Abstract
Most of the cultural trials and experiments with cinchona prior to 1900 were recorded as observations. With the possible exception of the work by Cowgill (1) the published information with reference to the effects of fertilizer applications on growth and alkaloid content of cinchona deal mainly with established trees (3, 4, 8, 9,11). Although it is generally conceded that the first few months are the most critical period in the life of the cinchona plant, little or no experimental data are available as to the nutritional requirements of young seedlings. Nitrogen and phosphorus are two essential mineral elements that are usually deficient in tropical soils. In view of this fact an experiment was initiated to obtain information on the effects of three levels of each of those
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