A5036065661- Agriculture Sustainability and Environmental Impact
- Pasture and Agricultural Systems
- Ruminant Nutrition and Digestive Physiology
- Climate change impacts on agriculture
- Soil and Water Nutrient Dynamics
- Soil Carbon and Nitrogen Dynamics
- Agricultural Economics and Policy
- Agroforestry and silvopastoral systems
- Genetic and phenotypic traits in livestock
- Bioenergy crop production and management
- Effects of Environmental Stressors on Livestock
- Animal Behavior and Welfare Studies
- Agriculture and Rural Development Research
- Monoclonal and Polyclonal Antibodies Research
- CAR-T cell therapy research
- Science, Research, and Medicine
- Environmental Impact and Sustainability
- Plant Water Relations and Carbon Dynamics
- Veterinary Medicine and Surgery
- Biosimilars and Bioanalytical Methods
- Water Quality Monitoring Technologies
- Sustainable Development and Environmental Policy
- Organic Food and Agriculture
- Sustainable Agricultural Systems Analysis
- Anaerobic Digestion and Biogas Production
University of Tasmania
2014-2025
Tasmanian Institute of Agriculture
2025
The University of Melbourne
2023
University of Delaware
2021-2022
Soil N mineralisation is the process by which organic converted into plant-available forms, while soil immobilisation transformation of inorganic matter and microbial biomass, thereafter becoming bio-unavailable to plants. Mechanistic models can be used explore contribution mineralised or immobilised pasture growth through simulation plant, environment interactions driven management. Our objectives were (1) compare performance three agro-ecosystems (APSIM, DayCent DairyMod) in simulating N,...
The nitrogen (N) nutrition of dairy pasture systems in southern Australia has changed from almost total dependence on legumes the early 1990s through to complete reliance N fertiliser today. Although some tactical is applied sheep and beef pastures boost late winter growth, most usage remains with industry. Intensification farming system, increased stocking rates a greater fertiliser, loading, leading higher potential losses volatilisation, leaching denitrification. With increasing focus...
Abstract While society increasingly demands emissions abatement from the livestock sector, farmers are concurrently being forced to adapt an existential climate crisis. Here, we examine how stacking together multiple systems adaptations impacts on productivity, profitability and greenhouse gas (GHG) of production under future climates underpinned by more frequent extreme weather events. Without adaptation, reveal that soil carbon sequestration (SCS) in 2050 declined 45–133%, heralding dire...
Livestock greenhouse gas (GHG) emissions form the largest proportion of from agriculture. Here we seek intervention strategies for sustainably intensifying productivity prime lamb enterprises without increasing net farm emissions. We apply a biophysical model and an calculator to determine implications several interventions in south-eastern Australia. examine effects liveweight or age at sale, weaning rate, maiden ewe joining age, genetic feed-use efficiency, supplementary grain feeding...
Classical reductionist experimentation tends to conceptually compartmentalise mitigation and adaptation into binary categories, shielding insight how greenhouse gas (GHG) emissions climate change interact. Here, our primary aim was examine a key tenant of the global crisis – drought is likely influence soil organic carbon (SOC). We deconstruct these paradigms using case study farms in Tasmania, Australia, state art models simulate pasture production SOC under historical 2050 climates, latter...
<title>Abstract</title> The broad philosophy comprising regenerative agriculture can be deconstructed into several underpinning components, including adaptive multi-paddock grazing (AMP), improved biodiversity, silvopasture, and minimal use of cultivation synthetic fertilisers. Here, we sheep farms positioned across a rainfall gradient to examine how pasture species diversity, antecedent SOC AMP influence soil organic carbon (SOC) accrual, greenhouse gas (GHG) emissions, production...
Agricultural expansion and intensification has caused habitat loss, contributing to the current biodiversity crisis. Reliable, efficient consistent information at farm-scale is critical understand magnitude of recent changes in inform future management actions aimed reversing historical declines. We apply a habitat-based assessment approach examine potential for grazing farms across Australia improve outcomes by revegetating 10 % farm area. Fourteen case-study distributed with diverse...
