A5080720455- Soil and Water Nutrient Dynamics
- Soil Carbon and Nitrogen Dynamics
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Ruminant Nutrition and Digestive Physiology
- Phosphorus and nutrient management
- Crop Yield and Soil Fertility
- Agroforestry and silvopastoral systems
- Analytical Chemistry and Sensors
- Agriculture and Rural Development Research
- Advanced Chemical Sensor Technologies
- Water Quality Monitoring Technologies
- Rangeland Management and Livestock Ecology
- Ecology and Vegetation Dynamics Studies
- Tree Root and Stability Studies
- Groundwater and Isotope Geochemistry
- Soil and Unsaturated Flow
- Pasture and Agricultural Systems
- Agriculture, Soil, Plant Science
- Plant nutrient uptake and metabolism
- Landslides and related hazards
- Analytical chemistry methods development
- Livestock Management and Performance Improvement
- Peatlands and Wetlands Ecology
- Agricultural Science and Fertilization
Massey University
2016-2025
Macquarie University
2017
University of Tasmania
2001-2011
La Trobe University
2002-2004
CSIRO Publishing
2001-2002
Ellinbank Observatory
2002
Agriculture Victoria
2002
Extended research on the design and development of a smart nitrate sensor for monitoring concentration in surface groundwater are reported this paper. The developed portable sensing system consists planar interdigital sensor, associated electronics, instrumentation, electrochemical impedance spectroscopy based analysis. is capable measuring concentrations range 0.01-0.5 mg/L ground water. This paper extends our earlier work by including temperature compensation capacity within sensor....
Monitoring the nitrate concentration in field is an excellent ability for a water-monitoring study. We report interdigital FR4-based capacitive sensor, which characterized concentration. The range of 0–40 ppm (mg/L). Different unknown samples were measured and validated with standard UV-Spectrometry. A smart sensing node has been developed can collect water from lake, stream, or river, measure instantaneous concentration, transfer data through gateway to user-defined cloud server. system...
Soil phosphorus (P) buffering capacity (PBC) is an important soil property that influences the amount of P fertiliser available for plant uptake. However, current methods determining PBC are time-consuming and uneconomic in most commercial testing programs. The study examined simpler measuring a wide range Australian soils. Phosphorus sorption extractable data from 290 soils (initial set) were collated to define values agricultural Independently, detailed chemical physical analyses...
Unnecessary accumulation of phosphorus (P) in agricultural soils continues to degrade water quality and linked ecosystem services. Managing both soil loss P fertility status is therefore crucial for eutrophication control, but the relative environmental benefits these two mitigation measures, timescales over which they occur, remain unclear. To support policies toward reduced loadings from soils, we examined impact conservation lowering test (STP) different regions with intensive farming...
Ten paired irrigated dairy farms under biodynamic (BD) and conventional (CV) management were compared over a 4-year period (1991–94). The located in the irrigation districts of northern Victoria southern New South Wales matched for soil type, climate, cattle breed farm area. Farms had been practising BD principles an average 16 years before commencement study not received phosphorus (P) fertiliser 17 years. effects on chemical biological properties nutritive botanical composition pasture...
Soil phosphorus (P) sorption is an important and relatively stable soil property which dictates the equilibrium between sorbed solution P. P measures are commonly adjusted for effect of current fertility on amount a sorbs. In case highly fertilised agricultural soils, however, this adjustment likely to be inappropriate as it may mask changes in soil’s capacity sorb P, could affect future fertiliser applications. A study was undertaken compare or unadjusted methods measuring using 9 pasture...
The development of techniques for the rapid, inexpensive and accurate determination phosphorus (P) buffer index (PBI) in soils is important terms increasing efficiency P application optimum crop requirements preventing environmental pollution due to excessive use fertilisers. This paper describes successful implementation partial least-squares regression (PLSR) from spectra obtained with bench-top handheld mid-infrared (MIR) spectrometers prediction PBI on 601 representative Australian...
Silvopastoral systems can be innovative solutions to agricultural environmental degradation, especially in hilly and mountainous regions. A framework that expresses the holistic nature of silvopastoral is required so research directions unbiased informed. This paper presents a novel relates full range known outcomes bio-physical tree attributes, uses it generate priorities for New Zealand hill country case study. Current reviewed compared poplar (Populus spp.), most commonly planted country,...
Access of livestock, such as cattle, to waterways has been shown be a cause poor water quality due pugging damage and excretion entering the water. In New Zealand, regulations require that deer, pigs are excluded from accessing waterways, but there no requirements for sheep. The current study utilised 24 h video cameras, global positioning system units, triaxial accelerometers observe interaction Romney ewes (n = 40) with natural waterway. Ewes were either restricted (week 1) or given access...
Silvopastoral systems have complex impacts on a diverse range of outcomes, making it essential to design these using an integrative approach maximise positive farms. This paper comprises firstly systematic review global silvopastoral processes, and secondly stakeholder-driven synthesis key opportunities challenges for future silvopastoralism situated in the context New Zealand. The demonstrated that although under-researched, livestock interactions can overriding influences system,...
There is a need to be able identify soils with the potential generate high concentrations of phosphorus (P) in runoff, and predict these for modelling risk-assessment purposes. Attempts use agronomic soil tests such as Colwell P purposes have met limited success. In this research, we examined relationships between novel test (diffuse gradients thin films, DGT), P, buffering index (PBI), runoff concentrations. Soils were collected from six sites diverse range properties, incubated 9 months...
This paper showcases the design and development of a portable sensing system that could be used in-situ to detect concentrations nitrate salts present in groundwater. Electrochemical Impedance Spectroscopy was employed identify display by using planar interdigital sensor immersed stream water samples. Calibration samples were prepared serial dilution stock solution laboratory test collected from different surface sources. The evaluated commercial equipment designed system. Although...
Abstract Rice is the primary energy source of more than half global population. Challenges persist in managing phosphorus (P) paddy soils tropical rice-growing countries. In Sri Lanka, one specific challenge inconsistent yield response observed when inorganic P fertilisers are applied to soils. Previous research conducted Lanka has shown that rice added cannot be adequately explained by factors such as soil available P, irrigation schemes, texture, pH, electrical conductivity, total carbon...
Intensive dairy operations in Australia regularly apply P fertiliser to maintain productive pasture species. However, extractable soil test (STP) concentrations this industry commonly exceed those required maximise production, a situation which can increase the risk of loss surrounding waterways. The current study examined relationships between STP (Olsen and CaCl2 P) surface runoff from red silty loam (Ferrosol), used for production south-eastern Australia. Soil was mixed re-packed into...