Statistical Models in Plant Diagnosis and Calculating Recommended Nitrogen Rates

  • Paulo Cezar Rezende Fontes
  • Marcelo Cleón de Castro Silva
  • Glauco Vieira Miranda


The potato, Solanum tuberosum L., is an important crop in Brazil and in the world. In addition to other factors, the potato plant needs an adequate nutrient supply. Best N management in potato plants is aimed not only to improve tuber yield and quality but also to increase N fertilizer use efficiency and to reduce environmental risk. It is common to use mathematical models in establishing relationships between N rate and crop yield and plant N content. Those relationships are essential to best N management in potato plant at diagnosis and recommendation phases. In establishing a plant index it is necessary to adjust the data using some mathematical model. Therefore, either in the assessment of plant index or in the rate recommendation it is necessary to select a model. In the text will be discussed the relationship between potato yield and nitrogen rates obtained by different mathematical models and how the model chose affects plant nitrogen indices under Brazilian conditions.


Potato Plant Quadratic Model Fertilization Rate Tuber Yield Fertilizer Rate 
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To CNPq and FAPEMIG by awarding research productivity grants and for financial resources. To UFV for the physical and professional infrastructures.


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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Paulo Cezar Rezende Fontes
    • 1
  • Marcelo Cleón de Castro Silva
    • 1
  • Glauco Vieira Miranda
    • 1
  1. 1.Departamento de FitotecniaUniversidade Federal de Viçosa, s/n.Estado de Minas GeraisBrazil

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