Proposition of models for erodibility estimation of Brazilian Oxisols
The existent methods for indirect determination of erodibility have not been adequate when applied to tropical soils, mainly in relation to Brazilian (Oxisols). So, this study aimed to develop models for determination of erodibility of this soils group, from morphological, physical, chemical and mineralogical variables of the soil. In this way, using 19 latosols from the various Brazilian geographical regions, 129 determinations (independent variables) were made, whose results were submitted to multiple linear regression analyses in backward using the SAS program, correlating them with the erodibility directly obtained in the field through soil losses plots (dependent variable). It was possible to develop five models, with increasing degrees of complexity and precision, for the estimation of the erodibility of Brazilian latosols, involving 37 determinations that presented significance.
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Pesquisa Agropecuaria Brasileira
1999
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rev-pab-br-article-55642010-06-29T17:31:35Z Proposition of models for erodibility estimation of Brazilian Oxisols Proposição de modelos para estimativa da erodibilidade de latossolos brasileiros Silva, Marx Leandro Naves Curi, Nilton Ferreira, Mozart Martins Lima, José Maria de Ferreira, Daniel Furtado Latosols; hydrical erosion; soil losses erosão hídrica; perdas de solo The existent methods for indirect determination of erodibility have not been adequate when applied to tropical soils, mainly in relation to Brazilian (Oxisols). So, this study aimed to develop models for determination of erodibility of this soils group, from morphological, physical, chemical and mineralogical variables of the soil. In this way, using 19 latosols from the various Brazilian geographical regions, 129 determinations (independent variables) were made, whose results were submitted to multiple linear regression analyses in backward using the SAS program, correlating them with the erodibility directly obtained in the field through soil losses plots (dependent variable). It was possible to develop five models, with increasing degrees of complexity and precision, for the estimation of the erodibility of Brazilian latosols, involving 37 determinations that presented significance. Os métodos existentes para determinação indireta da erodibilidade não têm se mostrado adequados quando aplicados aos solos tropicais, particularmente no tocante aos latossolos brasileiros. Sendo assim, objetivou-se, com este estudo, desenvolver modelos para a estimativa da erodibilidade desse grupamento de solos, a partir de variáveis morfológicas, físicas, químicas e mineralógicas do solo. Foram feitas em 19 latossolos das várias regiões geográficas brasileiras, 129 determinações (variáveis independentes), cujos resultados foram submetidos à análise de regressão linear múltipla em "backward" utilizando o programa SAS, relacionando-se com a erodibilidade obtida diretamente no campo através de parcelas de perdas de solo (variável dependente). Foi possível desenvolver cinco modelos, com graus crescentes de complexidade e precisão para a estimativa da erodibilidade dos latossolos brasileiros, englobando 37 determinações que apresentam significância. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 1999-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/5564 Pesquisa Agropecuaria Brasileira; v.34, n.12, dez. 1999; 2287-2298 Pesquisa Agropecuária Brasileira; v.34, n.12, dez. 1999; 2287-2298 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/5564/2755 |
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Silva, Marx Leandro Naves Curi, Nilton Ferreira, Mozart Martins Lima, José Maria de Ferreira, Daniel Furtado |
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Silva, Marx Leandro Naves Curi, Nilton Ferreira, Mozart Martins Lima, José Maria de Ferreira, Daniel Furtado Proposition of models for erodibility estimation of Brazilian Oxisols |
| author_facet |
Silva, Marx Leandro Naves Curi, Nilton Ferreira, Mozart Martins Lima, José Maria de Ferreira, Daniel Furtado |
| author_sort |
Silva, Marx Leandro Naves |
| title |
Proposition of models for erodibility estimation of Brazilian Oxisols |
| title_short |
Proposition of models for erodibility estimation of Brazilian Oxisols |
| title_full |
Proposition of models for erodibility estimation of Brazilian Oxisols |
| title_fullStr |
Proposition of models for erodibility estimation of Brazilian Oxisols |
| title_full_unstemmed |
Proposition of models for erodibility estimation of Brazilian Oxisols |
| title_sort |
proposition of models for erodibility estimation of brazilian oxisols |
| description |
The existent methods for indirect determination of erodibility have not been adequate when applied to tropical soils, mainly in relation to Brazilian (Oxisols). So, this study aimed to develop models for determination of erodibility of this soils group, from morphological, physical, chemical and mineralogical variables of the soil. In this way, using 19 latosols from the various Brazilian geographical regions, 129 determinations (independent variables) were made, whose results were submitted to multiple linear regression analyses in backward using the SAS program, correlating them with the erodibility directly obtained in the field through soil losses plots (dependent variable). It was possible to develop five models, with increasing degrees of complexity and precision, for the estimation of the erodibility of Brazilian latosols, involving 37 determinations that presented significance. |
| publisher |
Pesquisa Agropecuaria Brasileira |
| publishDate |
1999 |
| url |
https://seer.sct.embrapa.br/index.php/pab/article/view/5564 |
| work_keys_str_mv |
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