A STUDY OF FACTORS INFLUENCING THE YIELD OF POTATOES 1149 



LONG ISLAND 



Most of the potato crop in Suffolk County is grown east of Riverhead 

 on both the north and the south shores of Long Island. The Long Island 

 Railroad furnishes the transportation facilities for practically all of the 

 surplus crop of this region. Most of the roads are improved to a high 

 degree. Thus the time required for shipments to reach New York City 

 need not be over one day and no delay is necessitated by transfers to 

 other railroads. 



FlG. 127. GROWING-SEASON RAINFALL (iN INCHES) 

 IN REGIONS SURVEYED 



Nearly all of the crop in Nassau County is grown north of a line drawn 

 east and west thru the central part of the county. Most of the surplus 

 crop of this county is transported directly, in heavy wagons and motor 

 trucks, to the Wallabout and Harlem Markets in Brooklyn. 



The greater part of Long Island is of marine deposit formation, the 

 elevation ranging from a point at about sea level, in the Hampton section, 

 to an altitude of nearly 300 feet in some places on the north shore. The 

 average elevation of the potato fields surveyed was 65.5 feet. Due to 

 the low elevation of the south shore, the crop is exposed to heavy sea fogs 

 which make conditions favorable to the development of late blight. The 



