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  1. 1
    Adubação da batata-doce com nitrogênio, fósforo e potássio em terrenos de "cerrado" Effect of nitrogen, phosphorus and potassium on sweet potatoes cultivated on "cerrado" soils
    by José Breda Filho, E. S. Freire, E. Abramides
    Published 1966-01-01
    “....) grown on poor "cerrado" soils. Two of these experiments were localized on areas cropped for some years...”
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    Article
  2. 2
    Adubação de batata-doce com diferentes doses de nitrogênio, fósforo e potássio Responses of sweet potatoes to increasing doses of nitrogen, phosphorus and potassium
    by José Breda Filho, E. S. Freire, E. Abramides
    Published 1966-01-01
    “... - one localized on fertile soil and the other on soil fertilized with that element in the previous crops...”
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    Article
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