554 Experiments on the Potato-Crop. 



obtained over and above the increased weight of the set in the 

 planting of large in the lieu of small sets. 



Several separate series of experiments may be cited in evi- 

 dence of the influence of the weight of the set on the produce of 

 the crop. An average of from ten to thirteen experiments with 

 different varieties, planted one foot apart in the rows, gave the 

 following results : — 



Gross Returns per Acre. 



After deducting the weight of the sets, the net balances of 

 produce per acre will stand as follows : — 



The following are the amounts of net profit per acre for each 

 oz. in the increase in the weight of the sets, from 1 oz. up to 

 8 ozs. (each oz. in the weight of the set occupying 2 square feet, 

 being equivalent to 12 cwts. 11^ lbs. per acre) of seed : — 



tons. cwts. qrs. lbs. 



From 1 to 2 ozs 1 13 2 7i 



„ 2 to 4 ozs,, for each extra oz 18 3 14 



„ 4 to 6 ozs. „ 1 12 21 



„ 6 to 8 ozs. „ 18 3 14 



The average of a number of experiments with different varie- 

 ties planted i) inches apart in the rows, gave very similar results 

 as follows : — 



Gross Returns per Acre. 



Average of 11 varieties, 1 oz. sets 

 „ 12 „ 2 oz. sets 



„ 6 „ 4 oz. sets 



After deducting the weight of the sets, the net balances of 

 produce per acre stand thus : — 



tons. cwts. qrs. lbs. ozs. 



Average of 11 varieties, 1 OZ. sets .. 9 16 or 13-21 per set. 

 12 „ 2 oz. sets .. 13 10 21 or 16-45 „ 

 G „ 4oz. sets .. 14 13 4 or 17-99 „ 



The average produce of a number of varieties planted at 



