TY - SER AU - Alves,L.S. AU - Torres Junior,C.V.T. AU - Fernandes,M.S. AU - Santos,A.M.dos AU - Souza,S.R.de TI - Soluble fractions and kinetics parameters of nitrate and ammonium uptake in sunflower ("Neon" Hybrid) KW - GIRASSOL KW - HELIANTHUS ANNUUS KW - OLEO VEGETAL KW - NITROGENIO ER -