13 
Analyses of pineapple soils. 







No. 183 No. 185 No. 156 No. 157 
Soil constituents and reaction. (plants (plants (plants (plants 
chlorotic). | chlorotic). | chlorotic). | healthy). 
Per cent. Per cent. Per cent. Per cent. 
PASONIDIG TRRETCD= ou sone ces ios san eo ele aicis he scigememes 70. 26 73. 07 67.15 82.13 
Oras CaO Vos =. <5 sc ok ee sotto eee aeide = ale ead ceak s -13 YS eee ee -10 
MAAN (OD Oe Set os wos ate Saat e sicla ste Bale,s cielabwre eek aateiae 10. 47 8. 27 11. 42 2.01 
Wiapnesia (MEO) tsar sso seme ebicbisteclioss ts clewec nec ces -74 1.12 1.17 21 
Ferric and aluminic oxids (Fe203 and AlgO3).........-. 7.58 7.42 9. 57 8.77 
Phosphorus pentoxid:(PaQp). ... 2. 25..0cescssecss eee -18 -21 -07 - 29 
MOLINE MHS LLCh ae ems een ee :s ccm geo ses dace. es 11.35 10.18 12. 41 1.33 
RGiAlss Se sere ena Be Seem cs ost SE SE coc decenee 100. 71 100;'39)) (PR -Sessse= 100. 85 
— 
a ee PO eee ae Siu eT) .16 21 
IS i CeO NC ae = we Ree ons Labo digas emas eee es 4. 60 1.89 1.95 5. 44 
MAG DOH Cio mien Os). 24 Ya oo 55 Seek B56 bc eaidin desea 15 5.18 6. 66 None. 
Calemm carbonate (CaCOg)). «.se<- «t Saca-ce<se-e- Rael 16. 27 11.78 15.15 None. 
VER HOn! LOMIDEIS 4a 55. sethoett hE coptten ae SS et Alkaline. | Alkaline. | Alkaline. Alkaline. 



The three soils producing chlorotic plants are very similar to the 
soils in Survey III and are strongly calcareous, while the good soil 
(No. 157) differs only in containing no calcium carbonate. 
SOIL SURVEY VII. 
Plantation of Golden Fruit Co., about 3 miles from Bayamén: At 
various times about 40 acres were planted with Red Spanish pine- 
apples. About half the acreage produced remarkably large plants 
that bore a good crop of large-sized fruit. Most of the plants were 
fertilized with a complete commercial fertilizer and a few received 
some barnyard manure. The soil of these fields was a loose, loamy 
sand with considerable organic matter and is represented by samples 
186 and 187. 
Another field of about 20 acres was planted in the fall of 1909. A 
year later about 50 per cent of the plants had lost most of their green 
color and many had died. The 50 per cent that were unaffected 
were of normal dark green and were distributed in irregular patches 
throughout the field. The soil in this case was a loose sand that in 
spots contained many shell particles. Sample 229 was taken from 
a patch of colorless plants and 230 from an area a few yards distant, 
where the plants were green. It was observed that wherever in the 
field the soil contained many shell particles the plants were chlorotic 
and where these particles were absent the plants were green. The 
soil also was tested in many places with acid, and wherever the 
chlorotic plants were found the effervescence showed the presence of 
carbonate of lime, while wherever the green plants were found there 
was no eflervescence. 
[Bull. 11] ‘ 
