during periods of extraordinary reproduction, the ma- 

 jority of all young long-leaf pines. It should be re- 

 marked that, so far as known, no damage of this sort 

 has been reported from blooded hogs. 

 Big Increase in 5 Years 



In the fenced quarter-acre tracts there has occurred 

 during the five years a considerable increase in the 

 number of long-leaf seedlings. In one, for example, 

 the number has increased from 927 at the start to 

 1,707, equivalent to 84 per cent, and in the other 

 tract,' from 810 to 1,513, or an increase of 87 per cent. 

 The experiment further indicates that the grazing of 

 hogis does not prevent the seeding in of short leaf 

 and loblolly pines, for some have sprung up on both 

 the ungrazed and grazed tracts. 



The effect of yearly controlled burnings is shown 

 in a decided check in the growth of long leaf and the 

 killing out of practically all of the short leaf and 

 loblolly pines, which are not particularly resistant to 

 fires. 



On the tract burned over yearly three-tenths of one 

 per cent of the long-leaf saplings were over 2 feet in 

 height and the tallest was 2.8 feet, w r hile on the 

 protected tract 16.3 per cent were over 2 feet and 

 the tallest measured 7 feet. The effect of burning on 

 a very small tract of this size, whether controlled or 

 not, is probably considerably less severe and injurious 

 than that resulting from a fire over a large area where 

 there occurs a preliminary period of heating and 

 drying by the wave of hot air preceding the arrival 

 of the blazing fire front. Since the saplings in the 

 experiment are just beginning to "shoot" up height 



22 



