26 
BULLETIN 35, ITKRTO RICO EXPERIMENT STATION 
_'^7^. the sugar productions were even more contrasting, 8.25 tons 
per acre for B.H. 10(12) and 6.97 tons for P.O.J. 2878. 
In the first ratoons of the above plantings, P.O.. J. 2878 outyielded 
B.H. 10(12) by a margiD of 6.4 tons of cane per acre. The crop was 
not irrigated and was cut in June 1932, when it was ls : . months old. 
The results are shown in table 18. 
Table 18. — /{(suits of Jirst-ratoon tugareane variety tests on unirrigated silt lt><im 
at Central Pagan, Hacienda Trinidad [field no. Ql)\ 19 
Variety and plat 
Acre viel'l 
Normal juice ana. 
Available 
of cane 
Brix 
Booroae 
Purity 
96° sugar 
per acre 
B.H. 10(12); plat 1 
Tons 
35.20 
37.20 
36.00 
44.00 
34.40 
34.00 
32.00 
47.20 
34.20 
40.60 
Percent 
Percent 
Tons 
4 020 
I"! 2878; plat 2 
B.H. 10(12); plat 3 
4 112 
P.o.J. 2878; plat 4. 
4 641 
B.H. 10(12); platfi.. 
P.o.J. 2878; plat 6 
H.ll 10(12); Mat 7 
3.655 
I'. o.J. 2878; plat 8 
B.H. 10(12) (average of plats l, 3, 5, 7)' . 
[7.8 
17.5 
14.0 
3.929 
P.O.J. 2878 (avenge 0( plats 2, 4, 6, 8)' 
1 Averages of four H-acre plats cut in June when 18>4 months old. 
Productions were very variable, however, and the odds low. only 
13 to 1, indicating no significant differences between the two varieties 
in ratoons. Such advantage as P.O.J. 2878 had in cane tonnage was 
almost entirely offset by the higher percentage purity of B.H. 10(12), 
so that differences in sugar production were slight. Rainfall was very 
heavy during the 2 months preceding harvest (table 3). Apparently, 
with heavy rainfall and on friable, alluvial soil subject to overflow, 
B.H. 10(12) ripens better than does P.O.J. 2878. The total sugar 
production per acre for the gran cultura and first ratoons was 12.179 
tons for B.H. 10(12) and 11.253 tons for P.O.J. 2878. Soils of this 
tvpe should be avoided when cropping P.O.J. 2878 in the Anasco 
Valley. 
Central Pagan gran-cultura variety trial at Hacienda Altagracia, 
1932. — In the Hacienda Altagracia variety trial on silty clay loam not 
subject to overflow, P.O.J. 2878 exceeded the cane production of 
B.H. 10(12) by the definite margin of 6 to 7 tons per acre in three plats. 
The results are shown in table 19. 
Table 19. — Results of gran-cultura sugarcane variety tests on silty clay loam at 
Central Pagan (field Dolores A-&6), 1932 ' 
Variety and plat 
Acre yield 
of cane 
Normal juice 
anal. 
Available 
96° sugar 
Sucrose 
Purity 
B.H 10(12); plat 1 
Tons 
58.4 
64.0 
55.2 
58.8 
53.6 
P, ret nt 
Pi ret nt 
Tons 
P.O.J. 2878; plat 2... 
nil. 10(12); plat 3 
P.OJ. 2878; plat 4 
B.H. 10(12); plat 5 
P.OJ. 2R78; plat « 
60.0 
B.H. 10! 12)'; plat 7 
56.0 
62. 
61.2±1.8 
55.8±1.4 
P.o.J. 2878; plat B 
P.O.J. 2878 (average of plats 2, 4, 6, 8)» 
13.5 
13.7 
SO. 5 
83.4 
6. 272 
B.H. lot 12) (average of plats i. 3, 5, 7) s 
5.915 
1 The data were supplied by Waldemar RitT, of Kussell & Co. 
■ The sugar production data is based on an extraction of BO 7 percent and a boiler house efficiency of 100 
percent. Mean increase in favor of P.O.J. =5.4 tons of cane per acre. 
3 Averages of 4 plats, )>» acre in size, cut in Dec-em l»er when 17 « a months old. 
