36 



Potato Experiment (following oats). 



Seven one-fortieth acre plats were devoted to potatoes and re- 

 ceived fertilizer at the following rates per acre: 



Fertilizer Schedule 



1913 



1914 



The manure was spread and disk-harrowed May 18th. The 

 fertilizers were applied, the land fitted with an Acme harrow, and the 

 crop planted May 19th. The tubers which had previously been 

 treated for scab were dropped 18 inches apart in the row, care being 

 taken to get the same number of pieces in each row. Each plat con- 

 tained four rows 3 1-2 feet apart. A good stand of crop was obtained 

 on all of the plats, it not being necessary to replant a single hill. Dur- 

 ing the season some of the Stonemeal was applied to the tops as a 

 dust to prevent damage by bugs; the treatment was not effective. 

 The crop was sprayed eight times with Bordeaux and on two occasions 

 arsenate of lead was added to the mixture. Four cultivations and 

 two hoeings were given the crop during the summer. The plants did 

 not make a satisfactory growth on any of the plats except plat 4, 

 which was fertilized with complete fertilizer and manure. On Sep- 

 tember 10th the vines were dead on all of the plats except plat 4. 

 The crop was harvested September 21st. The potatoes were found 

 free from scab, smooth, clean, and of average size. A few large 

 tubers were noted on Plat 4. Dry matter determinations were made 

 at the time weights were recorded. The following table gives a sum- 

 mary of yields in bushels per acre, dry matter per acre, proportion 

 of merchantable potatoes in total yield, and the yield in dry matter 

 due to the several fertilizers on the basis of the no fertilizer plat at 100. 



