Abstract: For working out the relation between the ecological property and cultivation technique of Leucaena leucocephala cv Salvador, the growth and behaviour of several seedlings were studied with different treatments in acid soils. The studies reported in this paper on the seedlings showed that with calcium superphospate applicaion relatively high biomass could be gained even though no lime or urea was provided. Moderate liming improved growth markedly. A little urea promoted growth when accompanied by P application. Urea repressed germination.