Such trees must be of rapid growth ; they should add to the quality of the soil . and give efficient shade and protection . ... such as Erythrina ( glauca . poeppigiana and velutina ) : Gliricidia sepium ; Pithecolobium saman , and Inga ...

The pollarding height choosen depends upon the vigour of the trees , i.e. a more vigorous tree can withstand lower pollarding heights and indeed this would be necessary to reduce possible shading effects . Apart from G. sepium ...

Nutrient addition into soil by leaves of Cassia siamea and Gliricidia sepium grown on an ultisol in Southern Nigeria . ... Shading effects of alley cropped Leucaena leucocephala on weed biomass and maize yield at Mtwapa , Coast Province ...