PLATE 41 



A. — A field of potatoes showing the result of unfavorable cultural and soil condi- 

 tions, by which seed-piece rot destroyed 60 per cent of the stand. 



B. A field of potatoes planted with whole seed (rows to right) and cut seed (rows to. 

 left) at midseason. The hills planted with whole seed gave a 100 per cent greater yield 

 than those planted with cut seed. 



