|
|
|
|
|
| Souza,Camila Prado Cenciani de; Abreu,Cleide Aparecida de; Andrade,Cristiano Alberto de; Abreu,Mônica Ferreira de. |
| Efficient analytical methods for the quantification of plant-available Zn contained in mineral fertilizers and industrial by-products are fundamental for the control and marketing of these inputs. In this sense, there are some doubts on the part of the scientific community as well as of the fertilizer production sector, whether the extractor requested by the government (Normative Instruction No. 28, called 2nd extractor), which is citric acid 2 % (2 % CA) (Brasil, 2007b), is effective in predicting the plant availability of Zn via mineral fertilizers and about the agronomic significance of the required minimal solubility of 60 % compared to the total content (HCl) (Brasil, 2007a). The purpose of this study was to evaluate the alternative extractors DTPA,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Maize; Micronutrients; Industrial waste; Solubility; Zea mays. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000400018 |
| |
|
|
| Souza,Camila Prado Cenciani de; Abreu,Cleide Aparecida de; Cunha,José Francisco da; Costa,Geraldo Magela da; Andrade,Cristiano Alberto de. |
| Alternative copper (Cu) sources could be used in fertilizer production, although the bioavailability of copper in these materials is unknown. The objective of this study was to evaluate the extractants neutral ammonium citrate (NAC), 2 % citric acid, 1 % acetic acid, 10 % HCl, 10 % H2SO4, buffer solution pH 6.0, DTPA, EDTA, water, and hot water in the quantification of available Cu content in several sources, relating them to the relative agronomic efficiency (RAE) of wheat grown in a clayey Latossolo Vermelho eutrófico (Oxisol) and Neossolo Quartzarênico (Typic Quartzipsamment). Copper was applied at the rate of 1.5 mg kg-1 as scrap slag, brass slag, Cu ore, granulated copper, and copper sulfate. The extractants 10 % HCl, 10 % H2SO4, and NAC extracted... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Extractants; Industrial waste; Micronutrients; Triticum aestivum; X-ray diffraction. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200553 |
| |
|
|
|
