Chloride mass balance models are an economic method of assessing the effects of cotton farming systems on deep drainage in Vertosols

T.B. Weaver, Nilantha Hulugalle

    Research output: Contribution to journalMeeting Abstractpeer-review

    Abstract

    Steady state and transient state chloride mass balance (CMB) models have been used to estimate deep drainage nunder different furrow irrigated cotton based rotations and tillage systems in Northern New South Wales since 2000 at the Australian Cotton Research Institute (ACRI) near Narrabri. The change in stored chloride in the soil profile allows these models to estimate drainage based on the concentration of stored chloride and volume of applied irrigation water and rainfall. The CMB models were validated against a variable tension lysimeter during the 2006/07 and 2008/09 cotton seasons. Deep drainage at 2 metres from the variable tension lysimeter during the 2006/07 and 2008/09 seasons was 74 and 54 mm whereas the chloride mass balance steady state model estimated 45 and 26 mm, respectively.
    Original languageEnglish
    Pages (from-to)19pp
    Journal2nd Australian Cotton Research Conference 2015: Science securing cotton's future
    Publication statusPublished - 2015
    Event2nd Australian Cotton Research Conference 2015 - University of Southern Queensland, Toowoomba
    Duration: 1 Jan 2015 → …

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