SOME FURTHER EXPERIMENTS WITH POTATOS. 



85 



uniform depth, and made good growth from start to finish. The con- 

 trast between the ' Factors 9 which outlined the plots and the ' Arran 

 Chiefs' which filled them was striking in the extreme, and made 

 much easier the task of comparing their growth during the season. 



The cultural operations were all carried out at the same time, and 

 the crop was lifted and weighed in October after the tops had died 

 down, chats being weighed separately from seed and ware. 



The result of each spacing, calculated to a square rod plot both for 

 ware and seed and chats, is shown in the following Table. The area 

 occupied by each plant, the number of plants required to plant a square 



c*. 



saWCHEs S2saJ8 5S3 3 I 



Fig 24. — Showing Rise in Average Yield of Potatos with Increase 



in Space. 



rod, and the average weight of crop from each plant of that spacing 

 are also shown in the Table. 



In making the calculations for the Table the very rare misses have 

 been allowed for, and all the yields given are averages of the triplicate 

 series. 



The plot on which the widest spacing was arranged occurred but 

 once. Eighty-one tubers of the same stock and size as the remainder 

 were planted in nine rows three feet apart, the plants being three feet 

 apart in the rows. Each plant was mounded up all round instead of 

 being earthed up in rows as the remainder were. The total yieJd was 

 447 lb. 10 oz., giving 143 lb. 8 oz. ware and seed, 23 lb. 10 oz. chats, 

 and a total of 167 lb. 2 oz. to the square rod, the average yield for 

 a plant being 5 lb. 8 J oz. 



The figures here given confirm in a marked way the conclusions 

 stated after last season's experiment, but in translating them into 



