Optimum sensor location for irrigation scheduling of cotton in a field with variable soil

Xin Qiao, Ahmad Khalilian, José Payero, Young Han, Charles Privette

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Fields in the southeastern coastal plain region have a high degree of variability in soil type and topography, with some areas of the field wetter or dryer than other areas. Efficient irrigation in these fields is best achieved using a sensors-based variable rate irrigation (VRI) system, which takes all of these variations into consideration. However, where the moisture sensors are located in a field can significantly affect irrigation scheduling decisions. Replicated tests were conducted during 2012 and 2013 growing seasons to determine the most accurate and affordable sensor technology for irrigation scheduling in cotton production and to determine the optimum sensor location in a production field with soil variations. The tests involved four commercially available moisture sensors. The results suggested that, in a production field with soil variability, it would be beneficial to install moisture sensors in management zones with higher EC readings (heavier soil textures) to obtain maximum yield and WUE. However, this may not be true during a dry year, since the 2012 and 2013 growing seasons had above 500 mm of precipitation compared to average rainfall of 280 mm. The results also showed that decagon sensor offered more promise for irrigation scheduling than the rest of the sensors tested, since it offered good accuracy and is affordable.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014
PublisherAmerican Society of Agricultural and Biological Engineers
Pages1511-1515
Number of pages5
ISBN (Electronic)9781632668455
StatePublished - 2014
Externally publishedYes
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014 - Montreal, Canada
Duration: Jul 13 2014Jul 16 2014

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014
Volume2

Conference

ConferenceAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2014, ASABE 2014
Country/TerritoryCanada
CityMontreal
Period7/13/147/16/14

Keywords

  • Cotton
  • Irrigation scheduling
  • Precision agriculture
  • Sensors
  • Soil types

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Mechanical Engineering

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