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	Provedor de dados Scientia Agricola (1) Rev. Bras. Ciênc. Solo (1) Autor Cunha,José Francisco da (1) Kiehl,J. C. (1) Prochnow,L. I. (1) Prochnow,Luís Ignácio (1) Ventimiglia,Ariel Francisco Candiotti (1) van Raij,B. (1) Mais... Palavra-chave Water-insoluble P (2) Acidulated P fertilizers (1) Acidulated phosphates (1) Available P (1) Maize (1) Phosphorus sources (1) Water-soluble P (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2002 (1) 2001 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Effect of water and citrate solubility on agronomic effectiveness of acidulated phosphates in three consecutive corn crops Rev. Bras. Ciênc. Solo Prochnow,L. I.; van Raij,B.; Kiehl,J. C.. In the process of phosphate rock acidulation, several impure P compounds may be formed along with the desirable Ca and NH4 phosphates. Such compounds normally reduce the content of water-soluble P and thus the agronomic effectiveness of commercial fertilizers. In order to study this problem, a greenhouse experiment consisting of three consecutive corn crops was conducted in samples of a Red-Yellow Latosol (Typical Hapludox) in a completely randomized design (6 x 2 x 2), with four replicates. Six commercial fertilizers were added to 2 kg of soil at a rate of 70 mg kg-1 P, based on the content of soluble P in neutral ammonium citrate plus water (NAC + H2O) of the fertilizers. Fertilizer application occurred either in the original form or leached to remove... Tipo: Info:eu-repo/semantics/article Palavras-chave: Water-soluble P; Water-insoluble P; Acidulated P fertilizers; Maize. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832002000300018 Field evaluation of water or citrate soluble phosphorus in modified phosphate rocks for soybean Scientia Agricola Prochnow,Luís Ignácio; Cunha,José Francisco da; Ventimiglia,Ariel Francisco Candiotti. Ten P fertilizers were collected (commercial fertilizers) or synthesized (experimental sources) in order to obtain single superphosphates varying in water and citrate solubility. A standard source of P was also produced by crystallization of the water-soluble fraction of a triple superphosphate. Eleven P sources were band applied to a medium textured Xanthic Hapludox, in Bahia, Brazil (low content of resin-extractable P) at a rate of 80 kg ha-1 of NAC + H2O (neutral ammonium citrate plus water) soluble P2O5, with soybean as the crop which was grown to maturity. A check plot (control) was included in the study. Three of the P sources [single superphosphate produced from Araxa phosphate rock (PR), low-grade single superphosphate produced from Lagamar PR and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Acidulated phosphates; Available P; Phosphorus sources; Water-insoluble P. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162001000100025 Registros recuperados: 2 Primeira ... 1 ... Última

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