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Navegação Ciência e Agrotecnologia por autor "Guelfi, Douglas Ramos"

Navegação Ciência e Agrotecnologia por autor "Guelfi, Douglas Ramos"

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  • Ammonia volatilization from blends with stabilized and controlled-released urea in the coffee system
    Chagas, Wantuir Filipe Teixeira; Guelfi, Douglas Ramos; Caputo, André Luiz Carvalho; Souza, Taylor Lima de; Andrade, André Baldansi; Faquin, Valdemar (Editora UFLA, 2016-09)
    Application of stabilized and controlled-release urea blends can reduce the losses of N-NH3 as compared to conventional urea. The aim of this study was to quantify ammonia volatilization from conventional nitrogen fertilizers ...
  • Monoammonium phosphate coated with polymers and magnesium for coffee plants
    Guelfi, Douglas Ramos; Chagas, Wantuir Filipe Teixeira; Lacerda, Jordana Reis; Chagas, Rafael Mattioli Rezende; Souza, Taylor Lima de; Andrade, André Baldansi (Editora UFLA, 2018-05)
    The coating of phosphate fertilizer granules with polymers and magnesium (Mg) is a technology that can improve phosphorus (P) use efficiency and mitigate problems of low Mg supply in coffee crops. The objective of this ...
  • Nitrogen loss by volatilization of nitrogen fertilizers applied to coffee orchard
    Dominghetti, Anderson William; Guelfi, Douglas Ramos; Guimarães, Rubens José; Caputo, André Luiz Carvalho; Spehar, Carlos Roberto; Faquin, Valdemar (Editora UFLA, 2016-03)
    Ammonia volatilization (N-NH3) is one of the main pathways of Nitrogen loss reducing nitrogen use efficiency in coffee orchard. This work aimed at quantifying ammonia volatilization (N-NH3) losses from N-sources to be used ...

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