SciELO - Scientific Electronic Library Online

vol.11 issue1Morphological and molecular characterization of accessions of lima-beans (Phaseolus lunatus L.)Spatial variability of weeds in two soil management systems author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand




Related links


Revista Brasileira de Engenharia Agrícola e Ambiental

Print version ISSN 1415-4366On-line version ISSN 1807-1929


COELHO, Eugênio F.; SANTOS, Delfran B. dos  and  AZEVEDO, Carlos A. V. de. Sensor placement for soil water monitoring in lemon irrigated by micro sprinkler. Rev. bras. eng. agríc. ambient. [online]. 2007, vol.11, n.1, pp.46-52. ISSN 1415-4366.

This research had as its objective the investigation of an alternative strategy for soil sensor placement to be used in citrus orchards irrigated by micro sprinkler. An experiment was carried out in a Tahiti lemon orchard under three irrigation intervals of 1, 2 and 3 days. Soil water potential, soil water content distribution and root water extraction were monitored by a time-domain-reflectometry (TDR) in several positions in soil profiles radial to the trees. Root length and root length density were determined from digital root images at the same positions in the soil profiles where water content was monitored. Results showed the importance of considering root water extraction in the definition of soil water sensor placement. The profile regions for soil water sensor placement should correspond to the intersection of the region containing at least 80% of total root length and the region of at least 80% of total water extraction. In case of tensiometers, the region of soil water potential above -80 kPa should be included in the intersection.

Keywords : tensiometer; soil water content; soil water potential; irrigation management.

        · abstract in Portuguese     · text in English     · English ( pdf epdf )


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License