Fig. 7. Effect of Soil Sterilization. 



a. To left, sterilized soil planted in sweet 

 peas, to right Rhizoctonia sick soil unsterilized 

 and where seed failed to germinate. b. To 

 left, sterilized soil planted in sweet peas, to 

 right. Fusarium sick soil unsterilized, where 

 seed failed to germinate. 



