194 Infuence of Seed WelgJtt, etc. an the Potato Crop 



The results attained in 1921, which so closely bear out those su{i;gested 

 by the experiment of 1920, may be briefly summarised: 



1. The total yield varies directly with the wcijjht of the tuber-set. 



2. That small sets under 1 oz. in weight, although giving a great 

 return in proportion to tlieir weight, and a high proportion of heavy 

 ware, are unccononiical. 



3. That taking into consideration the total weight of seed used, the 

 proportion of heavy ware produced and the total yield, sets of 2 ozs. in 

 weight are the most remunerative. 



4. Cut sets consisting of secondary outgrowths weighing 2 ozs., and 

 whole sets with similar outgrowths of the same weight to a lesser extent, 

 produce considerably heavier crops than any other type of set, and at 

 the same time produce a high quantity of heavy ware. 



5. There is an inverse ratio between the size of the seed set and 

 the percentage of heavy ware in the resulting crop. 



6. The productivity of secondary growth, as well as 'the high pro- 

 portion of heavy ware, yielded by small tuber-sets, may be correlated 

 with immaturity of the seed tuber. 



7. There is no correlation between the presence of secondary growth 

 in the seed set and the existence of the same in the resultant crop. 



Schedule I. Showing the weights of crops in poiinrls of each seed 

 class in the experi»wntal area, including the (luard Rows. 



