Conclusion
The problem of overcoming the zero income phrase associ-
ated with rubber cultivation has necessitated the research into
the environmental and economic implication of intercropping
of rubber with other early maturing high value crops. This
study revealed that not only did intercropping of rubber with
cooking banana resulted to improve soil fertility in terms of soil
nutrient and biological activities (earth worm) but it also short-
ened the maturity period of the tree compared to the sole.
However, intercropping banana at closer spacings within the
avenue needs further investigation because of the reduction in
soil K stock. From the information gathered from the study,
intercropping with cooking banana at 4 × 2 m within the rubber
avenue ensures better rubber performance in terms of yield and
soil resources conservation.