9 



1-1 



2-70 



1-37 



0-76 



Effect ci Treatment on Clubfoot. — It will be seen from the 

 Tables that in addition to the plots of the different varieties, cross 

 plots were arranged and treated in different ways. Owing to 

 some variation in the ground, and the difference in exposure to 

 infection at Dolgynfydd and Pennarth, it is impossible to draw 

 definite conclusions from the results at these two centres, but 

 the different intensities of attack shown in the Dinas results may 

 be taken as a fair indication of the effect of lime in preventing 

 clubroot. The results are all the more striking on account of 

 the fact that the lime was only applied shortly before sowing the 

 seeds. If it had been applied in the previous year the chances 

 are that its effect would have been even more marked. 



