32 
BULLETIN 35, PUERTO RICO EXPERIMENT STATION 
choice of soils for P.O.J. 2878 helps to explain it- satisfactory sugar 
yields in this district. 
The marked adaptability of P.O.J. 2878 for the clay lands of the 
San German Valley is illustrated in figure 6. P.O.J. "2878 arrowed 
sparingly, and its growth was never seriously interrupted thereby. 
P.O.J. 2878 grew taller and stooled better than did B.H. 10(12) at 
Central Eureka. The two rows of P.O.J. 2878 averaged 3.8 meters 
tall (average of 25 eanes), and 340 eanes per 31 meters of row. The 
two rows oi B.H. 10(12) averaged 3.48 meters tall, and only 232 canes 
per Z1 meters of row P.O.J. 2878 had an advantage of 46.7 percent 
more cane per given length of row. 
Data on general field plantings for the 1932 crop of Russell A. ( Jo. in 
the San German Valley are given in table 23. 
Table 23. — Results of sugarcane variety tests by Russell tfe Co. in Uu San d'erman 
Valley district l 
Variety, culture, size of field, and character of soil 
B.H. 10(12) (llH-month first ratoons cut in December): 
Field no. 5 (2.2 acres), Hacienda San Francisco, irrigated clay loam 
P.O.J. 2878 (ll^S-month first ratoons cut in December): 
Field no. 5 (6 acres), Hacienda San Francisco, irrigated clav loam 
P.O.J. 2878 (1214-month first ratoons cut in Janu:. 
Field no. 5 (1.63 acres), Hacienda San Francisco, irrigated clay loam... 
B.H. 10(12) (12J4-month first ratoons cut in January): 
Field no. 5 (7.32 acres), Hacienda San Francisco, irrigated clay loam... 
P.O.J. 2878 (18H-month gran cultura cut in January): 
Field no. 2 (6.55 acres), Hacienda Margarita, unirrigated clay loam 
B.H. 10(12) (18H-month gran cultura cut in January): 
Field no. 2 (5.2 acres), Hacienda Margarita, unirrigated clay loam J 
P.O.J. 2878 (15J4- to 16-month gran cultura cut in December): 
Field no. 2 (18 acres), Hacienda Castro, unirrigated clay loam.. 
P.O.J. 2878 (16-month gran cultura cut in December): 
Field no. 2 (7 acres), Hacienda Castro, unirrigated clay loam 
P.O.J 2725 (16- to 16H-month gran cultura cut in December and January): 
Field no. 2 (10 acres), Hacienda Castro, unirrigated clay loam.. 
P.O.J. 2878 (17-month gran cultura cut in January : 
Field no. 5 (15 acres), Hacienda Filial Amor, unirrigated 
P.O.J. 2725 (16- to 17 1 , 2-month gran cultura cut in December to February): 
Field no. 5 (34.5 acres), Hacienda Filial Amor, unirrigated 
P.O.J. 2725 (17-month gran cultura cut in January): 
Field no. 304 (3 acres), Hacienda Constancia, unirrigated, very good, 
fairly loose alluvial soil ».. 76.37 
P.O.J. 2725 (17-month gran cultura cut in January): 
Field no. 301 (10.5 acres), Hacienda Constancia, partly irrigated, very 
good, fairly loose alluvial soil 3 
P.O.J. 2878 (16H-month gran cultura cut in Janu 
Field no. 304 < 4 acres). Hacienda Constancia, unirrigated 
P.O.J. 2878 (16- to 17-month gran cultura cut in Deceml>er and January): 
Field no. 302 (25 acres), Hacienda Constancia. partly irrigated.. 
1 These data were supplied by Owen Proverbs, district superintendent of cultivation. 
J More rotten canes than in P.O.J, field. 
3 Soils so designated by the field superintendent. 
The sugar in cane of P.O.J. 2878 was invariably satisfactory, 
ranging from 10.5 to 12.5 percent; it seldom dropped below 1 1 percent, 
and compared well with that of B.H. 10(12) in adjoining fields. The 
superior sugar and cane productions of P.O.J. 2878 corroborate those 
in tbe cane-variety trial at Filial Amor. Much of the P.O.J. 2878 
area was harvested Late in December and early in January, and good 
sugar yields were not therefore owing to delayed harvest, and to favor- 
able ripening conditions, such as prevailed during the months pre- 
ceding harvest of the cane in the variety trial at Coloso. 
Acre 
yield 
of 
cane 
Normal juice 
analyses 
Su- 
crose 
Pu- 
rity 
Tons 
30.49 
Prr- 
ctnt 
14.9 
Per- 
cent 
83.21 
34.59 
16.1 
85.6 
37.92 
14.2 
78.6 
29.29 
13.9 
79.8 
46.85 
15.8 
84.0 
36.39 
14.1 
73.32 
14. S 
81.7 
69.13 
14.9 
82.3 
56.71 
15.5 
84.7 
'63.95 
15.3 
83.0 
56.41 
13.7 
80.7 
76.37 
14.6 
88.0 
64.69 
15.3 
87.4 
88.19 
14. f. 
83.5 
63.64 
14.6 
S3 
Sugar 
in 
cane 
