14 EXPERIMENTS WITH POTATOES 



some manure was used, while the season also was favorable for 

 scab development, the results seem marked in favor of corrosive 

 sublimate. If applied to the seed of a variety that gave a 

 yield of 300 bushels per acre, even under the unfavorable 

 conditions mentioned, there would be 30 bushels more free 

 from scab than otherwise. This treatment is very generally 

 accepted as being sufficiently practical for recommendation. 



SUMMARY REMARKS. 



i. This being the first season's test, we hesitate recom- 

 mending many of the varieties. 



2. We feel little hesitancy, however, in recommending such 

 as White Star, Rural New Yorker No. 2, American Wonder, 

 Carman No. 3, Governor Rusk, and Sir William, as these have 

 been reported on favorably from so many sections. 



3. The fifteen varieties giving the heaviest yield, in order of 

 productiveness, are given in Table II. 



4. The ten varieties giving the least yield, in order, beginning 

 with the poorest, are : Early Market, Early Six Weeks, Mill's 

 Endurance, Howe's Premium, Early Fortune, Rose No. 9, 

 Champion, Irish Daisy, Houlton Rose, and Bracey's Rising Sun. 



5. The average productiveness of all varieties per acre was 

 244 bushels, the lowest being Early Market with 99 bushels, and 

 the highest, Reeve's Rose, with 453 bushels. 



6. There was very little difference in the effectiveness of 

 muriate and sulphate of potash on potatoes. One appears to 

 be about as effective as the other. 



7. Those treated with corrosive sublimate gave on an average 

 ioi per cent, less scab than those untreated; or about 25 

 bushels to the acre. 



8. After we have selected a sufficient quantity for seed pur- 

 poses, we shall be pleased to send, at the expense of the receiver, 

 a limited quantity (a few potatoes) for test purposes, provided 

 the person receiving them has had experience in potato growing, 

 and will report his results as soon as the crop is harvested. 



