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| Souza,Matheus Fonseca de; Soares,Emanuelle Mercês Barros; Silva,Ivo Ribeiro da; Novais,Roberto Ferreira; Silva,Mailson Félix de Oliveira. |
| The increase of organic acids in soils can reduce phosphorus sorption. The objective of the study was to evaluate the competitive sorption of P and citrate in clayey and sandy loam soils, using a stirred-flow system. Three experiments were performed with soil samples (0-20 cm layer) of clayey (RYL-cl) and sandy loam (RYL-sl) Red Yellow Latosols (Oxisols). In the first study, the treatments were arranged in a 2 × 5 factorial design, with two soil types and five combinations of phosphorus and citrate application (only P; P + citrate; and citrate applied 7, 22, 52 min before P); in the second, the treatments were arranged in a 2 × 2 factorial design, corresponding to two soils and two forms of P and citrate application (only citrate and citrate + P); and in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Incubation time; Latosol; Organic acids; Stirred-flow. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000400011 |
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| Haridasan,Mundayatan. |
| Soils of the cerrado biome, mostly oxisols and deep sandy entisols, are acid, dystrophic and poor in available nutrients. These soils are not very different from soils that occur in the Amazon region. However, the open savanna physiognomies of cerrado with lower biomass of their different components are deficient in nutrients at the ecosystem level, unlike the Amazon forests which retain high nutrient reserves in their live biomass. Field crops are susceptible to aluminum and manganese toxicities, besides nutrient deficiencies, in cerrado soils and do not grow well in the absence of liming and fertilization. However, concepts of nutrient deficiencies and toxicities, well established for cultivated plants, should not be extended to native species in natural... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aluminum toxicity; Latosol; Mineral nutrition; Soil fertility. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000300003 |
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| SOARES, W. V.; MACEDO, M. C. M.; VILELA, L.; SOUZA, O. C. de. |
| Um experimento no campo foi conduzido num Latossolo Roxo Alico muito argiloso, fase cerradao, em Campo Grande - MS, durante 66 meses (1978- 1984), com os seguintes objetivos: Obter a curva de resposta da Brachiaria decumbens ao fosforo e estimar os niveis criticos de fosforo no solo para o estabecimento e a manutencao de pastagem com essa graminea. Os tratamentos constaram de sete doses de fosforo: 0,40, 80, 160, 320, 640 e 1280kg/ha de P205 como superfosfato triplo, em parcelas de 7x5 m, num delineamento de blocos ao acaso com quatro repeticoes. Dez dias antes da aplicacao dos tratamentos, 2,6t/ha de calcario dolomitico foram incorporadas a 20 cm profundidade. Incluiu-se nos tratamentos adubacao basica constituida de: 50, 20, 50, 5 e 1 kg/ha,... |
| Tipo: Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) |
Palavras-chave: Cultivar Basilisk; Phosphate; Basilisk; Brazilian savannas; Feed grasses; Fertilization; Latosol; Pasture; Phosphorius; Planta gramínea; Red latosol; Savanna.; Adubação; Brachiaria Decumbens; Cerrado; Fósforo; Fosfato; Gramínea Forrageira; Latossolo Roxo; Pastagem; Solo.; Ferralsols; Fertilizer application; Forage; Fertilizers; Phosphorus; Varieties.; Soil. |
| Ano: 1999 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/546467 |
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