12 
BULLETIN 35, PUERTO RICO EXPERIMENT STATIOX 
Table 8. — Ii< suits of wuparcam v<iri> \ n upland soils with good surface 
drainage at CentraU Conttanda, Carmen, and Pagan, I 
Variety, culture, rin <>f field, and character of Bofl 
P.O.J. >:h ( 17-month irmn cultura cut in Januai 
Field mi 20 Marieao, unirrigated upland ( 
B C i-4 (18-montb gran eultura cal InJanu 
Kit'Mno n , Maricao, onlrrigated upland i 
I'lU 2878 (* gran cultura cut in Jam. 
Field no. 1 (5 acres), Mucarabones/ unirrigated hillside 
sandy loam 
B.C. 12/4 (» gran cultura cut in l)ecemt>er to Jam. 
Field no. 9 (17.5 acres), Mucarabones. unirri^-ated hillside 
sand y clay 
P.O.J. 2S7N (lOH-month gran cultura cut in Fehn: 
Field no. 7 (IS acres), Mucarabones. unirriiratcd hillside 
clay and stony clay and Bandy loam (equal ami.i. 
S.C. 12/4 (iy .'-month gran cultura cut in February): 
Field no. « (15.5 acres), Mucarabones, unirrit?ated hillside 
clay and stony clay and sandy loam (equal amounts) 
P.O.J. 2878 (16-month gran cultura cut in Fehn; 
Field of 2 plats (J 6 acre), Trinidad,* unirrigated upland 
compact clay 4 ... 
P.O.J. 2725 (18-month gran cultura cut in February): 
Field of 2 plats (>s acre), Trinidad, unirrigated upland 
compact clay 5 . 
P.O.J. 2878 (* gran cultura cut in January : 
Field no. 9 (6 acres*. Campanula, 1 semiupland clay loam.. 
P.O.J. 2878 ( 2 gran cultura cut in January): 
Field no. 12 (14.25 acres), Campanilla, semiupland day 
loam 
P.O.J. 2878 (16-month gran cultura cut in January): 
Field no. 39 (lOacres), San Antonio, 7 irrigated well-drained 
upland slope sandy loam 
S.C. 12/4 (15-month gran cultura cut in January): 
Field no. 36 (31 acres), San Antonio, irrigated well-drained 
upland slope sandy loam. 
Acre 
j laid 
41.00 
55.14 
59.20 
60.00 
29.28 
31.95 
27.00 
33.00 
I juice 
anal; 
. 
15.60 
12.50 
12.79 
Purity 
77. 00 
11.09 
9.50 
11.98 
9.65 
10.73 
Tout 
4.55 
2.28 
6.18 
4.98 
5.24 
2.44 
2.66 
3.54 
1 Maricao belongs to Central Carmen. 
1 Age of cane not eiven as data not available. 
5 Mucarabones belongs to Central Constancia. 
4 Trinidad belongs to Central Pagan. 
• Soils so designated by E. H. Barrow, district field superintendent of Russell & Co., Central Pagan. 
• Campamlla belongs to Central Constancia. 
7 San Antonio belongs to Central Carmen. 
Data on a field of stiff clay at Central Pagan, Anasco, are included 
with those of the north coast because of the similarity of the reaction 
of P.O.J. 2878 which, in these widely separated districts, appears to 
be particularly well adapted to upland soils. With the exception of 
the more friable clay loam and sandy loam fields the percentag 
sugar in cane was satisfactory, ranging from 10 to 12 percent, and 
in even' instance was superior to that of the competing variety grown 
in the same or in adjoining fields. P.O.J. 2878 was superior in sugar 
production, usually by a wide margin of approximately l}i tons of 
sugar per acre. These data arc in sharp contrast with those of gran 
cultura either on more friable flooded lowlands, or on lowlands where 
the soil was heavy to fairly heavy (table 9), and where the sugar in 
cane of P.O.J. 2878 ranged from 6. So to 9.57 percent, and sugar 
production was inferior to that of B.H. 10(12), the nearest competing 
variety. 
Gran cultura on lowland* with inadequate artificial or surface drain- 
age. — Along the north coast gran cultura P.O. 1 . 2878 on lowlands 
with inadequate artificial or surface drainage gave, as shown in 
table 9, good cane production, but generally a very low sucrose 
content. Considerable risk is apparently involved in cropping 
P.O.J. 2878, particularly gran cultura, on most lowlands of this area. 
