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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

How accurate are pedotransfer functions for bulk density for Brazilian soils?

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Autor(es):
Boschi, Raquel Stucchi [1] ; Bocca, Felipe Ferreira [2] ; Ribeiro Casimiro Lopes-Assad, Maria Leonor [3] ; Assad, Eduardo Delgado [4]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Soil Sci, ESALQ, Ave Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
[2] Univ Estadual Campinas, FEAGRI, Ave Candido Rondon 501, BR-13083875 Campinas, SP - Brazil
[3] Univ Fed Sao Carlos, Ctr Agr Sci, Rod Anhanguera, Km 174, BR-13600970 Araras, SP - Brazil
[4] Embrapa Agr Informat, Ave Andre Tosello 209, BR-13083886 Campinas, SP - Brazil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Scientia Agricola; v. 75, n. 1, p. 70-78, JAN-FEB 2018.
Citações Web of Science: 3
Resumo

The aim of this study was to evaluate the performance of pedotransfer functions (PTFs) available in the literature to estimate soil bulk density (pb) 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 (R-2) and the regression error characteristic (REC) curve. The models performed differently when comparing observed and estimated pb 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 models developed by Benites et al. (2007) (BEN-C) and by Manrique and Jones (1991) (M\& J-B) presented the best results. The separation of data into two layers according to depth (0-10 cm and 10-30 cm) demonstrated better performance in the 10-30 cm layer. The REC curve allowed for a simple and visual evaluation of the PTFs. (AU)

Processo FAPESP: 15/06804-0 - Serviços ambientais da mata ciliar: efeito de diferentes larguras de mata ciliar na interceptação de sedimentos das áreas agrícolas do entorno
Beneficiário:Raquel Stucchi Boschi
Linha de fomento: Bolsas no Brasil - Pós-Doutorado