THE M V.CADAM1 \ NUT !\ B \ W MI 
19 
mining t ho extent of variation among seedling trees and the adapta- 
bility of the macadamia, to various localities in Hawaii (pis. 5 and 6). 
Certain changes were made in methods used during the progress 
of the project. Differences in facilities available at the different 
locations have likewise affected the type of data which could be 
collected. The data on the individual trees are, therefore, not the 
same for the different localities. On Oahu it has been possible to get 
monthly samples and individual tree yields. At the other locations 
the data arc le-s complete. No individual tree yields could be had 
and the samples usually consisted of but one or two taken during the 
peak of the crop. 
Tables 10 to 12 summarize the study of individual trees From Wai- 
pahu and Nut ridge on Oahu, Kona and Kohala on Hawaii. 
NUTRIDGB 
Complete records were kept of t ho monthly yield and nut quality 
on eight trees at Nutridge over a X-year period. The trees were 
planted at varying times, the average age being about 10 years. These 
trees were selected on the basis of some desirable quality such as yield 
or percentage kernel and hence do not represent a cross section of the 
orchard. 
This grove is at an altitude of 600 to 800 feet and has moderate 
rainfall. 
Table 10 shows that in all cases the season's average percentage of 
grade 1 kernels is very high, in all but three cases it is more than 00 
percent. One tree, C 8 ">4, would be rated as commercially undesir- 
able because of the large percentage of sizing culls in spite of good 
quality in other respects. The Beasonal effect is apparent in C-14-156 
where the size dropped badly in the 1935-36 harvest. 
Table 10. — Yield and nut characteristics of 8 sv>ooth-shcll-(>/pc seedling trees for 
3 years, Nutridge, Oahu 
Tree No. 
Year 
Samples 
tested 
Propor- 
tion of 
un.shelled 
nuts 
>2.10 cm 
in diam- 
eter 
Propor- 
tion of 
kernel 
Propor- 
tion of 
kernels of 
prade 1 
guality 
ratio 
Yield 
of un- 
shelled 
nuts per 
year 
Yield of 
grade 1 
kernels 
per year 
Xiimhrr 
Percent 
Percent 
Percent 
Pounds 
Pound* 
1 1933-34 
95 
30 
88 
4.05 
51 
12.6 
A-i2-73 
{ 1934-35 
9 
100 
29 
93 
3. 70 
65 
17.6 
1 1935-36 
100 
29 
92 
3.81 
69 
18. 1 
I 1933-34 
2 
98 
32 
98 
3. 07 
75 
24.5 
A 13-83 
{ 1934-35 
95 
37 
100 
2.85 
79 
27.7 
1 1035-30 
2 
80 
39 
96 
3. 24 
119 
36.8 
1 1938-34 
6 
74 
40 
92 
3. 72 
48 
12.9 
C-8-54 
\ UNM-36 
3 
48 
34 
97 
6.32 
22 
3.5 
I 1935-36 
1 
23 
3fi 
98 
12.42 
1933-34 
8 
95 
28 
97 
3. 93 
44 
11.2 
C-8-57 
\ 1934-35 
100 
26 
97 
3.96 
53 
13.4 
I 1935-36 
5 
98 
28 
97 
3. 77 
42 
IL 1 
1 1933-34 
8 
97 
29 
87 
4.07 
33 
8. 1 
O-10-89. 
\ 1934-35 
5 
99 
31 
99 
3. 28 
38 
11.6 
I 1935-36 
1 
83 
33 
93 
3. 87 
| 1933-34 
5 
99 
31 
98 
3. 30 
41 
C-14-154 
< 1934-35 
5 
92 
98 
30 
97 
3. 73 
3.83 
60 
[ 1935-36 
1 
31 
85 
96 
| 1933-34 
5 
85 
39 
3. 17 
44 
13.9 
C-14-156 
\ 1934-35 
7 
88 
35 
99 
3. 29 
37 
11.2 
( 1935-36 
6 
43 
36 
92 
7. 02 
47 
6.7 
1 1933-34 
8 
94 
32 
96 
3. 48 
46 
13.2 
C-2S-415 
{ 1934-35 
8 
96 
33 
95 
3. 32 
57 
17.2 
t 1935-36 
7 
83 
34 
98 
3.60 
65 
18.0 
