Richard McDowell

Publications

  • Direct exports of phosphorus from fertilizers applied to grazed pastures
  • The biotic contribution to the benthic stream sediment phosphorus buffer
  • The mitigation of phosphorus losses from a water-repellent soil used for grazed dairy farming
  • The Ability to Reduce Soil Legacy Phosphorus at a Country Scale
  • Evidence for the leaching of dissolved organic phosphorus to depth
  • Likely controls on dissolved reactive phosphorus concentrations in baseflow of an agricultural stream
  • Dynamics of phosphorus exchange between sediment and water in a gravel-bed river
  • Role of organic anions and phosphatase enzymes in phosphorus acquisition in the rhizospheres of legumes and grasses grown in a low phosphorus pasture soil
  • Total soil cadmium concentrations in the Winchmore long-term phosphorus fertiliser trial are still increasing
  • Changes in soil cadmium concentrations with time following cessation of phosphorus fertilizer inputs
  • A global perspective on phosphorus management decision support in agriculture: Lessons learned and future directions
  • Phosphorus transport in subsurface flow from a stony soil under irrigated and non-irrigated lucerne
  • Long-term atmospheric carbon dioxide enrichment decreases soil phosphorus availability in a grazed temperate pasture
  • Global mapping of freshwater nutrient enrichment and periphyton growth potential
  • Transforming soil phosphorus fertility management strategies to support the delivery of multiple ecosystem services from agricultural systems
  • A strategy for optimizing catchment management actions to stressor–response relationships in freshwaters
  • The land use suitability concept: Introduction and an application of the concept to inform sustainable productivity within environmental constraints
  • Development of a model using matter element, AHP and GIS techniques to assess the suitability of land for agriculture
  • Impacts of long-term plant biomass management on soil phosphorus under temperate grassland
  • The Environmental Impact of Fertiliser Nutrients on Freshwater
  • Implications of water quality policy on land use: A case study of the approach in New Zealand
  • Estimating and modelling the risk of redox-sensitive phosphorus loss from saturated soils using different soil tests
  • Global database of diffuse riverine nitrogen and phosphorus loads and yields
  • Managing Diffuse Phosphorus at the Source versus at the Sink
  • Temperature and nitrogen effects on phosphorus uptake by agricultural stream-bed sediments
  • Why are median phosphorus concentrations improving in New Zealand streams and rivers?
  • The potential for potassium chloride fertiliser applications to leach cadmium from a grazed pasture soil
  • Does variable rate irrigation decrease nutrient leaching losses from grazed dairy farming?
  • Estimation of Catchment Nutrient Loads in New Zealand Using Monthly Water Quality Monitoring Data
  • Quantifying the Extent of Anthropogenic Eutrophication of Lakes at a National Scale in New Zealand
  • The error in stream sediment phosphorus fractionation and sorption properties effected by drying pretreatments
  • Anthropogenic increases of catchment nitrogen and phosphorus loads in New Zealand
  • Transforming phosphorus use on the island of Ireland: A model for a sustainable system
  • The efficacy of good practice to prevent long-term leaching losses of phosphorus from an irrigated dairy farm
  • Balancing water-quality threats from nutrients and production in Australian and New Zealand dairy farms under low profit margins
  • Effects of lime and organic amendments derived from varied source materials on cadmium uptake by potato
  • A review of regulations and guidelines related to winter manure application
  • Assessing the yield and load of contaminants with stream order: Would policy requiring livestock to be fenced out of high-order streams decrease catchment contaminant loads?
  • The influence of a flood event on the potential sediment control of baseflow phosphorus concentrations in an intensive agricultural catchment
  • Integration of ANP and Fuzzy set techniques for land suitability assessment based on remote sensing and GIS for irrigated maize cultivation
  • Seventy years of data from the world’s longest grazed and irrigated pasture trials
  • National-scale implementation of mandatory freshwater farm plans: a mechanism to deliver water quality improvement in productive catchments in New Zealand?
  • The impact of cattle grazing and treading on soil properties and the transport of phosphorus, sediment and E. coli in surface runoff from grazed pasture
  • Plant Species Rather than Elevated Atmospheric CO2 Impact Rhizosphere Properties and Phosphorus Fractions in a Phosphorus-Deficient Soil
  • Reflecting on the journey of environmental farm planning in New Zealand
  • Microbiome innovations for a sustainable future
  • Land use and water quality
  • Quantifying contaminant losses to water from pastoral landuses in New Zealand II. The effects of some farm mitigation actions over the past two decades
  • Quantifying contaminant losses to water from pastoral land uses in New Zealand III. What could be achieved by 2035?
