119 



///. Even-aged immature fully stocked stand, age 90 years. 8t. Clair county 



Based on 1 acre 



Species 



Totals 



No. of trees per acre D. B. H. 6' 



and up 



B. F. yield per acre 



Max. D. B. H., inches 



Max. height, ft 



130 

 11252 



IV. Even-aged immature fullii stocked staud. age 62 years. Knox county 



Based on 1.06 acres 



V. All-aged stand. Ozark uplattds. (Average based on 182.3 acres) 



Species 



o 



Trees per acre 



T-J TD TT /»/f 



and up ..... 17.4 28.8 8.8 11.92 2.53 2.14 1.39 1.25 2.51 76.74 

 Bd. ft. yield.. 465 603 404 316 114 100 103 37 86 2228 

 Max. D. B. H.. 

 Max. ht. ft.... 



The original stands have been altered by cutting, fires, and grazing. 

 In the southern part of the state the stands were first cut over for 

 choice yellow poplar, black walnut, and white oak. Later, other species 

 were harvested, but the tendency has been to remove the valuable species 

 from the stand, leaving the less valuable, defective, and diseased trees. 

 This in itself increased the proportion of undesirable trees. These 

 latter species then became the seed-producers of tlic forest, and the suc- 

 ceeding stands contain a higher per cent of undesirables. Along with 

 this, periodic burning in this region has kept out all but the most fire- 

 resistant reproduction. This combination of cau.ses was unfavorable 

 to restocking by the more valuable species. Recently the markets have 



