Buscar
Mostrando ítems 61-70 de 3304
Avaliação de um fosfato natural e de termofosfatos quanto aos teores totais de metais pesados e à disponibilidade de micronutrientesNatural phosphates and thermal-phosphates evaluation concerning the heavy metals total contents and the micro-nutrients availability
(Universidade Federal de Viçosa, 2017)
Efeito do silício e do fósforo na disponibilidade de metais pesados do solo pelo extrator mehlich-1Effect of silicon and phosphorus on the availability of soil heavy metals by mehlich-1 extractor
(Editora da Universidade Federal de Lavras, 2003)
Acúmulo e disponibilidade de cromo, cádmio e chumbo em solos tratados com lodo de esgoto por onze anos consecutivos
(Universidade Estadual de Londrina (UEL), 2012-01-01)
The sewage sludge used for agricultural purposes provides many benefits to soil, but it contain harmful elements to environment, that infers in a great attention on its use. The aim of this work was to evaluate the effects ...
Acúmulo e disponibilidade de cromo, cádmio e chumbo em solos tratados com lodo de esgoto por onze anos consecutivos
(Universidade Estadual de Londrina (UEL), 2012-01-01)
The sewage sludge used for agricultural purposes provides many benefits to soil, but it contain harmful elements to environment, that infers in a great attention on its use. The aim of this work was to evaluate the effects ...
Availability of toxic metals in saline-sodic soils treated with sewage sludges and biosolidsDisponibilidad de metales tóxicos en suelos salino-sódicos tratados con lodos residuales y biosólidos
(Universidad Autónoma del Estado de Hidalgo, 2016)
Metal-binding organic macromolecules in soil: 1. Hypothesis interpreting the role of soil organic matter in the translocation of metal ions from rocks to biological systems
(1977)
The role of naturally-occurring soil organic matter (SOM) in the translocation of metal ions from parent materials to biological systems is discussed. To explain the movement of essential elements, a hypothesis or model ...
Solar Radiation Effect on the Complexation Capacity of Aquatic Humic Substances with Metals
(Soc Brasileira Quimica, 2012-10-01)
This study had as main objective to assess the effect of solar radiation on the capacity of the aquatic humic substances (AHS) to complex Al3+, Cr3+, CrO42- and Ni2+. Microcosms were prepared with AHS from Preto River ...
Solar Radiation Effect on the Complexation Capacity of Aquatic Humic Substances with Metals
(Soc Brasileira Quimica, 2012-10-01)
This study had as main objective to assess the effect of solar radiation on the capacity of the aquatic humic substances (AHS) to complex Al3+, Cr3+, CrO42- and Ni2+. Microcosms were prepared with AHS from Preto River ...
Evaluation of some metals in Brazilian coffees cultivated during the process of conversion from conventional to organic agriculture
(ELSEVIER SCI LTD, 2009)
The aim of this study was to evaluate the presence of nutrients and toxic elements in coffees cultivated during the process of conversion, on organic agriculture, in southwest Bahia, Brazil. Levels of the nutrients and ...