In Erythrina edulis plants, N, Ca, P, K and Mg defficiences were induced. The variables studied included: leaf area, the height of the young plants, the dry weight of its upper parts and roots, the external visible symtomatology of the defficiences and the content of nutrients in the tissue, al ninety days. The experiment was undertaken by applying different doses to twelve treatments and then repeating these with teh, chosen at random. Nitrogen showed the lowest results for all the variables studied followed by phosphorus and potassium, Treatments, where half-doses of the elements had been applied, showed significant differences compared with when complete treatments were applied; the exception being with the application of a half-dose of Potassium. The differences were noted in leaf area, the height of the young plants abd the dry weight of its upper parts, Leaf area was seen to be affected in all the treatments, except the complete treatments, due to the extent of defoliation in the young plants. N, P, and K were the first to show visual symtoms of deficiency. Ca and Mg, after the solutions had been applied, showed at 45 and 60 days respectively.