1891.] PUBLIC DOCUMENT — No. 33. 217 



White Seedling, Houlton Rose, Hampden Beauty, and 

 Rural New Yorker, No. 2 ; while those of which small 

 samples were received were Howe's Premium, Rough 

 Diamond, Northern Spy, Early Market, Golden Flesh and 

 Dakota Red. Retaining the same division into sections as 

 was used last 3-ear, each of the principal varieties was 

 planted in drills on four sections, except the Monroe 

 County Prize, which was planted on only three sections, 

 thus leaving one section, No. 14, for the samples, of each 

 of which half a row was planted. The chief varieties were 

 so arranged that two sections of each were on that half of 

 the plot which had been sown to rye, and two on the other 

 half; and so that one row of each was planted somewhat 

 deeper and one considerably deeper than the usual depth 

 of planting. All the varieties grew well and received the 

 proper cultivation. In spite of the considerable interval 

 between the maturity of the Triumph, the earliest, and that 

 of the Rural New Yorker, the latest, all were allowed to 

 remain in the ground until the last was matured, and were 

 dug on the 16th and 17th of September. The crop was 

 much better than that of 1889, and markedly less scabby. 

 The results need not be given in full detail, since this 

 would involve unnecessary repetition. It is sufficient to 

 say that they fully warrant, so far as they go, the following 

 statement, which must, houever, be given no more weight 

 than that due to a single experiment. 



1 . The only variety which showed no scab was the 

 Rough Diamond, which, however, has few other features 

 to recommend it, and seems interesting chiefly as a 

 curiosity. 



2. The best varieties, both in the general character of 

 the crop and in their comparative freedom from scab, were 

 the Rural New Yorker and White Seedling. 



3. The ploughing-in of winter rye produced no percep- 

 tible effect on the scabbiness of potatoes raised on that half 

 of the plot, as compared with the other half. 



4. The comparison of results from deep and shallow 

 drills does not bear out the opinion, doubtfully expressed 

 last year, that deep planting diminishes scab. Neither for 

 any single variety nor for the plot as a whole was any 



