Porous cup shape and installation mode influencing determinations of matric potential by tensiometers

Authors

  • Hélio Henrique Soares Franco Universidade Estadual de Maringá, CEP 87020-900, Maringá, PR.
  • Alvaro Pires da Silva In memoriam
  • Cássio Antonio Tormena Universidade Estadual de Maringá, CEP 87020-900, Maringá, PR.
  • Camila Jorge Bernabé Ferreira Universidade Estadual de Maringá, CEP 87020-900, Maringá, PR.
  • Márcio Renato Nunes Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, CEP 13418-260 Piracicaba, SP.
  • Renato Paiva de Lima Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, CEP 13418-260 Piracicaba, SP.
  • Paulo Leonel Libardi Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, CEP 13418-260 Piracicaba, SP.

DOI:

https://doi.org/10.1590/S1678-3921.pab2017.v52.25064

Keywords:

puncture tensiometers, rounded porous cup, soil mud

Abstract

The objective of this work was to determine the measurement accuracy of the soil water matric potential (ψm) by puncture tensiometers with either rounded or pointed porous cups, installed with or without “soil mud”, and to compare the performance of these tensiometers with that of tensiometers equipped with mercury manometers. The experiment was conducted in a Ultisol, in a randomized complete block design, in a factorial arrangement with five replicates. Puncture tensiometers with rounded porous cups, installed with “soil mud”, present more elevated accuracy for ψm determination in a wider measurement range, resembling tensiometers equipped with mercury manometers in drying soil.

Downloads

Published

2017-12-21

How to Cite

Franco, H. H. S., Silva, A. P. da, Tormena, C. A., Ferreira, C. J. B., Nunes, M. R., Lima, R. P. de, & Libardi, P. L. (2017). Porous cup shape and installation mode influencing determinations of matric potential by tensiometers. Pesquisa Agropecuaria Brasileira, 52(12), 1291–1294. https://doi.org/10.1590/S1678-3921.pab2017.v52.25064

Issue

v.52, n.12, dez. 2017

Section

SCIENTIFIC NOTES