Jm. Njoroge et al., EVALUATION OF METHODS OF REPLACING ESTABLISHED UNCAPPED ARABICA COFFEE WITH A NEW IMPROVED CULTIVAR, Experimental Agriculture, 30(2), 1994, pp. 217-221
An evaluation of methods for replacing established uncapped, multiple
stem, arabica coffee cv. French Mission with cv. Ruiru 11 arabica hybr
id in the field was carried out at Ruiru, Kenya. When Ruiru 11 was rai
sed on a single stem using the hedgerow system, a mixed stand of Ruiru
11 and French Mission gave the largest mean yields of clean coffee. T
he next largest yields were obtained by the complete replacement of Fr
ench Mission with Ruiru 11 grown at a spacing of 2 X 1.5 m and trained
on a single stem system. However, in economic terms, replacing the es
tablished coffee partially or sequentially with Ruiru 11 trained on a
single stem proved to be the best method.