is 
BULLETIN 35, PUERTO RICO EXPERIMENT STATION 
and S.C. 12/4 were slightly inferior to Mayaguez 28. The contrast 
between Mayaguez 28 and P.O.J. 2725 ifl rather marked; in 6 of 8 
plats the Bugar in cane of Mayaguez 28 was superior by a margin oi 
1 to '2 percent. The eighth plat of each variety lay at the extreme 
right of the field where drainage 
u as not good, a fact that explains 
the drop in sii<t<>><- content. In 
ratio of tons of cane per ton of 
Bugar, P.O.J. 2878 equaled B.H. 
l()( 12). Jtwas necessary to grind 
8.42 tons of P.O. J. 2725 cane* 
produce a ton of sugar, a ton 
more than was required with 
P.O.J. 2878. With an aven 
of 85.8 percent the purity of 
Mayaguez 28 somewhat ex- 
ceeded the purity of both B.H. 
10(12) and P.O.J. 2878. This 
offset the slight advantage in 
cane production of the latter 
variety. 
Trashing. — Of the Mayaguez 
canes, nos. 3 and 28 trashed the 
easiest, both comparing well in 
this respect with P.O.J. 2878. 
This observation was confirmed by examination of the sprouted roots 
and clinging leaf pieces on the joints of 100 pieces of cane per variety. 
Less than half as many leaf pieces clung to the canes of Mayaguez 
3 as to those of P.O.J. 2878, as shown in table 13. 
■3 * * <* ^ 
^ * ^ * ■ * 
Kn.i re 3.— P.O.J. 2878 at Coloso exceeded in sugar 
production all varieties excepting B.H. 10(12) and 
Mayaguez 28. The Striped columns represent aver- 
tona of sugar per acre for Mayaguez seedlings on 
eight Hio-acre plate; and the black columns the 
productions of the other varieties. 
Table 13. — Comparative differences in prolificacy and quality of canes of 
month gran-cultura sugarcane variety test at Coloso, April 19SS 1 
Canes 
Hollow cane 
pieces (per 
1,000 ob- 
served) 
Clinging 
leaf 
pieces 
per 100 
har- 
vested 
cane 
pieces 
Joints 
with 
sprouted 
roots per 
100 har- 
vested 
cane 
pieces 
Inter- 
nodes 
exam- 
ined In- 
ordi- 
nary 
method 
Pro- 
por- 
tion 
with 
borer 
holes 2 
Inter- 
nodes 
exam- 
ined by 
Aguirre 
method 
Pro- 
por- 
tion 
with 
borer 
holes 3 
A ver- 
age 
pro- 
por- 
tion 
Variety 
Per 
stool 
(aver- 
age of 8) 
With 
dry top 
rot (per 
2,000 
pieces 
Total 
Aver- 
age 
I>er 
plat 
of in- 
ter- 
nodes 
with 
borer 
holes 
P.O.J. 2878 
Mayaguez 28 
H.U. 10(12) 
Mayaguez 49. . . 
P o.J. 272.5 
Mayaguez 3. 
Mayaguez 12 . 
Nu tnber 
15.0 
14.9 
11.7 
12.0 
12.2 
12.0 
9.1 
9.2 
13.0 
11.5 
7.3 
9.6 
Number 
93 
82 
56 
90 
97 
103 
47 
Xu ra- 
ter 
72 
29 

22 
68 
17 
Xu m - 
btr 
36.0 
14.5 
0.0 
11.0 
34. () 
12.5 
8.5 
Number 
52 
58 
37 
97 
83 
21 
141 
Number 
112 
120 
230 
75 
132 
82 
114 
Number 
1,538 
704 
699 
838 
i, bm 
170 
734 
646 
500 
1,126 
521 
500 
Per- 
Ct lit 
11.7 
19.6 
13.7 
10.6 
20 2 
18.3 
17.2 
14. 2 
12.8 
11.9 
14.0 
12.8 
Number 
1,828 
1,808 
1,778 
1,781 
2. IS 2 
1,338 
1,806 
2.017 
1,809 
1,263 
1,610 
1,809 
Per- 
cent 
10.1 
13.0 
10.8 
9.5 
18.3 
13.9 
9.8 
12.2 
7.3 
11.4 
12.5 
7.3 
Per- 
cent 
10.9 
16.3 
12.3 
10.1 
19.3 
16. 1 
13.5 
13.2 
Mayaguez 7 
8 C. 12/4 
PR. 801 
105 
104 
21 
10 
10.5 
5.0 
10. 1 
80 
98 
11.7 
13.3 
P.O.J. 2714 
239 
119.5 
15 
143 
10.1 
1 Herininio Aoosta, of the Insular Department of Agriculture, assisted in gathering these data and in 
supervising the harvest. 
• I fader the ordinary method all infested and healthy internodes were counted in canes, in a 40-foot row, 
taken in feci of each of 1 different plats per variety 
s Under the Aguirre method all the internodes of Uf) canes of each variety were counted. 25 canes being 
taken from each of 1 dillerent plats. 
