LIFE HISTORY OF SHORTLEAF PINE. 
45 
Table 19. — Yield of shortleaf pine in North Carolina, compared with yield of Scotch 
pine in Germany. 1 
Characters compared. 
Scotch pine. 
Shortleaf pine. 
Quality 
Quality 
Quality 
III. 
Quality 
I. 
Quality 
II. 
Quality 
III. 
1,543 
590 
206 
2,536 
758 
317 
"i,"2ob" 
585 
510 
235 
90 
765 
355 
155 
1,405 
550 
270 
4.0 
7.3 
11.5 
2.8 
5.8 
9.4 
" "\'.2 
6.7 
7.9 
11.2 
15.3 
6.5 
9.4 
13.0 
5.0 
7.6 
10.6 
130 
167 
184 
104 
135 
151 
67 
108 
132 
188 
215 
227 
156 
179 
188 
125 
144 
149 
34 
68 
79 
26 
43 
63 
21 
34 
48 
51 
66 
81 
43 
57 
71 
35 
47 
60 
1,690 
4, 500 
6,570 
830 
2,700 
4,260 
400 
1,730 
2,930 
3,350 
5,850 
9,100 
2,350 
4,350 
7,150 
1,300 
2,900 
5,250 
92 
103 
53 
98 
68 
44 
49 
61 
24 
• 121 
128 
94 
93 
106 
82 
66 
82 
71 
57 
90 
82 
28 
54 
53 
14 
35 
37 
111 
117 
114 
78 
87 
90 
43 
58 
65 
Trees per acre: 
Trees 30 years old 
Trees 50 years old 
Trees 80 years old 
Diameter, breast high (inches): 
Trees 30 years old 
Trees 50 years old 
Trees 80 years old 
Basal area, breast high, total per acre (square feet): 
Trees 30 years old 
Trees 50 years old 
Trees 80 years old 
Height, average (feet): 
Trees 30 years old 
Trees 50 years old 
Trees 80 years old 
Yield, total per acre (cubic feet): 2 
Trees 30 years old 
Trees 50 years old 
Trees 80 years old 
Periodic annual increment (cubic feet): 
Trees 30 years old 
Trees 50 years old 
Trees 80 years old 
Mean annual increment (cubic feet): 
Trees 30 years old 
Trees 50 years old 
Trees 80 years old 
i Figures from Weise's yield tables for Scotch pine, Quality I and II averaged to make I; III taken as II; 
and IV and V averaged to make Quality III. 
2 Yield of Scotch pine taken for all wood down to 3 inches in diameter; of shortleaf pine taken only for 
trees up to 6 inches diameter breast high, and to 6 inches in tops. 
The superiority of shortleaf over Scotch pine in size of trees and 
total yield is striking. Scotch-pine stands contain from two to three 
times as many trees per acre as the shortleaf stands, and the trees 
have correspondingly smaller average diameters. A comparison of 
the total yield of the two species is interesting. At the age of 30 
years shortleaf shows about two or three times the yield of the Scotch 
pine for the better and poorer sites, respectively. At 50 years on 
first quality situations, the two species approach the closest in yield, 
yet the yield of shortleaf is just 30 per cent greater than that of 
Scotch pine. The shortleaf yield is again about 56 per cent greater 
at the age of 80 years. Similar yield tables for Scotch pine by Dr. 
Schwappach show usually from 15 to 20 per cent less yield than 
Weise's tables. 
YIELD IN MIXED STANDS. 
In mixed pine and hardwood stands the yield of shortleaf varies 
widely. In the lower mountains of northern Georgia recent timber 
estimates made by the Appalachian surveys show an average yield 
of 1,000 to 3,000 board feet per acre; but on the warmer slopes in 
the same region, pure virgin pine stands of mixed ages covering 
