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Bragantia

Print version ISSN 0006-8705On-line version ISSN 1678-4499

Bragantia vol.38 no.1 Campinas  1979

http://dx.doi.org/10.1590/S0006-87051979000100030 

NOTA

 

Adubação corretiva com fósforo e potássio em um solo de baixa fertilidade1

 

Correction of a low fertility soil with phosphorus and potassium

 

 

Heitor Cantarella; Bernardo Van Raij2

 

 


SUMMARY

Band applications of P and K were not adequate for corn in an low fertility soil with a cambic B horizon of Itararé to reach satisfactory yields. Substancial increases in production were obtained by broadcast applications of potassium and phosphorus combined with band application, even under the conditions of high acidity of the experiment (pH 4.9). The rock phosphate patos-de-minas was an effective P source for broadcast application, although less efficient than triple superphosphate.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

Recebido para publicação em 18 de setembro de 1978.

 

 

1 Trabalho parcialmente realizado com recursos do projeto "Avaliação Agronômica de Fosfatos Naturais Brasileiros" (Convênio IAC/EMBRAF'A/FINEP).
2 Com bolsa de suplementação do CNPq.

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