Japanese Journal of Tropical Agriculture
Online ISSN : 2185-0259
Print ISSN : 0021-5260
ISSN-L : 0021-5260
Experimental Cultivation of Coca at Izu
IV. Effect of the soil moisture on the growth, yield and cocaine content of coca
Yukio MIYAZAKIHiroshi WATANABE
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1965 Volume 9 Issue 2 Pages 79-83

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Abstract

1) Under different soil moisture contents, pot experiments were carried out in the greenhouse in 1958 and 1963 to know the relation between the soil moisture and the growth, yield, and cocaine content of the coca plant.
2) About 90-80% of the water capacity of the soil gave the best growth and the highest yield of leaves, on the other hand, under dry condition below 40% or over-moist condition near 100%, a remarkable retardation in growth was recognized.
3) The cocaine content of the leaves seemed not to be affected by the soil moisture.

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