﻿6 BULLETIN 11, IT. S. DEPARTMENT OF AGRICULTURE. 



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 



25 



9,900 

 14,600 

 19, 100 



30 



35 



40 



23, 800 



45 



28, 100 



50 



32, 600 







QUALITY II. 



in 



15 

 20 

 25 

 30 

 35 

 40 

 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 



5,830 



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 

 20 

 25 

 30 

 35 

 40 

 45 

 50 



576 

 656 



827 

 1,089 



15 

 25 



3.3 



4.2 



3.1 



3.8 



340 

 630 



550 

 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 



1 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 



