14 GROWTH OF NATIVE TREES. 
different from those of its native forest for Kauri to grow at a rate slower 
than 1 ft. in height per year. In the table (p. 15) Kauri has the most 
rapid height-growth of all the native trees. ‘The two photos opposite show 
the height-growth of planted trees at Auckland. 
The young Kauri tree in the house-grounds of the Hon. E, Mitchelson, 
Remuera, Auckland, at seven years of age is 14 ft. high. (See photo.) 
The tiers of branches show clearly the length of the yearly shoots—2 it. 
The soil is an ordinary clay. This is between two and three times the 
growth of an average European timber-tree of the same age. 
At Mr. Mitchelson’s former residence (now a convent), Auckland, I 
saw a young Kauri which at thirty-three years of age is 12 in. diameter 
and 45 ft. high. . 
At page 138 Short-leaf pine is described as one of the trees suitable 
for introduction to the Kauri forests. It is the most widespread of all 
the pines of North America, and is being extensively studied and culti- 
vated by the Forest service. The typical tree aimed at has the same age 
as what I have taken for the Kauri tree of the future—viz., 100 years. 
But, comparing the two type trees, the American pine, put alongside 
Kauri, has—_ 
Diameter, three-quarters of Kauri. 
Height, three-quarters of Kauri. 
Cubic content Short-leaf pine, 270 board feet. 
Cubic content Kauri, 900 to 1,000 board feet. 
Mr. G. A. Green, the well-known horticulturist, describes watching 
two Kauri saplings continuously for forty years, with the result that 
at fifty years* of age they were about 50 ft. high and about 2 ft. in 
diameter, (Farmer's Advocate, 5th April, 1919.) They were growing 
on the edge of a piece of native ‘‘ bush ’’ under quite natural conditions. 
CoMPARATIVE GRowtH, EuROPEAN AND NATIVE TREES. 
Let us glance now at what is the yearly average height-growth of 
European forest-trees. For this purpose we may again take Schlich’s 
tables. Spiedel’s yield curves are given as a frontispiece to my ‘‘ Journal 
of a Forest Tour.’’ They differ just as much from Schlich’s figures, as 
one would expect considering that they are of more local application— 
south Germany. Thus, for Scotch-pine at 100 years: Schlich, 72 ft. ; 
Spiedel, 75 ft. For Spruce at 60 years: Schlich, 52 ft., Spiedel, 52 ft. 
For Silver-fir at 80 years: Schlich, 65 ft.; Spiedel, 62 ft. 
Schlich’s general-average height-growth figures for the five chief 
Kuropean forest-trees—Oak, Beech, Scotch-pine, Spruce, and Silver-fir— 
are as follows :— : 

Diameter. Height. 
At 10 years the average is sa Ea 6 ft. 
ae 20 - ee OTN, 13 ft, 
oe a) 4. <p 479i, 18 ft. 
vo a ‘ . 2° 4in. 235 ft, 
s 40 Re +» 8°@-1n, 33 ft. 
3. iO “y , 6°] in. 52 ft. 
%, 680 “a wv OD in, 67 ft. 
., 100 ” .. 1O8in. —— "78 tt. 
.. 140 4 ea: 96 ft. 
It will thus be seen that at all ages the mid-European forest-trees show 
a growth decidedly below an average of 1 ft. per year in height—in fact, 



* Double the average diameter-growth assumed at p- 73: 
