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All publications of “Marcelo Augusto Batista”

3 results

Biometric Responses of Soybean to Different Potassium Fertilization Management Practices in Years with High and Low Precipitation

Michel Esper Neto, Evandro Antonio Minato, Marcos Renan Besen, Tadeu Takeyoshi Inoue, Marcelo Augusto Batista

17/Jul/2018

ABSTRACT Brazilian soybean producers commonly apply maintenance potassium (K) fertilization during cultivation to restore the K taken up by plants; however, this measure can modify the morphophysiological plant characteristics, since the functions of K are closely related with plant growth and development. This study assessed the morphological changes in soybean plants in response to K rates, sowing fertilization, and the application periods of K fertilization in a Latossolo Vermelho eutroférrico (Oxisol) under a no-tillage system, located in the municipality of […]

Kinetics of Thermal Transformation of Synthetic Al-Maghemites into Al-Hematites

Adriele Galeti Nonaka, Marcelo Augusto Batista, Antonio Carlos Saraiva da Costa, Tadeu Takeyoshi Inoue, Taiana Gabriela Moretti Bonadio, Ivan Granemann de Souza

01/Apr/2017

ABSTRACT Maghemite (γ-Fe2O3) and hematite (α-Fe2O3) are important iron oxides in Brazilian soils derived from basalt. Maghemite can transform into hematite when exposed to high temperatures. However, isomorphic substitution (e.g., Al3+) may largely influence this process. We analyzed the kinetics of thermal transformation of Al-maghemites into Al-hematites and some of its mineralogical aspects. Synthetic substituted maghemites with different degrees of Al-substitution (0.0, 1.0, 2.0, 2.9, 3.8, 5.6, 6.7, 10.0, 12.0, and 17.1 mol% Al) were subjected to a temperature of […]

Thermal Transformation and Characterization of Synthetic Al-Substituted Maghemites (γ-Fe2-xAlxO3)

Adriele Galeti Nonaka, Marcelo Augusto Batista, Tadeu Takeyoshi Inoue, Antonio Carlos Saraiva da Costa

17/Oct/2016

ABSTRACT Burning is a common practice in tropical areas and related changes in mineralogy might affect the chemical and physical behavior of soils. Maghemite is a common iron oxide in soils formed from basic rocks in tropical regions. This mineral and hematite are the main pigments in these soils and exhibit high magnetization stemming from the precursor magnetite formed during the weathering process of primary minerals. The objective of the present study was to analyze changes in color, magnetic suceptibility […]