Addressing subsoil acidity in the field with deep liming and organic amendments: Research update for a long-term experiment

Guangdi Li, Richard Hayes, Jason Condon, Sergio Moroni, Ehsan Tavakkoli, Helen Burns, Richard Lowrie, Adam Lowrie, Graeme Poile, Albert Oates, Andrew Price, Alek Zander

Research output: Book chapter/Published conference paperConference paperpeer-review

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A long-term field experiment was established in 2016 to manage subsurface soil acidity through innovative amelioration methods with the aim to increase productivity, profitability and sustainability. Deep placement of lime increased soil pH and reduced exchangeable Al% at the depth where lime was placed, but there was no evidence to show vertical alkalinity movement during the first 3 years of the experiment. Deep placement of lucerne pellets did not increase soil pH as much as expected, but reduced exchangeable Al%. Significant yield improvement was recorded from deep placement of lucerne pellets in a wet year (2016) but not in dry years experienced in 2017 and 2018, although large amount of mineral nitrogen was measured in autumn in 2017. Crop performance and soil chemical, physical and biological properties will be continually monitored to understand plant-soil interactions, the factors driving the differences in crop response to various treatments, and the long-term residual value of soil amendments.
Original languageEnglish
Title of host publicationProceedings of the 19th Australian Agronomy Conference, Wagga Wagga, New South Wales 25-29 August 2019
PublisherAustralian Society of Agronomy
Number of pages4
Publication statusPublished - 2019
Event19th Australian Agronomy Conference 2019 - Wagga Wagga Civic Theatre, Wagga Wagga, Australia
Duration: 25 Aug 201929 Aug 2019 (Conference website) (Conference program)


Conference19th Australian Agronomy Conference 2019
Abbreviated titleCells to Satellites
CityWagga Wagga
OtherThe 19th Australian Agronomy Conference will be held in Wagga Wagga, NSW from 25 – 29 August 2019. In the heart of the Riverina, Wagga Wagga has a range of rural industries across the region. Wagga has everything to offer the agronomy conference being surrounded by a mixed farming zone with irrigation to the west and permanent pasture enterprises to the east.
The conference theme Cells to satellites highlights the integrative nature of agronomy. Each of us work across a range of disciplines to optimise crop or pasture production for productivity and profitability. We have an increasing number of tools available to increase the precision and accuracy of our work; whether it is at the “cellular” level where DNA is mapped and biochemistry is unravelled or using “satellites” for remote sensing or guidance. The opportunities for enhancing our agronomy research is boundless.
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