From the <U'.t& o"; .3d, it is concluded that: 



1. One -fourth inoh is the optimum depth for 

 sand cover on Western white oine "beds, combining: 

 (a) highest rate of germination, 

 (h) lowest relative lose from 

 gjpaping-off, and from all 



causes combined, 

 (o) highest relative survive.!, 



Undei the conditions of this test, one 

 nd of seed will produce as many plants under 1/4" 

 cover, c.c 1-1/7 pound ^r 3/8" cover, or r early 



o uncle at 1/8" in depth, 



. bsolute .prevention of dqpjtftg-off , 

 while it . 3 relatival ; c. to the 



Aftftper sown seed, would not prevent a beavy waste 

 with deep cover. She theoretical survival, had 



:en no loss from damping-off, would st^nd thus: 



( i ot s ) 4- 



(M - ( from = (Theore 



irriTal) (^tanping-off ) ( Survi\ 



.omping-c 

 (Klininatr 



1/4" - 186 - 680 



3/8" 426 176 * 602 



1/2" E84 107 = 4 



5/8" EC. 184 388 



^/4 1f - 192 = 333 



-21- 



