LIFE HISTORY OF SHORTLEAF PINE. 
43 
Table 18. — Yield of second-growth shortleaf pine in Arkansas. 
Based on 38 fully stocked sample plots; area, 5.8 acres. All trees 6 inches and over in diameter breast 
high were scaled. Top diameter, 5.5 inches; stump height, 1 foot; number of trees per acre, see page 17.] 
QUALITY I. 
Average 
height 
of tree. 
Average 
diameter 
6 inches 
and over. 
Total 
basal area 
(breast 
high) per 
acre. 
Yield per acre. 
Age (years). 
Saw timber. 
Total 
volume. 
Scribner 
rule. 
Doyle 
rule. 
20 
Feet. 
43 
50 
55 
60 
65 
69 
73 
76 
79 
81 
84 
86 
88 
Inches. 
7.5 
8.6 
9.6 
10.6 
11.4 
12.2 
13.0 
13.6 
14.2 
14.8 
15.3 
15.8 
16.2 
Sq. ft. 
166 
182 
195 
205 
213 
219 
225 
230 
234 
237 
240 
■ 242 
243 
Bd. ft. 
8,000 
12, 700 
17,500 
22, 400 
27, 500 
32, 500 
37,400 
42, 200 
46,850 
51,350 
55, 750 
Bd. ft. 
Cu. ft. 
2,500 
25 
4,200 
6,600 
9,700 
13, 400 
17, 600 
21,800 
25, 600 
29,000 
32, 100 
35, 000 
37,800 
40,500 
3,630 
30 
4,900 
35 
6,060 
40 
7,010 
45 
7,730 
50 
8,320 
55 
8,850 
60 
9,320 
65 
9,760 
70 
10, 160 
75 
10, 520 
80 
10, 850 
QUALITY II. 
20 
35 
41 
46 
51 
55 
58 
61 
64 
67 
69 
72 
74 
76 
6.6 
7.5 
8.3 
9.1 
9.9 
10.7 
11.3 
12.0 
12.5 
13.1 
13.6 
14.1 
14.5 
125 
139 
150 
159 
167 
173 
178 
183 
186 
189 
191 
193 
194 
4,350 
7,450 
10, 600 
13, 800 
17, 000 
20, 200 
23, 450 
26,850 
30, 600 
34, 050 
37, 500 
40, 850 
44,000 
1,740 
25 
2,700 
4,500 
6,800 
9,500 
12, 400 
15, 400 
18,200 
20, 600 
23, 000 
25, 200 
27, 400 
29,500 
2,520 
30 
3,390 
35 
4,220 
40 
4,930 
45.. 
5,520 
50 
6,050 
55 
6,520 
60 
6,980 
65 .. 
7,410 
70 : 
7,800 
75.. 
8,160 
80 
8,500 
QUALITY III. 
6.3 
7.0 
7.7 
8.4 
9.1 
9.7 
10.3 
10.8 
11.4 
11.9 
12.4 
12.9 
95 
105 
113 
120 
126 
131 
135 
138 
140 
142 
143 
143 
2,600 
4,300 
6,000 
7,900 
10, 000 
12,200 
14, 600 
17, 100 
19, 600 
22, 000 
24, 600 
27, 100 
1,200 
2,500 
3,900 
5,500 
7,200 
9,000 
10, 600 
12, 300 
13, 900 
15, 400 
16, 900 
18, 400 
1,390 
1,870 
2,360 
2,850 
3,310 
3,760 
4,210 
4,650 
5,070 
5,450 
5,810 
6,150 
