We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
AVALIAÇÃO DE MÉTODO ALTERNATIVO E DE CONDUTIVÍMETROS NA DETERMINAÇÃO DA CONDUTIVIDADE ELÉTRICA DO SOLO.
- Authors
Araújo da Silva, Tonny José; Fonseca dos Santos, Matheus Nogueira; Bicioni Pacheco, Adriano; Bonfim-Silva, Edna Maria; Franco Duarte, Thiago
- Abstract
The aim was to evaluate, by means of statistical indexes, the estimate of the electrical conductivity of the soil by the methodology 1:1 ratio (soil: distilled water) and alternative conductivimeters, in a dystrophic Oxisol. The soil was subjected to the salinization process, with different concentrations of potassium chloride. It was adopted as a reference, the electrical conductivity of the solution extract soil measured by the mCA 150 Tecnal ® conductivity meter. The 1:1 ratio methodology and the other conductivimeters (WT-3000iCEL®, CD-203 Phtek® and Hidroponia Digital CE®) were evaluated by statistical indices regarding correlation, precision, accuracy and errors. The 1:1 ratio methodology showed Muito bom precision and correlation (R² = 0.940; r = 0.969), but underestimated the values (PBIAS = 19.952), requiring data corrections using the linear regression model. The conductivity meters WT-3000 iCEL® and portable CD-203 Phtek® presented, in general, poor performance by most indexes, due to the limit of the readings of up to 1.998 dS m-1 and the underestimation of the data. The Hidroponia Digital CE®, obtained Good to Very Good performance in the reference methodology, but in the 1:1 ratio it obtained a greater underestimation and presented unsatisfactory indexes. Therefore, the methodology and alternative conductivimeters underestimate the electrical conductivity of the soil and need corrections.
- Subjects
ELECTRIC conductivity; SOIL solutions; POTASSIUM chloride; DISTILLED water; SOIL moisture; SOIL salinity
- Publication
Revista Brasileira de Agricultura Irrigada - RBAI, 2020, Vol 14, Issue 2, p3987
- ISSN
1982-7679
- Publication type
Article
- DOI
10.7127/rbai.v14n101154