Shaded coffee V: results of two biennial cyclos 1967/1968 - 1970/71

Abstract

This paper deals with data obtained in 1967, 1968, 1970 and 1971 in shaded and unshaded coffee plots at Piracicaba, São Paulo, Brazil. The results can be summarized as follows : a. the production, in shaded and unshaded plots, show differences statisticaly significant; the productions in shaded plots was now higher, due to the destruction of the shade trees and acumulation of organic substract; b. the percentage of cofee berry borer infestation was higher in shaded plots as compared with unshaded ones; c. the percentage of green, ripened and dry fruits depends on the year and on the harvest time.