15 
Analyses of pineapple soils. 

No. 232 No. 233 
Soil constituents and reaction. (plants (plants 
healthy). | chlorotic). 
Per cent. Per cent. 
PENG LEG OBIS occa cat tae eee njstar eta © = iain oe atatejnyprorateia\atelamiSraiajateracreimeialciowerwte= 63. 40 77. 64 

Veta hal UG B= ee ae oe BT |e ee ea 09 - 10 
eG (CO ee co). 5 ee Re raat ete Rims sats & = ere ctacio rales Siete aso alr neianna widiminrwin eral 2.44 5.00 
MEIOHESIA: CMO CLs Sok Set ene aot One Re S20 ceeniaisteuthemen one veeselnelewe tae ease 5. 67 Trace. 
Herric and aliiminic oxidsi(W6:03, and AlgOs3) ... ...2...--2.-02--0-lsesenetieeece 18. 86 8.05 
IPHOsphoOrus PENVOXIG CPOs) mee = Shae oko aie oe w ciaialel erecta neintewee Streator A Sho 09 15 
ICES V Gast: Ui soe Ee Se SS oe ee ee ote 8.45 
ANTE Re 2 MR eS. Seeker eS ae cee a 97. 66 99. 69 
ROE OCG DF BRS oe Se 2 SS eee eS a a eee ae ae . 06 .12 
ULSTER PR Sf eo AR IME oa wicie sia OSes aca! Sine Prcrarerane lo aroraranstarceerch rar atarthararetcrarcfercrs 1.59 9.95 
Scie alarar io ON pease aes SS ee SE reap ks be oni ee ae nee oe None. 1.45 
VAGINA CANOGMNES) (CACO) htc Bie bets Wie oo aa ar tapreeler quid nn rhclere tera aria ae! None. 3.30 
Seesee LION COP MEEMES 2. EAC oe | a= SUIT He 3 oUF nanan irae arar eal Sicictararchciorerotatatm’etetcvorere Neutral. Alkaline. 
Here again we find the good soil devoid of calcium carbonate, 
while the bad soil is calcareous and poorly drained. 
SOIL SURVEY IX. 
Near the road from Rio Piedras to Carolina there are several 
patches of pineapples showing the characteristic chlorosis. The 
size of these spots varies from an acre to 200 plants, and they occur 
on four different plantations. As they are all similar, they will be 
considered together. The soil on both sides of the road is for the 
most part a silicious sand well suited for pmeapples, as is evidenced 
by the large acreage and the uniform success of the plantings. 
Directly bordering on the road, however, some patches of yellow 
and white plants were observed. The soil in these spots when tested 
with acid effervesced strongly, showing the presence of much car- 
bonate of lime. The soil in the immediate neighborhood, where 
healthy plants were found, gave no effervescence. A large number 
of spots in the different fields where healthy plants were growing 
were tested, and in no case was carbonate of lime present. 
The road on which these plantations border is constructed of lime- 
stone rock. In the construction and maintenance of this road 
limestone rock was piled in the fields alongside and there pulverized. 
During the pulverization much carbonate of lime was incorporated 
in the soil. It seems that this is the origin of such small areas of 
calcareous soil as occur in the silicious sand. 
Messrs. De Sola and Wolf, at kilometer 9, have about an acre of 
chlorotic plants. Samples 204 and 205 were taken from the bleached 
area and samples 207 and 208 from adjacent green areas. The 
plants in the bleached area are exposed to the effect of more car- 
bonate of lime than appears from the soil analyses, since the drainage 
water from the road runs down over this spot. 
[Bull. 11] 
