11 
but so low that during heavy rains the ground water approached the 
surface. Most of the plants did fairly well, but a strip about 10 
yards wide, running transversely across the field, exhibited the char- 
acteristic chlorosis, having ivory white leaves with small patches of 
green. The field had been fertilized with stable manure. Citrus 
fruits and gandules grew exceptionally well on this plantation. Sam- 
ple 148 is of the soil where the pineapples were healthy, and 149 is 
from a patch of chlorotic plants. These samples were taken by one 
of the station staff. Sample 154 is another sample of the bad soil 
and 155 of the good soil sent in by Mr. Gay. The samples of good 
and bad soil were taken only a few yards apart. 
Analyses of pineapple soils. 

No. 148 No. 149 No. 154 No. 155 
Soil constituents and reaction. (plants (plants (plants (plants 
healthy). | chlorotic). | chlorotic). | healthy). 


Per cent. Per cent. Per cent. Per cent. 
93.28 44. 0: 63.19 93. 




ase DIG ANAHCR. oo5 = 5 te ee Se edad cars <iecdmmmenn 2 1 
OG AST CIGD Nia. cerns Pn ee oe nose Sateen .07 04 Rey 522 
LETT GM GEN 0) ee RE, * ee Bee © eee Open 1.92 22.19 16.02 1.00 
MR STIESIS, (NEE) 5520 5 ob sos. SER A. RL .14 2. 50 1.58 ay 
Ferric and aluminic oxids (Fe.03 and AlgO3).........-- sot 2.31 1.59 91 
Phosphorus, pentoxid: (Bo@5) = 52 322 Seb as soe oes been .04 . 09 07 .02 
WOlain ennai ieee sas. 220 § Lise oe 2 ey Bee's te 4.12 27.84 18.16 ae GL 
PEOua > ee ee et. eS Rat ht Bon. Sere 100. 08 98.99 100. 93 99. 20 
Dit agelcerey Gn) eer ee SOAs 6 Se ee See OL ee ee a ahs .08 . 30 22 atl 
ih aris eS See a See SS aes eee .58 ~20 3.30 1.07 
Maahon! diomd(@Os)3s ope gste so: Waceemee buk bcc wees 50 16.96 10. 69 09 
Caigium:carbonate (CaCOg) <-. 3822-2 cbc 1.14 38. 56 24. 32 . 20 
(Reeighromotonlitantsc ce, . ss satieete. | Sapte ae Bee Alkaline. | Alkaline.| Alkaline. Alkaline. 
It will be seen that 149 is, on the whole, richer in plant food than 148 
but that the bad soil is here again strongly calcareous while the good 
soil has but little calcium carbonate. The same difference is true of 
154and 155. The calcium carbonate in the bad soil plainly originated 
from disintegrated coral. 
SOIL SURVEY V. 
Property of Mr. Pizé, Dorado, P. R.: This plantation consisted of 
about 30 acres of red Spanish pineapples. The greater part of the 
plants were on a white, almost pure silica sand; the rest of the plants 
were on a red clay of varying stiffness. Only two patches of chlo- 
rotic plants were found. These were growing in a fairly stiff loam 
on a hill near the seashore. In one spot there were three small 
plants almost ivory white in color. These were surrounded by large 
vigorous plants of a dark-green color. Sample 197 is taken from 
about the roots of the white plants. The soil here, however, was 
only 3 inches deep, and the roots of the plants were directly on the 
surface of the coral rock; there were numerous coral nodules in the 
{ Bull. 11] 
