Fig. 7 SOIL SURFACE TEMPERATURES 



MAYBESO CUTOVER AREA (6 day means ) 



MO 



JUNE 



JULY 



AUGUST 



SEPT. 



Minima of 32° on both moss and mineral soil surfaces resiilt when air 

 minima at 3 feet drop to about 36°. Freezing temperatures occurred as 

 late as July on the tmdistiirbed surface but never dropped below 26°» 



The superiority of the m±x:ed seedbed, when canpared with the undisturbed 

 moss-covered seedbed, is shown by these facts: 



1. More seed germinated, 



2. The germination period was shorter sind earlier. 



3. Survival of the seedlings was better. 



Direct damage to seedlings because of excessive heat or freezing temperatures 

 did not occur during the period of observation. Extreme temperatures severe 

 enoiigh to cause immediate damage to seedlings appear to be of little or no 

 significance in this region. 



22 - 



