EDIBLE CANNA IN WAIMEA DISTRICT OF HAWAII 41 
At the end of the nineteenth month the two-seed planting yielded 
43.93 tons per acre and the one-seed planting, 42.93 tons. The crop 
should be allowed to grow until the new growth produces rootstocks 
of undesirable size for starch making, or until the older rootstocks 
show signs of deteriorating. For starch manufacture the crop should 
be harvested at 17 to 18 months. 
Progressive studies of the growth of the plant showed it to be of a 
cyclic nature rather than uniform. Periods of comparative dormancy 
were followed by periods of rapid growth. Probably this is partly 
inherent in the plant and partly due to climate. 
Analyses of the different parts of the canna plant show that the 
tops are of value both as feed and as fertilizer. The stalks from an 
acre of land contain the equivalent of over a ton of high-grade 
fertilizers. An acre of rootstocks removes from the soil the equiva- 
lent of 1,200 pounds of fertilizer. During the process of manufacture 
the pulp loses about four-fifths of the total fertilizer elements con- 
tained in the rootstocks. The pulp is thought to have excellent 
possibilities as a carbohydrate feed. 
The process of manufacture of edible-canna starch is described. 
LITERATURE CITED 
(1) Chung, H. L., and Ripperton, J. C. 
1924. edible canna in Hawaii. Hawaii Agr. Expt. Sta. Bui. 54, 16 
p., illus. 
(2) Henry, A. J. 
1925. Hawaiian rainfall. U. S. Mo. Weather Rev. 53: 10-14, illus. 
(3) Henry, W. A. 
1911. feeds and feeding. Ed. 11, rev. and rewritten, 613 p. Madi- 
son, Wis. 
(4) Johnson, M. O., and Ching, K. A. 
1918. COMPOSITION AND DIGESTIBILITY OF FEEDING STUFFS GROWN 
in Hawaii. Hawaii Agr. Expt. Sta. Press Bui. 53, 26 p. 
(5) Kelley, W. P., McGeorge, W. [T.], and Thompson, A. R. 
1915. the soils of the Hawaiian islands. Hawaii Agr. Expt. 
Sta. Bui. 40, 35 p. 
(6) McGeorge, W. T. 
1915. EFFECT OF FERTILIZERS ON THE PHYSICAL PROPERTIES OF 
Hawaiian soils. Hawaii Agr. Expt. Sta. Bui. 38, 31 p., illus. 
(7) 
1917. composition of Hawaiian soil particles. Hawaii Agr. 
Expt. Sta. Bui. 42, 12 p. 
(8) Ripperton, J. C. 
1924. THE HAWAIIAN TREE FERN AS A COMMERCIAL SOURCE OF 
starch. Hawaii Agr. Expt. Sta. Bui. 53, 16 p., illus. 
(9) 
1927. CARBOHYDRATE METABOLISM AND ITS RELATION TO GROWTH IN 
the edible canna. Hawaii Agr. Expt. Sta. Bui. 56, 35 p., 
illus. 
(10) Starratt, H. E. 
1924. REPORT OF THE COMMITTEE ON CULTIVATION AND WEED CON- 
TROL. Hawaii. Planters' Rec. 28: 48-55. 
(11) United States Department of Agriculture, Weather Bureau. 
191&-26. climatological data. Hawaii section, v. 15-22. 
Honolulu. 
(12) 
1926. SUMMARY OF THE CLIMATOLOGICAL DATA FOR THE UNITED 
STATES, BY SECTIONS. HAWAII SECT. U. S. Dept. Agr., 
Weather Bur. Bui. W, ed. 2, v. 3, illus. 
