Data/hora: 09/06/2024 17:28:53

Provedor de dados: | 63
País: | Brazil
Título: | Water retention and penetration resistance equations for the least limiting water range
Autores: | Leão,Tairone Paiva.
Data: | 2019-04-01
Ano: | 2019
Palavras-chave: | Nonlinear regression; Soil physical quality.
Resumo: | ABSTRACT: The least limiting water range is a soil physical quality indicator, which is useful to predict the optimum water range for plant growth in a given soil and to study the effects of soil use and management over this optimum water range by integrating the effects of available water, penetration resistance and air filled porosity. This study tested six equations to fit water retention and penetration resistance surface responses used to determine the least limiting water range and present a simple algorithm written in the open source software R for fitting, calculation and visualization of the least limiting water range. Five soils from Brazil and Canada, under different use and management conditions were used to test the functions. The results show that the three water retention surface responses had good statistical properties for fitting water retention and that two of the penetration resistance surface responses were adequate to fit the data, while one failed to achieve convergence in two instances. The open source code performed as well as the commercial statistical package SAS for fitting the penetration resistance and water retention equations.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019001200172
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/1678-992x-2017-0280
Formato: | text/html
Fonte: | Scientia Agricola  v.76 n.2 2019
Fonte: | info:eu-repo/semantics/openAccess