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Phosphorus sources and fractions in an oxisol under no-tilled soybean Scientia Agricola
Galvani,Raquel; Hotta,Luiz Fernando Keyti; Rosolem,Ciro Antonio.
Phosphorus dynamics in soil can be modified by the use of no-till systems. Brazilian farmers have applied phosphorus fertilizers onto the soil surface to optimize machine field operations despite the lack of research supporting this practice. An experiment was conducted to study the effects of the application of two P sources onto soil surface and soybean seed furrows. The treatments consisted either of the application or not of 80 kg ha-1 of total P2O5 as natural reactive rock phosphate and superphosphate spread on the soil surface over the standing plant residues. At soybean planting, additional treatments (80 kg ha-1 of Natural Phosphate or Superphosphate) were applied at seed furrows. Soil was sampled down to 40 cm deep before soybean planting and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Natural phosphate; Phosphorus fertilizer; Mineral phosphorus; Organic phosphorus; Phosphorus fractioning.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000400014
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