1170 



EARLE V. HARDENBURG 



at the higher elevations, as indicated in table 13. Altho very little spray- 

 ing for blight was done in 1912, it was noted that the fields which were 

 sprayed returned a higher average yield than those which were not sprayed, 

 irrespective of the soil type. Apparently, depth of planting and date of 

 planting are not influenced by soil type. 



TABLE 13. RELATION OF SOIL TYPE TO YIELD ON 293 STEUBEN COUNTY FARMS IN 1912 



In the area surveyed in Monroe County, four soil series are concerned 

 Ontario, Dunkirk, Clyde, and Genesee. In all, fourteen soil types are 

 involved, but because of the small number of farms on some of these types, 

 only those shown in table 14 are used in correlating soil with yield and 

 other factors. On the basis of seed used, of value of manure and ferti- 

 lizer, and of percentage of farms using bordeaux, the Dunkirk fine sandy 

 loam and the Dunkirk fine sand are naturally the best for potatoes from 

 the standpoint of yield, among the types considered. Altho in 1913 

 nearly half of the crop in the surveyed area was grown on Ontario fine 

 sandy loam, under at least average cultural treatment, it gave the lowest 

 average yield per acre of any series studied. As indicated in the summary 

 of table 14, the soil types of the Dunkirk series seem to give higher yields 

 than those of the Ontario series. The average amount of seed, fertilizer, 

 and spraying was about the same in both series. Here, as in Steuben 

 County, depth and date of planting do not seem to be influenced by any 

 difference in soil type. The average elevation of the two soil series sum- 

 marized is almost identical. In brief, with more seed, more fertilizer, 

 and a higher percentage of area sprayed with bordeaux, the Ontario soils 

 yielded 20 bushels per acre less than did the Dunkirk soils. 



