JOHNSON, C M . ; ULRICH, Α., 1959. Analytical methods for use in plant analysis Bull. California Agr. Exp. Sta. (766): 25-78.
JONES, W.E., 1966. Nitrogen. In: Chapman, H.El e dD i a g n o s t i c
criteria for plants and soils, Berkely, University of California, p. 310-323.
JONES, H.E.; SCARSEPH, G.D., 1944. The calcium-boron balance in plants as related to boron needs. Soil Science 57: 15-24.
MALAVOLTA, Ε., 1976. Manual de Química Agrícola. Nutrição de plantas e fertilidade do solo, Sao Paulo, Ed. Agronômica
Ceres, 528 p.
MARCHAL, J.; BOURDEAUP, J.; 1972. Echantillonages foliaires de la grenadille
(Passi flora edulis
Sims var.flavioarpa).
Fruits 27( 4 ) : 307-311.
PAULSEM, G.M.; ROTIMI, A.O., 196a Phosphorus-zinc interaction in two soybean varieties differing in sensitivy to phosphorus nutrition. Proc. Soil. Sci. Soc. Amer. 32:
73-76.
PEREIRA, A.L.G., 1969. Uma nova doença bacteriana no
maracu-já
(Passiflora edulis
Sims) causada porXanthomonas
passiflora 1. n. sp. Arq. Inst. Biol. Sao Paulo 3 6( 4 ) :
163-74.