40 
BULLETIN 35, PUERTO HI CO EXPERIMENT STATION 
Taiu.i: 28. Data on uprooting in minefield* of P.O.J. 9878 Bugarcane, 19S1 
Pro- 
ility where grown, nil" lire, sire of 
field, and character of loll ; 
Btooli 
ob- 
Berved 
Stools 
Up- 
rooted 
par* 
Hon up- 
rooted 
> 4 to \i 
M inp 
BgM 
cutting 
How planted 
.V uiiih, r 
Xi, mbet 
Percent 
Centimeter* 
Central Coloao, Corsica district, gran cui- 
1,378 
148 
117 
188 by 150 
Ir. holes 22 centimeters 
lwr;t (. r » acres!, louse sandy alluvial soil. 
deep. 
Central Pagan, gran culture, Uiasco (11 
1.070 
99 
9.2 
90 by 135 
On top of bank. 
acres), loose sandy alluvial soil. 
Sin Qennan Valley district of Rnsaall <v 
2. 100 
381 
15.9 
90 by 135 
Do. 
Co., BonnigUerce, gran cultura (33 
. cla\ loam, fairly oompeot. 
San German Valley district of Roseau 1 a 
303 
M 
12.8 
90 by 135 
Do. 
Co., Filial Amor, gran culture (-» acres), 
clay loam, fairly compact. 
Central Kureka, llormii'iieros, mm cul- 
1. 163 
24 
1.64 
(') 
Do. 
tura (()..'< acre), alluvial clay loam of fairly 
compact type. 
Central Fortune, Fortuna, gran culture (. r > 
2,232 
5 
.22 
30 by 135 
In deep furrows. 
acres), loose alluvial clay loam. 
Central Auuirre, (iuayama, jiran cultura 
1,840 

0.00 
75 by 150 
In boles. 
(7 acres), heavy clay. 
Farm of Alcules Zeno, Vauco, gran cultura 
1,000 

0.00 
30 by 135 
In deep furrows. 
(10 acres), loose, alluvial soil. 
Central Anuirre, Cuayama, primavera (0.2 
1,000 
110 
11.0 
30 by 150 
Do. 
acre), loose alluvial soil. 
1 All soils so designated by the superintendents of the respective fields. 
* Planted as long cane. 
Where planting was on top of the banks and open spacing was 
practiced, the proportion of uprooted stools ranged roughly from 9 to 
16 percent; and usually where close spacing and deep planting were 
used practically no uprooting occurred. These observations are in 
harmony with the results of the spacing trial with P.O.J. 2878 con- 
ducted by the Insular Department of Agriculture at Central Merce- 
dita, Ponce; in plats with the closest spacing, 105 centimeters between 
rows, there was least uprooting. 10 In the 1932 crop, when most of 
the P.O.J. 2878 area was planted either as long cane or spaced 30 by 
135 centimeters per cutting, no storm damage was reported even from 
those areas where cane is planted on top of the banks. 
THE ADVANTAGES OF RATOONING P.O.J. 2878 
Assuming an equal sugar production for P.O.J. 2878 and for 
B.H. 10(12) in the plant-cant 4 crop, P.O.J. 2878 has several advan- 
tages in succeeding crops giving it the preference over B.H. 10(12). 
These are mosaic resistance, ability when young to recover after a 
flood, prolific stooling habit, superior ratooning power, and reduced 
cultivation costs. As a result of the mosaic resistance, the cost of 
roguing is eliminated. This is an important factor near Coloso 
where conditions favor the spread of the disease and the roguing of 
B.H. 10(12) increases replanting costs. 
On the lowlands of Coloso that are subject to overflow, 4-month-old 
B.H. 10(12) plantings did not recover after either the 1928 or the 
1932 hurricane, whereas adjoining fields of P.O.J. 2878 and P.O.J. 2725 
of the same age recovered completely. All varieties were under water 
for nearly a week on each occasion. Fifty acres of B.H. 10(12) at 
Coloso were destroyed by overflow resulting from the 1928 hurricane. 
Data on replanting costs were collected on 314 acres of P.O.J. 2878 
first ra toons and on a similar area of B.H. 10(12) of the 1932 crop at 
10 Richardson Kintz, P. la ntODJ H < a6n Dl m kvas variedades de caSa y sus resultados expebi- 
mentale>. l'.K. Dept. Agr. and Com., Insular Sta., Bui. 38: 54. 1931. 
