Not all Leucaena species release significant amounts of N during the incubation period ( Lupawyi and Haque , 1998 ) . The only effective organic sources of Ca and P to succeeding crops would appear to be animal manures ( Arco - Verde et ...

EXAMPLES Crop production : maize cobs , stalks ; cowpeas grain ( peas ) , leaves , stems ; Leucaena leucocephala fuelwood , timber , shade , mulch , fodder , soil enrichment ; medicinal herbs Livestock : cattle meat , milk , manure ...