s 
BULLETIN 35, PUERTO RICO EX PERIMENT STATION 
Table 4. — Results of sugarcant Iral Fajardo, 1981 and 1932- 
mtinued 
DUBING THE 1983 QRINDDS I attuned 
Variety, culture, size of Bald, ;m<i character 
B B 10(13) (18-month gran culture cu( in February): 
Plaid no. 30 (9.63 teres), Ban Pedro, irrigated fbt lowland 
silt loam. 
B ii 10(12) (is-nionth gran oultura cut in Febru 
Field do. 19 (10.3 acres), Ban Pedro, Irrigated ti;it lowland 
silt loam - 
p I i j 2878 do-month prima vera oul in April): 
Field no. 147 <: mte Marin, unirrigated undu- 
lated, >iit loam 
B H 10(13) (10-month prima vera cut In April: 
Field no. 1^4 (0.18 acres), Banta Maria, unirrigated undu- 
lated, silt loam 
P.O.J. 2*7n (13-month primavers oul In M 
Field no. 88 (3.06 acres), Santa Rita, irrigated flat lowland 
brownish loam > 
B.H. 10(12) (13-month primaverecul In M 
Field do. 7t) (ii acres), Santa Bita, irrigated flat lowland 
silt loam 
] leld 
of cane 
Normal juice 
Purity 
16.31 
Peroral 
11 f, 
63 l 
9.2 
24.20 
16.70 
13 o 
L'4 11 
17 16 
84.9 
12 2 
17.10 
12.3 
50.49 
15.90 
11.3 
Avail- 
able 96° 
per acre 
Tons 
6.16 
4.03 
2.90 
2.94 
5.27 
5.71 
Most of this cmiic was grown .under irrigatioD on lowland silt loam. 
B.H. 10(12) was generally superior to P.O.J. 2878 on irrigated low- 
lands of gran cultura during both years. As in the variety trial, the 
apparent superiority of B.H. 10(12) was due to superior tonnage 
rather than to higher percentage of sugar in cane. In the 1931 crop 
the sugar yield of P.O.J. 2878 in -even fields ranged from 10.7 to 14 
percent. In the 1932 crop the sugar yields were also very good, 
ranging, except in one field, from 10.3 to 12.3 percent. A 12-6-8 
fertilizer, at the rate of 400 pounds per acre, was applied to the 1931 
crop when it was 1% months old; and ammonium sulphate, at the 
same rate, was applied l}- 2 to 2 months later. A 10-6-16 fertilizer, at 
the rate of 600 pounds per acre, was applied to the 1932 crop when it 
was 1 month old; and ammonium sulphate, at the rate of 400 pounds 
per acre, was applied 1 to 2 months later. 
Almost the only other data available comparing P.O.J. 2878 with 
B.H. 10(12) in eastern end of Puerto Rico are from an unirrigated flat 
lowland clay soil at Central Roig near Humacao. On 10.95 acres 
P.O.J. 2878 averaged 63.9 tons of cane per acre and 6.14 tons of sugar 
per acre, whereas on 22.39 acres B.H. 10(12) averaged only 47.9 tons 
of cane per acre and 4.98 tons of sugar per acre. The sugar in cane 
of P.O.J. 2878 was only 9.62 percent, whereas that of B.H.l0(12) was 
10.41 percent. B.H. 10(12) was, however, harvested January 30, 
2 weeks later. The low sucrose content was apparently due to poor 
drainage rather than to early harvest, as 38.09 acres of P.O.J. 2878 
gran cultura on an undulating, or semiupland, field at Central Roig, 
harvested January 15, averaged 49.8 tons of cane per acre with 11.31 
percent of sugar in the cane. 
Throughout the holdings of The Fajardo Sugar Co. P.O.J. 2878 in 
general field trials gave cane tonnage that usually barely equaled or 
was inferior to that of B.H. 10(12 I. Most of the data reported were 
from silty loam types of lowland and, with the exception of the variety 
trial, data on upland soils or soils of a heavy type are very meager. 