  • Sediment phosphorus buffering in streams at baseflow: A meta-analysis
  • Minimising phosphorus losses from the soil matrix
  • Bayesian network for point and diffuse source phosphorus transfer from dairy pastures in South Otago, New Zealand
  • Is tillage an effective method to decrease phosphorus loss from phosphorus enriched pastoral soils?
  • A review of the cost-effectiveness and suitability of mitigation strategies to prevent phosphorus loss from dairy farms in New Zealand and Australia
  • Potential phosphorus losses from organic and podzol soils: Prediction and the influence of soil physico-chemical properties and management
  • Optimizing land use for the delivery of catchment ecosystem services
  • Manipulation of fertiliser regimes in phosphorus enriched soils can reduce phosphorus loss to leachate through an increase in pasture and microbial biomass production
  • Using organic phosphorus to sustain pasture productivity: A perspective
  • The effect of irrigation and urine application on phosphorus losses to subsurface flow from a stony soil
  • The effect of soil moisture extremes on the pathways and forms of phosphorus lost in runoff from two contrasting soil types
  • Chemistry, cycling, and potential movement of inorganic phosphorus in soils
  • Cadmium accumulation by forage species used in New Zealand livestock grazing systems
  • Nitrate and phosphorus leaching in New Zealand: A national perspective
  • Transport of phosphorus in an alluvial gravel aquifer
  • Global change pressures on soils from land use and management
  • Managing pollutant inputs from pastoral dairy farming to maintain water quality of a lake in a high-rainfall catchment
  • Contrasting the spatial management of nitrogen and phosphorus for improved water quality: Modelling studies in New Zealand and France
  • Cadmium losses from a New Zealand organic soil
  • Technical note: An assessment of mitagator: A farm-scale tool to estimate and manage the loss of contaminants from land to water
  • Assessment, modelling and management of land use and water quality in the upper Taieri River catchment
  • Effects of cultivation on soil and soil water under different fertiliser regimes
  • The use of alum to decrease phosphorus losses in runoff from grassland soils
  • Integrating legacy soil phosphorus into sustainable nutrient management strategies for future food, bioenergy and water security
  • Municipal composts reduce the transfer of Cd from soil to vegetables
  • Phosphorus dynamics in sediments of a eutrophic lake derived from 31P nuclear magnetic resonance spectroscopy
  • Changes in soil phosphorus availability and potential phosphorus loss following cessation of phosphorus fertiliser inputs
  • Nutrients and eutrophication: Introduction
  • Estimating the mitigation of anthropogenic loss of phosphorus in New Zealand grassland catchments
  • Can the application of rare earth elements improve yield and decrease the uptake of cadmium in ryegrass-dominated pastures?
  • Phosphorus and the Winchmore trials: Review and lessons learnt
  • Selection of a legume to use in a low phosphorus loss pasture
  • Variation in environmentally- and agronomically-significant soil phosphorus concentrations with time since stopping the application of phosphorus fertilisers
  • A review of the policies and implementation of practices to decrease water quality impairment by phosphorus in New Zealand, the UK, and the US
  • Extreme phosphorus losses in drainage from grazed dairy pastures on marginal land
  • A cost-effective management practice to decrease phosphorus loss from dairy farms
  • Speciation and distribution of organic phosphorus in river sediments: a national survey
  • Treatment of pasture topsoil with alum to decrease phosphorus losses in subsurface drainage
  • When experts disagree: the need to rethink indicator selection for assessing sustainability of agriculture
  • The use of alum to decrease phosphorus loss from dairy farm laneways in southern New Zealand
  • Relationship between sediment chemistry, equilibrium phosphorus concentrations, and phosphorus concentrations at baseflow in rivers of the New Zealand National River Water Quality Network
  • Using the provenance of sediment and bioavailable phosphorus to help mitigate water quality impact in an agricultural catchment
  • Natural background and anthropogenic contributions of cadmium to New Zealand soils
  • Establishment of reference or baseline conditions of chemical indicators in New Zealand streams and rivers relative to present conditions
  • A National Assessment of the Potential Linkage between Soil, and Surface and Groundwater Concentrations of Phosphorus
  • MitAgatorTM: A farm scale tool to estimate and mitigate the loss of contaminants from land to water
  • Water: Water Quality and Challenges from Agriculture
  • Bibliography of research from the winchmore irrigation research station, canterbury, New Zealand: 1951 to 2011
  • Can phosphorus fertilizers sparingly soluble in water decrease phosphorus leaching loss from an acid peat soil?
