A5053242111- Plant nutrient uptake and metabolism
- Legume Nitrogen Fixing Symbiosis
- Soil Carbon and Nitrogen Dynamics
- Pasture and Agricultural Systems
- Plant Micronutrient Interactions and Effects
- Agronomic Practices and Intercropping Systems
- Weed Control and Herbicide Applications
- Agricultural Science and Fertilization
- Mycorrhizal Fungi and Plant Interactions
- Polymer-Based Agricultural Enhancements
- Ruminant Nutrition and Digestive Physiology
- Phytase and its Applications
- Phosphorus and nutrient management
- Soil Management and Crop Yield
- Biological Control of Invasive Species
University of New England
2019-2024
Commonwealth Scientific and Industrial Research Organisation
2019-2020
Health Sciences and Nutrition
2020
Agriculture and Food
2019
Annual grass weeds can provide significant competition to an establishing sown tropical perennial pasture. At least two years of weed control prior sowing is required reduce the seed bank. Pre-emergent herbicides used in summer cereals, such as atrazine or s-metolachlor with metcamifen safener, may this preparation time. Two controlled-environment experiments were conducted assess potential for these pre-emergent be several grasses. Experiment 1 tested effect (400 g L−1 a.i. at 0–2× label...
Trifolium subterraneum L. is widely grown in the phosphorus (P) deficient soils of southern Australia. However, this pasture legume has a high critical external P requirement and requires frequent applications fertiliser to achieve productivity. Twenty-six genotypes T. were determine: (i) differences shoot growth acquisition under low-P supply; (ii) root morphological traits important for acquisition; (iii) feasibility selection among these traits. Micro-swards each genotype with topsoil...
Mycorrhizal fungi are ubiquitous in agroecosystems and form symbiotic associations that contribute to the phosphorus (P) acquisition of many plants. The impact mycorrhizas is most pronounced P-deficient soil commonly involves modifications root morphology colonised However, consequences mycorrhizal colonisation on acclimation responses P stress not well described. Five annual pasture legumes, with differing morphologies, were grown determine effect shoot yield, uptake. Micro-swards each...
ABSTRACT Extensive grazing systems often receive minimal fertiliser due to the risk associated with using relatively expensive inputs. Nevertheless, nutrient applications are known improve pasture productivity, and benefit of applying is being more widely accepted. Two tropical mixes (Digit/Desmanthus Rhodes/Centro) were established in plastic boxes containing phosphorus (P) responsive soil investigate shoot yield P recovery. The grasses legumes planted separate rows, three treatments...
The extensive grazing systems of northern Australia are dominated by C4 grasses and established in N- P-responsive soils that receive minimal nutrient input. Under these conditions, tropical pasture legumes expected to improve the quality forage fix atmospheric N2. However, legume persistence is relatively poor, which may be due a presumed disparity P requirements among species. This suggests P-efficient persistence, yet many remain unquantified. Nine Desmanthus spp. genotypes were grown...
Moderating nutrient release to match plant requirements more closely can improve use efficiency. The formation of lower-solubility ammonium salts may be a simple and cost-effective way slow the nitrogen (N) from fertiliser sources. Several modified mono-ammonium phosphate (MAP) compounds were prepared by adding magnesium silicate regular MAP reconstituting granules. This process results in schertelite that potentially both N soil solution. These include citrate-soluble phosphorus (P) than...
Tropical pasture legumes such as Desmanthus are expected to improve productivity in the extensive grazing systems of Northern Australia. However, soils these areas often hostile (e.g., hard-setting and nutrient-deficient), which reduces legume emergence establishment. Furthermore, not ameliorated with amendments gypsum or starter fertilisers before planting. A pot trial was conducted investigate differences early growth four species. The were grown three alkaline clay that unamended amended...
The root traits of many warm-season pasture species have not been characterised thoroughly. Depending on the nature legume architecture, alternative phosphorus (P) application strategies may improve success establishment and persistence, particularly if legumes exhibit a spatially responsive system. purpose present experiment was to investigate morphology several determine response these subsurface P fertiliser. Monocultures two grasses (Panicum coloratum Digitaria eriantha) (Medicago sativa...