6 
BULLETIN 3 4, POKTO RICO EXPERIMENT STATION 
which gave the highest and the 25 which gave the lowest total pro- 
duction. Each group thus consisted of slightly more than one- 
quarter of the palms in the experimental plats. The yields of the 
two groups were 15,991 and 7,318 nuts, respectively. One group 
yielded more than twice as many nuts as did the other. In other 
words, the average palm in one group was worth two palms in the 
Nuts 
teo 
iw 
12.0 
100 
1920 
1921 
I9ZZ 
1923 
/92+ 
J925 
1926 
1927 
Figure 2. — Individual annual production 1920-1927 San Jos€ plantation, of the 
10 most productive and of the 10 least productive palms. The chain shows the 
average production for the field 
other. Their annual productions for the period 1920-1927 are 
contrasted in Figure 3. The superiority of the one group over the 
other was constant rather than intermittent and was particularly 
pronounced in the early years of production. As in the smaller 
groups already considered, the early maturity of the palms which 
later proved to be high yielders was a notable characteristic. In 
