FUTURE YIELD AND INTEREST RETURNS. 35 
Block I, on which the area of longleaf pine land is 4,811 acres, and 
on which all of the pine down to and including 15 inches in diameter 
breasthigh, has been, or soon will have been, cut or boxed, has been 
considered separately. 
‘Table XIV gives an estimate of the present yield per acre in board 
feet of all the merchantable trees, namely, 12 to 14 inches in diameter 
breasthigh, which will be left standing after the present boxing and 
lumbering. It estimates the future yield, cutting to a limit of 12 
inches in diameter breasthigh after 20, 30, and 40 years, provided 
all trees 14 inches and under in diameter breasthigh are left stand- 
ing and continue to grow at the same rate as given in Table III in the 
first part of this report. 
TaBLeE XIV.—Future yields of longleaf pine on longleaf pine land. 
Block I: Aver- “ : 
age present Coosa County tract: Average yield per | 
yield peracre, acre, cutting to 12 inches in diameter 
cutting to 15 breasthigh, obtainable at the end of— | 
inches in di- 
ameter breast: (> = ae SE 
high. 20 years. 30 years. 40 years. 
Board feet. Board feet. Board feet. | Board feet. 
570 1, 747 2, 634 4, 066 
Blocks II, III, IV, V, and VI, containing a total of 22,994 acres of 
longleaf pine land, have been combined, and an average acre has been 
computed for the whole area. The results are shown in Table XY, 
which gives the present yield per acre in board feet, cutting to a diam- 
eter limit of 12, 14, 16, and 18 inches, and also the future yields to be 
expected 20, 30, and 40 years hence, cutting to a diameter limit of 12 
inches, if the present cutting diameter limit is 12, 14, 16, and 18 inches, 
respectively. 
These estimates are based on the assumption that all trees under 
the diameter limit given for the first cutting are left standing and 
continue to grow at the same rate as that given in Table III. 
TaBLeE XV.— Future yields of longleaf pine on longleaf pine land. 
. ad ae Coosa County tract: Average yield per 
Blocks II, ge IV, V, and acre, cutting to 12 inches in diameter 
: breasthigh, obtainable at the end of— 
Cutting lim-| Average 
it, diameter /present yield 20 years. | 30years. | 40 years. 
breasthigh. per acre. 
Inches. Board feet. | Board feet. | Board feet. | Board feet. 
12 6, 562 647 1,338 2,440 
14 6, 257 1, 334 2,170 3, 427 
16 5, 783 2, 047 3, 016 4,529 
18 ; 5,186 2,890 4,022 5, 723 
