WHY POTATOES ARE COMING BACK 



Potatoes, which were a 



declining industry in New 

 Hampshire, have shown a de- 

 cided recovery. From loo bush- 

 els per acre in 191 9, the state 

 yield has climbed steadily up to 

 a record of 171 bushels per acre 

 in 1934. In 1934 the crop 

 amounted to 1,750,000 bushels, 

 the high point of the last twenty 

 years. The come-back is due 

 primarily to research. Fundamental to the program have been in- 

 vestigations as follows: 



Certified seed. Average increases of over 60 bushels per acre from 

 the use of certified stock were proved by experimental tests in every 

 county of the state. 



Spraying. Details of a control program for late blight including 

 mixtures, pressures and time of application have been carefully 

 worked out, and now form the basis of the commercial practices in 

 the state. 



Meanwhile fertilizer requirements have been carefully determined 

 in a series of different experiments. Methods of planting have been 

 perfected. Up-to-date plans for storage have been drawn. 



Economic studies have shown the deficient areas, and have formed 

 the basis for a comprehensive state marketing program. 



Heavy pressure behind the spray has proved an important J actor in control of late blight 



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