18 MICROORGANISMS IN SOILS AND WATER BASINS 



The extent to which virus diseases persist in the soil is still a matter 

 for speculation. It has been demonstrated that the phage of legume 

 bacteria may persist and become responsible for a condition designated 

 as "alfalfa-sick soils" and "clover-sick soils" (178, 49o). In order to 

 overcome this condition, the breeding of resistant varieties of plants has 

 been recommended. 



