6 
chiefly on old fields, and is a conservative indication of the possible 
yields from properly managed stands. 
Table 2. — Rate of growth and yield of -pure, even-aged, fully stocked, unmanaged stands 
of loblolly pine in Somerset and Worcester Counties, Md. 
QUALITY I. 
Trees per acre. 
Aver- 
age 
height 
of pre- 
domi- 
nant 1 
trees. 
Average diame- 
ter breasthigh. 
Yield per acre. 
Age. 
Domi- 
nant. 
Total. 
Domi- 
nant 
trees. 
All 
trees. 
Trees 3 
inches 
and 
over 
in di- 
ameter 
(peel- 
ed). 
Trees 3 
inches 
and 
over 
in di- 
ameter 
(with 
bark). 
Trees 5 
inches 
and 
over 
in di- 
ameter. 
Trees 7 
inches 
and 
over 
in di- 
ameter. 
Years. 
10 
No. 
1,051 
742 
540 
411 
343 
290 
253 
223 
201 
No. 
1,403 
1,071 
827 
611 
469 
387 
325 
278 
244 
Feet. 
27 
44 
55 
63 
69 
74 
78 
83 
87 
Inches. 
3.8 
5.4 
6.8 
8.1 
9.1 
10.1 
11.0 
11.9 
• 12.7 
Inches. 
3.5 
4.8 
6.0 
7.1 
8.2 
9.1 
10.0 
10.9 
11.7 
Cu.ft. 
1,020 
1,610 
2,250 
2,900 
3,570 
4,230 
4,920 
5,620 
6,350 
Cu. ft. 
1,600 
2,390 
3,200 
4,000 
4,780 
5,570 
6,380 
7,200 
8,050 
Bd. ft. 
1,200 
4,700 
8,300 
12, 100 
15,900 
19,700 
23, 800 
28,100 
32,600 
Bd. ft. 
15 
1,400 
20 
5,200 
9,900 
14,600 
19,100 
23,800 
25 
30 
35 
40 
45 
28,100 
32,600 
50 
QUALITY n. 
10. 
15. 
20. 
25. 
30. 
35. 
4li. 
45. 
50. 
1,095 
1,518 
21 
3.4 
3.2 
670 
1,070 
400 
738 
1,099 
34 
4.8 
4.3 
1,110 
1,680 
2,800 
527 
758 
44 
6.1 
5.5 
1,600 
2,320 
5,400 
381 
587 
51 
7.4 
6.5 
2,140 
3,000 
8,100 
293 
475 
57 
8.6 
7.4 
2,700 
3,690 
11.000 
241 
413 
62 
9.6 
8.1 
3,270 
4,390 
13, 800 
210 
385 
66 
10.4 
8.6 
3,840 
5,100 
16, 600 
189 
354 
70 
11.1 
9.1 
4,430 
5,&30 
19,500 
174 
344 
73 
11.7 
9.4 
5,040 
6,600 
22, 600 
3,000 
6,200 
9,400 
12,400 
15,400 
18,700 
22,600 
QUALITY III. 
10 
15 
•Jo 
25 
30 
35 
40 
4.', 
50 
576 
827 
15 
3.3 
3.1 
340 
550 
656 
1,089 
25 
4.2 
3.8 
630 
980 
1,300 
625 
1,075 
33 
5.0 
4.4 
960 
1,460 
2,800 
538 
894 
40 
5.8 
5.1 
1,360 
2,000 
4,400 
480 
751 
46 
6.4 
5.7 
1,790 
2,580 
6,000 
407 
610 
50 
7.1 
6.4 
2,280 
3,200 
7,700 
353 
517 
54 
7.7 
7.0 
2,770 
3,820 
9,400 
309 
441 
57 
8.3 
7.6 
3,290 
4,480 
11,300 
280 
381 
60 
8.8 
8.2 
3,860 
5,180 
13, 400 
200 
900 
2,100 
3,500 
5,500 
7,600 
10,200 
13,400 
i Predominant trees are considered to be those composing a group of the largest dominant trees, the basal 
area of the group being equal to one-third of the basal area of all the dominant trees. 
REPRODUCTION. 
In ability to reproduce itself loblolly is one of the best, if not the 
best, of any of the pines in the eastern United States. 
Seed Production and Dissemination. 
In comparison with other species of pine loblolly is very prolific 
in seed production. Some seed is produced every year, but the 
amount varies considerably. Heavy seed years occur at intervals of 
