16 
BULLETIN" 3 4, POETO RICO EXPERIMENT STATION 
show an area of high production in the northwest corner of the field 
comprising section A of plats Nos. 4 and 5 and sections A and B 
of plats Nos. 6 and 7. The production for the two periods combined 
is shown diagrammatically in Figure 9 and is given in Table 4. 
Table 4. — Average number of nuts produced per palm per subdivided plat in 16 
harvests, July, 1913, to June, 1917, at Boquillas plantation 
Nuts in- 
Plat No. 
sertion 
A 
Section 
B 
Section 
C 
7 . _ __ 
Number 
111 
205 
230 
175 
Number 
150 
147 
117 
125 
Number 
109 
126 
115 
103 
6 
5 
4 
Plat No. 
3 
2 
1 
Nuts in — 
Section 
A 
Number 
128 
102 
144 
Section 
B 
Number 
104 
91 
94 
Section 
O 
Number 
119 
125 
138 
The record cover- 
ing the periods dur- 
ing which the effect 
of the fertilizers 
should have been 
most pronounced, 
that is, from a year 
after the first to a 
year after the final 
application of ferti- 
1 i z e r s, principally 
shows decided ine- 
qualities in the field 
that are unrelated 
to fertilization. Sec- 
tion A of plat No. 5 
produced per palm 
approximately 
as much as sections 
B and C of the same 
plat combined, 
namely, a production 
ratio of 2 to 1, 
although all received 
equal applications of 
complete fertilizer. 
Sections A and B of 
the check plat, No. 4, 
in combined yield 
produced more than 
any two combina- 
tions of fertilized B and C sections. Such inequalities in the field 
veiled any fertilizer effects which may have been present. 
As has already been explained, the record for the fifth period, 
during which four plats received salt, was less satisfactory than the 
earlier record. If the inequalities both within and between plats are 
Plot No.Z Plat No. 3 Plat NoM Plat No. S Plat N 0.6 Plat No. 7 
Figure 8. — Average yield per period of the different plats, 
in nuts per palm during five periods of eight harvests 
each, 1913 to 1924, Boquillas plantation 
