36 



Levi Otto Gratz 



bottom of the soil. The calculated amount of water necessary to produce 

 the desired moisture content of the soil was added through this tube. 

 The maximum retentive power and the actual moisture of the soil were 

 determined previous to the placing of the soil in the jars. 



Per cent of 

 damping-off 



20 40 



60 



80 



100 120 140 160 180 200 220 240 260 280 300 

 Hours after transplanting 



Figure 6. influence of different soil temperatures and soil moistures on 

 rate of damping-off of cabbage seedlings caused by corticium vagum 



(TABLE 9, TRIAL Vl) 



Soil moistures are given as percentages 



