143 
Pineapple Culture — Fertilizer Experiments, Florida Agricultural Ex- 
periment Station, Bulletin 83, 1906. 
Pineapple Culture— Handling the Crop, Florida Agricultural Experi- 
ment Station, Bulletin 84, 1906. 
Pineapple Culture — Effect of Fertilizers on Quality of Fruit — Florida 
Agricultural Experiment Station, Bulletin 101, 1910. 
Pineapple Growing — P. H. Eolfs, Farmers' Bulletin No. 140. 
Pineapple Growing in Florida, H. H. Hume, Tropical Life," August, 
1908. 
Pineapple Growing in Porto Kico, Bulletin 8, Porto Kico Agricultural 
Experiment Station. 
Report of Board of Agriculture — Jamaica — 1902. 
Eeport of the Department of Agriculture and Stock, Queensland, 
1904-5-6. 
HISTORICAL. 
The pineapple industry is comparatively young in Hawaii, but 
has grown rapidly and is well established. Naturally the first* 
work was the exploration of the possibilities of the industry, then 
the exploitation and financing, and finall}^ we find a tendency 
toward conservation and thrift. Not until about three years ago 
was a determined and systematic search made for an effective 
pineapple fertilizer, and the attention of the growers attracted to 
the fact that such a material was becoming necessary. Previous 
to this time the pineapple soils had been analyzed by various 
chemists^ and phosphoric acid recommended. This was applied 
in about all the various forms, mainly as basic slag, with more or 
less uncertain success. Steamed bonemeal and reverted super- 
phosphate were said to have given equally good results. A few 
haphazard tests were initiated by different people but were never 
carried to completion. 
During the year 1907 and spring of 1908 material was gathered, 
conditions observed, and plans made for the experiments reported 
in the paper. The piece of land selected was cheerfully placed 
at the writer's diposal, by Messrs. Ginaca Bros. It was plowed, 
harrowed and put into condition to receive the plants which were 
set June 15, 1908. 
OBJECT. 
The experiment had for its object the determination of the fer- 
tilizer best suited to the particular requirements of the pineapple, 
the effect of phosphoric acid, nitrogen and potash in their dif- 
ferent forms upon the life and growth of the plant, and approxi- 
mately the quantity necessary for its proper nourishment. We 
were also desirous of determining if the experinece gained in other 
1 Annual Eeports, Hawaii Agr. Exp. Sta. 1904-1907-1909. 
