Garry O'Leary

Resource sharing in intercropping models and a case study with APSIM in southern Australia

F Githui, V Jha, T Thayalakumaran, BP Christy, GJ O'Leary

Journal article  |  2023  |  European Journal of Agronomy

Various benefits of intercropping systems have been reported worldwide. However, fewer modeling studies of these systems have been..

Elevated CO2 in semi-arid cropping systems: A synthesis of research from the Australian Grains Free Air CO2 Enrichment (AGFACE) research program

Glenn J Fitzgerald, Michael Tausz, Roger Armstrong, Joe Panozzo, Piotr Trebicki, Mahabubur Mollah, Sabine Tausz-Posch, Cassandra Walker, James G Nuttall, Maryse Bourgault, Markus Loew, Debra Partington, Clayton R Butterly, Shu Kee Lam, Robert M Norton, Garry J O'Leary

Journal article  |  2022  |  ADVANCES IN AGRONOMY, VOL. 171

Climate change impacts to crop production are likely to be greatest in semi-arid regions already constrained by marginal growing c..

Intercropping-Evaluating the Advantages to Broadacre Systems

Uttam Khanal, Kerry J Stott, Roger Armstrong, James G Nuttall, Frank Henry, Brendan P Christy, Meredith Mitchell, Penny A Riffkin, Ashley J Wallace, Malcolm McCaskill, Thabo Thayalakumaran, Garry J O'Leary

Journal article  |  2021  |  AGRICULTURE-BASEL

Intercropping is considered by its advocates to be a sustainable, environmentally sound, and economically advantageous cropping sy..

Machine learning produces higher prediction accuracy than the Jarvis-type model of climatic control on stomatal conductance in a dryland wheat agro-ecosystem

Alireza Houshmandfar, Garry O'Leary, Glenn J Fitzgerald, Yang Chen, Sabine Tausz-Posch, Kurt Benke, Shihab Uddin, Michael Tausz

Journal article  |  2021  |  AGRICULTURAL AND FOREST METEOROLOGY

We compared Support Vector Machine (SVM) and Random Forest (RF) machine learning approaches with the widely used Jarvis-type pheno..

Does Elevated [CO2] Only Increase Root Growth in the Topsoil? A FACE Study with Lentil in a Semi-Arid Environment

Maryse Bourgault, Sabine Tausz-Posch, Mark Greenwood, Markus Low, Samuel Henty, Roger D Armstrong, Garry L O'Leary, Glenn J Fitzgerald, Michael Tausz

Journal article  |  2021  |  PLANTS-BASEL

Atmospheric carbon dioxide concentrations [CO2] are increasing steadily. Some reports have shown that root growth in grain crops i..

Ameliorating dense clay subsoils to increase the yield of rain-fed crops

Peter Sale, Ehsan Tavakkoli, Roger Armstrong, Nigel Wilhelm, Caixian Tang, Jack Desbiolles, Bill Malcolm, Garry O'Leary, Geoffrey Dean, David Davenport, Sam Henty, Murray Hart

Journal article  |  2021  |  ADVANCES IN AGRONOMY, VOL 165

The yield of rain-fed crops needs to increase to meet the requirements of a growing human population. One way to achieve this is t..

Integrating crop modelling and production economics to investigate multiple nutrient deficiencies and yield gaps

Kerry J Stott, Brendan Christy, Malcolm McCaskill, Kurt K Benke, Penny Riffkin, Garry J O'Leary, Robert Norton

Journal article  |  2020  |  The Australian Journal of Agricultural and Resource Economics

A method is described for integrating crop modelling and production economics to quantify optimum applications of multiple nutrien..

A reduced-tillering trait shows small but important yield gains in dryland wheat production

Alireza Houshmandfar, Noboru Ota, Garry J O'Leary, Bangyou Zheng, Yang Chen, Sabine Tausz-Posch, Glenn J Fitzgerald, Richard Richards, Greg J Rebetzke, Michael Tausz

Journal article  |  2020  |  GLOBAL CHANGE BIOLOGY

Reducing the number of tillers per plant using a tiller inhibition (tin) gene has been considered as an important trait for wheat ..

An allelic based phenological model to predict phasic development of wheat (Triticum aestivum L.)

B Christy, P Riffkin, R Richards, D Partington, TB Acuña, A Merry, H Zhang, B Trevaskis, G O'Leary

Journal article  |  2020  |  Field Crops Research

We developed a photoperiod-corrected thermal model that can predict wheat phenology based solely on the combination of photoperiod..

Effect of heat wave on N-2 fixation and N remobilisation of lentil (Lens culinaris MEDIK) grown under free air CO2 enrichment in a mediterranean-type environment

Shahnaj Parvin, Shihab Uddin, M Bourgault, A Delahunty, J Nuttall, J Brand, G O'Leary, GJ Fitzgerald, R Armstrong, M Tausz

Journal article  |  2020  |  Plant Biology

The stimulatory effect of elevated [CO2] (e[CO2]) on crop production in future climates is likely to be cancelled out by predicted..