A5090724540- Soil Carbon and Nitrogen Dynamics
- Legume Nitrogen Fixing Symbiosis
- Plant nutrient uptake and metabolism
- Agronomic Practices and Intercropping Systems
- Pasture and Agricultural Systems
- Mycorrhizal Fungi and Plant Interactions
- Soil and Water Nutrient Dynamics
- Soil Management and Crop Yield
- Ruminant Nutrition and Digestive Physiology
- Plant Micronutrient Interactions and Effects
- Ecology and Vegetation Dynamics Studies
- Soil Geostatistics and Mapping
- Plant Parasitism and Resistance
- Crop Yield and Soil Fertility
- Bioenergy crop production and management
- Soil and Unsaturated Flow
- Growth and nutrition in plants
- Rice Cultivation and Yield Improvement
- Cooperative Studies and Economics
- Irrigation Practices and Water Management
- Seed Germination and Physiology
- Soybean genetics and cultivation
- Turfgrass Adaptation and Management
- Phosphorus and nutrient management
- Plant and animal studies
Commonwealth Scientific and Industrial Research Organisation
2015-2024
Agriculture and Food
2018-2024
Health Sciences and Nutrition
2017-2021
University of New England
2012-2014
Plant Industry
2009-2013
The University of Western Australia
2010-2013
Root hairs are a key trait for improving the acquisition of phosphorus (P) by plants. However, it is not known whether root provide significant advantage plant growth under combined soil stresses, particularly conditions that to restrict hair initiation or elongation (e.g. compacted high-strength soils). To investigate this, and P uptake genotypes barley, Hordeum vulgare L. (i.e. with without hairs), were assessed combinations deficiency high strength. Genotypes found have an penetration...
It is unclear whether roots of acid-soil resistant plants have significant advantages, compared with sensitive genotypes, when growing in high-strength, acid soils or where macropores may allow the effects soil acidity and strength to be avoided. The responses root growth morphology acidity, by seedlings five perennial grass genotypes differing resistance were determined, interaction for was investigated. Soil altered length architecture, hair development, deformed tip, especially genotypes....
Annual pasture legume species can vary more than 3-fold in their critical external phosphorus (P) requirement (i.e. P required for 90% of maximum yield). In this work we investigated the link between root morphology, acquisition and among species. The morphology acclimation five annual legumes one grass to low soil availability was assessed a controlled-environment study. (Dactylis glomerata L., Ornithopus compressus sativus Brot.), intermediate (Biserrula pelecinus Trifolium hirtum All.) or...
Abstract Temperate pasture legumes (e.g . Trifolium and Medicago spp.) often have a higher phosphorus (P) requirement for maximum productivity than grasses. This is partly attributed to differences between grasses in their ability acquire P from soil. We are the first report root morphology traits important soil acquisition range of novel being developed use temperate pastures southern Australia. Up 3·6‐fold specific length (SRL) (79–281 m g −1 root) 6·1‐fold hair (RHL) (0·12–0·75 mm) was...
Context Improving the stability of legumes in grasslands face variable seasonal conditions is key to mitigating risks posed by drought. Aims We assessed persistence a range legume species and cultivars order inform choice for pasture improvement identify priority further development. Methods Twenty field experiments four series were conducted at sites with contrasting soil characteristics ‘high-rainfall’ (560–920 mm long-term average) Tablelands Monaro regions New South Wales, Australia....
In recent decades several pasture legumes have been available in southern Australia as potential alternatives to the most widely used annual legume Trifolium subterraneum. Little is known about their soil phosphorus (P) requirements, but controlled environment experiments indicate that at least some may differ P fertiliser requirements. this study, varieties, including T. subterraneum reference species, were grown up four sites any one year over a 3-year period (in total, seven site ×...
Nutrient-use efficiency is a key issue for grazing systems in Australia. Spatial variability soil pH and nutrients at the sub-paddock scale may affect of utilisation of, provide an opportunity for, site-specific management (SSM) fertiliser ameliorants. However, there has been little research exploring potential SSM systems. This study examines spatial test pH, phosphorus (P), potassium (K) sulfur (S) two typical pasture fields (a native improved) on Northern Tablelands New South Wales...
This review examines the prospect of improving perennial legume adaptation to grazed mixed pasture swards across higher-altitude regions south-eastern Australia through improved management, particularly as it relates soil fertility. The range adapted species available farmers often remains limited only one forage species, white clover (Trifolium repens L.). Despite recent advances in cultivars for increased persistence dryland environments, sensitive drought with its inherently shallow root...
The mainstream pasture legume species such as Trifolium subterraneum, T. repens and annual Medicago spp. used in the temperate systems of southern Australia have high critical external requirements for phosphorus (P) (i.e. P required to achieve 90% maximum yield). This work aimed identify alternative that could be with lower input. Shoot root biomass 12 was measured response seven rates applied top 48 mm soil a pot experiment. Most had yields similar but some only one-third this. requirement...
The hydrological characteristics of biological soil crusts (BSCs) are not well understood. In particular the relationship between runoff and BSC surfaces at relatively large (>1 m2) scales is ambiguous. Further, there a dearth information on small scale (mm to cm) characterization crust types which severely limits any interpretation trends larger scales. Site differences broad classifications BSCs as one surface type rather than into functional form exacerbate problem. This study examines,...