36. 



Journal of Agriculiurc. 



lo June. 191c 



evidence that the crop' 

 did not suffer, some of 

 the finest tubers were- 

 produced by tliese 

 plants. 



The sets were planted 

 on -'6th November in an 

 ordinary garden plot 

 heavily manured two 

 seasons before with 

 farm-yard manure, from 

 which a crop of greeiK 

 peas had been taken the 

 previous season. The 



plants were lifted on 

 2ist March last. Many 

 of the tubers were in a 

 very immature state, 

 showing that the rain- 

 which fell on 5th March 

 and following days had 

 exercised a marked in- 

 fluence on the growth o! 

 the crop. 



All these plants wert- 

 carefully examined on 

 4th March, when the 

 tubers were apparently 

 sound, showing that the- 

 disease attacked them 

 immediately after the 

 fall of rain ; whether the 

 disease was caused by 

 fungus or eel- worm, the 

 weather conditions would 

 be favourable to either. 

 On lifting the plants it 

 was found that the pro- 

 duce of the plants from 

 the treated sets gave- 

 clean tubers, and those 

 from the untreated were 

 all scabbv ; tho.se under 

 2 were verv 

 those under 

 but slightly 



plant No. 

 bad, and 

 No. I 

 affected. 



C. — Planting "Scabbv" 



Seed in a Clean 



Soil. 



This experiment was 

 carried out in the fol- 

 lowing manner. A- 



