Apr. 8, 1918 Relation of Soil Fungi to Potato Diseases 



79 



Soil group C. — From the same soil as samples i and 2, on the grounds of the Jerome 

 Experiment Station. The cultures were made on June 23 , from soil in a portion of the 

 field which had not been planted to potatoes. 



Soil group D. — From the same soil as sample 4. Cultures made on August 18. 



In taking the soil samples and in making the soil cultures, the writer 

 was assisted by Mr. George L. Zundel/ each worker being present at 

 the taking of each soil sample and in making each original soil culture. 

 Mr. Zundel also gave valuable assistance in the examination and identifi- 

 cation of the fungi obtained from the cultures, each worker verifying the 

 observations of the other so far as possible. 



On account of the necessity of closing the work early in the season, very 

 little attention was given to the cultures made from samples 4 and 5, or 

 to the cultures of soil groups B and D. For the same reason, a number of 

 fungus forms which appeared in the remaining cultures were neglected, 

 and undoubtedly many fungi were lost in transfer. The fungi reported 

 in this paper therefore do not represent nearly the number of forms which 

 appeared, but merely those which there was time to properly isolate and 

 identify. In Table III is given a list of the fungi isolated and identified, 

 showing the number of times each fungus form was isolated from each 

 soil sample or group of soil cultures. 



Table III. — List 0/ fungi isolated from the soil 



' Then Scientific Assistant, United States Departtment of Agriculture; now Assistant Professor of 

 Biology, Brigham Young College, Logan, Utah. 



