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| Lopes,Otavio Mitsuhiro Motizuki; Carrilho,Elma Neide Vasconcelos Martins; Lopes-Assad,Maria Leonor Ribeiro Casimiro. |
| Can vinasse accelerate the change of minerals in rock dust to obtain fertilizers, using residues from alcohol agro-industries and mining? Answering this question was the main objective of this study. Therefore, an experiment was set up in the laboratory in a completely randomized design using Polyvinyl Chloride (PVC) columns, in which the 0-50 cm layers of a clayey soil (eutroferric Red Oxisol) and sandy soil (Typic Quartzipsamment) were reproduced. We applied three different rates of basalt powder (0.0; 2.0, and 4.0 t ha-1) and one rate of vinasse (200 m³ ha-1) to the soils. The control was made by treatments with water (200 m³ ha-1) with the same rates of rock powder. Samples were first collected on the surface of each column (1, 15, 30, 45, 60, and 90... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Basalt powder; PH; Cation availability; Reuse of waste. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000500020 |
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| Boschi,Raquel Stucchi; Bocca,Felipe Ferreira; Lopes-Assad,Maria Leonor Ribeiro Casimiro; Assad,Eduardo Delgado. |
| ABSTRACT: The aim of this study was to evaluate the performance of pedotransfer functions (PTFs) available in the literature to estimate soil bulk density (ρb) in different regions of Brazil, using different metrics. The predictive capacity of 25 PTFs was evaluated using the mean absolute error (MAE), mean error (ME), root mean squared error (RMSE), coefficient of determination (R2) and the regression error characteristic (REC) curve. The models performed differently when comparing observed and estimated ρb values. In general, the PTFs showed a performance close to the mean value of the bulk density data, considered as the simplest possible estimation of an attribute and used as a parameter to compare the performance of existing models (null model). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: REC curve; Model evaluation; Soil database; Tropical soil. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000100070 |
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