Abstract Land managers are challenged with the need to balance priorities in production, greenhouse gas (GHG) abatement, biodiversity and social license operate. Here, we develop a transdisciplinary approach for prioritising land use, illustrated by co-designing pathways transitioning farming systems net-zero emissions. We show that few interventions enhanced productivity profitability while reducing GHG Antimethanogenic feed supplements planting trees afforded greatest mitigation, revenue...
Ruminant livestock are generally considered inefficient converters of dietary nitrogen (N) into animal product. Animal use efficiency (NUE) is a measure the relative transformation feed N product and in dairy systems this often expressed as milk per unit intake (g N/100 g intake). This study was theoretical exercise to explore potential efficacy value proposition breeding versus feeding improve NUE, reduce urinary excretion associated environmental impact pasture-based systems. The...
In the cool temperate dairy regions of Tasmania, there is heavy reliance on irrigation to maximise pasture performance by ensuring that plants do not suffer water stress. Consequently, has often been applied at a greater amount than plant requirements, resulting in low efficiencies. An experiment was undertaken north-western Tasmania between October 2007 and April 2008, examining effect deficit treatments growth water-use efficiency. A rainfall (potential evapotranspiration minus rainfall)...
The Australian dairy industry contributes ~1.6% of the nation’s greenhouse gas (GHG) emissions, emitting an estimated 9.3 million tonnes carbon dioxide equivalents (CO2e) per annum. This study examined 41 contrasting farms for their GHG emissions using Dairy Greenhouse Gas Abatement Strategies calculator, which incorporates Intergovernmental Panel on Climate Change and inventory methodologies, algorithms emission factors. Sources included were pre-farm embedded associated with key farm...
Potential exists to select pasture species better adapted anticipated warmer temperatures and lower rainfall, associated with increasing atmospheric carbon dioxide (CO2) other greenhouse gas concentrations, maximise yields persistence. This study assessed the effect of three plant traits in perennial ryegrass (Lolium perenne L.) adapt future climates: root depth; heat tolerance, defined as ability grow at high temperatures; responsiveness elevated CO2 concentrations. Pasture production was...
There is a growing realization that the complexity of model ensemble studies depends not only on models used but also experience and approach by modelers to calibrate validate results, which remain source uncertainty. Here, we applied multi-criteria decision-making method investigate rationale in study where 12 process-based different biogeochemical types were compared across five successive calibration stages. The shared common level agreement about importance variables initialize their for...
Every year since 1990, the Australian Federal Government has estimated national greenhouse-gas (GHG) emissions to meet Australia’s reporting commitments under United National Framework Convention on Climate Change (UNFCCC). The Greenhouse Gas Inventory (NGGI) methodology used estimate GHG altered over time, as new research data have been improve inventory emission factors and algorithms, with latest change occurring in 2015 for 2013 year. As measuring farm is expensive time-consuming, dairy...
A priori knowledge of seasonal pasture growth rates helps livestock farmers plan with supply and feed budgeting. Longer forecasts may allow managers more lead time, yet inaccurate could to counterproductive decisions foregone income. By using climate generated from historical archives or the global circulation model (GCM) called Predictive Ocean Atmosphere Model for Australia (POAMA), we simulated in a whole-farm compared growth-rate hindcasts (viz. retrospective forecasts). Hindcast were...
Nascent anecdotal evidence implies that livestock feed supplementation with biochar may reduce enteric methane, improve liveweight gains (LWG) and soil carbon through manure enrichment. However, the cost-effectiveness potential adoption of as animal remain unclear, especially when considering its connection to markets social perception. Here, we dissect our hypothesis using an integrated, cross-disciplinary participatory modelling framework, grounded data from farm trials insights expert...