THE MACADAMIA NUT [N HAWAII 
17 
Table 7. — Variations in distribution of the crop of husked nuts throughout the 
bearing season of 12 8-year-old seedling trees of the smooth-shell type, Waipahu, 
Oahu, 1930-31 crop 
Tin No. 
uao 
1931 
Total 
yield 
July 
Ail};. 
Sept 
Oct. 
Nov. 
I tea 
Jan. 
Feb. 
Mar. 
A | >r. 
l 
3-""""""""""""" 
u>. 
17.9 
.4 
3.6 
5.3 
Lb. 
10.8 
1. 1 
17.0 
6.6 
.3 
2.2 
1.2 
.3 
2.6 
17. 1 
6.4 
6 7 
Lb. 
23.7 
8.9 
12.8 
lo. 9 
1.0 
13.5 
5.8 
2.9 
113 
14.5 
25 7 
12 9 
Lb. 
6.5 
8.3 
12. 
11.5 
5.3 
11.0 
16.0 
31. 5 
12.8 
11.5 
10. 5 
.6 
Lb. 
1.3 
5.5 
2.8 
10. 1 
7 4 
9.5 
4.3 
5.6 
4.8 
6.3 
1 I 
Lb. 
0. 7 
6.2 
2.8 
5.2 
17.8 
1.6 
5.6 
8.9 
2.7 
4 
2 
Lb. 
0. 4 
9.8 
2.8 
4 1 
6.4 
1.3 
8.3 
3.5 
1.0 
1.7 
Lb. 
1.0 
3.9 
2.0 
1. 1 
1.8 
.7 
6.3 
4 3 
.4 
Lb. 
1.3 
2.3 
1.6 
1. 1 
3. 1 
1 4 
3.8 
4.5 
Lb. 
0.9 
1.0 
Lb. 
0.6 
.7 
Lb. 
65.1 
48. 1 
57.4 
55 9 
43^ 1 
43.8 
53.5 
66.6 
36.2 
54.6 
52. 1 
47 
4 
5 
2.6 
.3 
.6 
.6 
3 1 
8.2 
22 \> 
8.. 
9 
1.3 
3.8 
.6 
.7 
10 
u 
12 
3 1 | .6 
.8 
In this group of trees there are early hearers (N'os. 1 and 12) and 
late bearers (No. 5). There are those which bear the hulk of their 
crop in 2 or 3 months (\o. II) jind others which bear nearly the year 
around (Nos. 7 and 8). The variation in bearing habits of the 
noacadamia gives a wide range of harvest possibilities which commer- 
cialized interests may use to base further plantings of selected trees 
tr conform, in turn, with local Labor and processing conditions. 
TYPES OF niSTKIBl'TlON OF KKKNKI.S INTO SPKCIFIC-OKA YITY OKADES 
Grading of many lots of macadamia nuts taken systematically 
from specific locations or individual trees has shown different and 
characteristic types of distribution. Table S shows typical examples. 
Table 8. — Characteristic types of distribution into specific-gravity grades of nuts 
fnun stalling trees 
IVreetitagr of nuts in the group haying u specific gravity of— 
1 )istrilmtion I ype ;m<l tree 
Group 1 
K0.97O) 
( tamp 2 
(0.970 
0.9K5) 
l tamp 3 
(0.985- 
1.000) 
Group 4 
(1.000- 
1.026) 
< tamp 5 
(1.025- 
1.0.50) 
Group 6 
(> 1.050) 
Smooth shell : 
Percent 
Percent 
Percent 
Percent 
Percent 
Percent 
a 
11 
58 

l 


b' 
a 
25 
18 
18 
10 
16 
c 
•23 
39 
31 

1 
6 
d 
20 
21 
18 
I 

40 
Rough shell: 
e 
16 
37 
22 
21 
3 
1 
f.. 
3 

6 
20 
20 
51 
Same tree as "a" the following year. 
In considering table 8, it is not possible to separate out and evaluate 
the various factors of type, locality, condition of tree, size of crop, 
and the like which might affect grade of kernels. The differences in 
specific-gravity distribution between crops from the same tree in 
successive years are illustrated in types a and b. In 1930-31, type 
a, the yield was heavy and practically the entire crop was in groups 
1 and 2. In 1931-32, type b, the crop was distributed fairly evenly 
through all groups, only 56 percent being grade 1 kernels (groups 1 