  • Biogeochemical cycles and biodiversity as key drivers of ecosystem services provided by soils
  • Guiding phosphorus stewardship for multiple ecosystem services
  • Reply
  • Water quality and the effects of different pastoral animals
  • Assessment of a technique to remove phosphorus from streamflow
  • Phosphorus in pasture plants: Potential implications for phosphorus loss in surface runoff
  • Modelling to analyse the impacts of animal treading effects on soil infiltration
  • Evaluation of two management options to improve the water quality of Lake Brunner, New Zealand
  • Organic phosphorus speciation and pedogenesis: Analysis by solution 31P nuclear magnetic resonance spectroscopy
  • Land Application of manure can influence earthworm activity and soil phosphorus distribution
  • Is mechanical soil aeration a strategy to alleviate soil compaction and decrease phosphorus and suspended sediment losses from irrigated and rain-fed cattle-grazed pastures?
  • Irrigation and soil physical quality: An investigation at a long-term irrigation site
  • Efficiency of phosphorus cycling in different grassland systems
  • Hydrological approaches to the delineation of critical-source areas of runoff
  • Potential waterway contamination associated with wintering deer on pastures and forage crops
  • Water quality of a stream recently fenced-off from deer
  • Erratum: Phosphorus in humped and hollowed soils of the Inchbonnie catchment, West Coast, New Zealand: II. accounting for losses by different pathways (New Zealand Journal of Agricultural Research (2008) 51 (307-316)).
  • Preface
  • Phosphorus in humped and hollowed soils of the Inchbonnie catchment, West Coast, New Zealand: II. Accounting for losses by different pathways
  • Phosphorus in humped and hollowed soils of the Inchbonnie catchment, West Coast, New Zealand: I. Variation with age and distribution
  • Environmental impacts of pasture-based farming
  • Evaluation of base solutions to determine equilibrium phosphorus concentrations (EPC0) in stream sediments
  • The use of safe wallows to improve water quality in deer farmed catchments
  • Nutrient management in New Zealand pastures— recent developments and future issues
  • The winchmore trials
  • A comparison of phosphorus speciation and potential bioavailability in feed and feces of different dairy herds using 31P nuclear magnetic resonance spectroscopy
  • State and potential management to improve water quality in an agricultural catchment relative to a natural baseline
  • Management options to decrease phosphorus and sediment losses from irrigated cropland grazed by cattle and sheep
  • Nitrogen and phosphorus in New Zealand streams and rivers: Control and impact of eutrophication and the influence of land management
  • Identifying critical source areas for water quality: 2. Validating the approach for phosphorus and sediment losses in grazed headwater catchments
  • Phosphorus fertilizer form affects phosphorus loss to waterways: A paired catchment study
  • Potential phosphorus and sediment loads from sources within a dairy farmed catchment
  • Identifying and linking source areas of flow and P transport in dairy-grazed headwater catchments, North Island, New Zealand
  • Predicting the changes in environmentally and agronomically significant phosphorus forms following the cessation of phosphorus fertilizer applications to grassland
  • Do aggregation, treading, and dung deposition affect phosphorus and suspended sediment losses in surface runoff?
  • Identifying critical source areas for water quality: 1. Mapping and validating transport areas in three headwater catchments in Otago, New Zealand
  • Is cadmium loss in surface runoff significant for soil and surface water quality: A study of flood-irrigated pastures?
  • An examination of potential extraction methods to assess plant-available organic phosphorus in soil
  • Treatment of drainage water with industrial by-products to prevent phosphorus loss from tile-drained land
  • Effects of cattle, sheep and deer grazing on soil physical quality and losses of phosphorus and suspended sediment losses in surface runoff
  • Nutrient losses associated with irrigation, intensification and management of land use: A study of large scale irrigation in North Otago, New Zealand
  • Influence of aggregate size on phosphorus changes in a soil cultivated intermittently: Analysis by 31P nuclear magnetic resonance
  • The rate of accumulation of cadmium and uranium in a long-term grazed pasture: Implications for soil quality
  • Managing agricultural phosphorus for water quality protection: Principles for progress
  • Soil controls of phosphorus in runoff: Management barriers and opportunities
  • Dissolved Organic Matter. Biogeochemistry, Dynamics, and Environmental Significance in Soils.
  • The fate of phosphorus under contrasting border-check irrigation regimes
  • Effect of land use and moisture on phosphorus forms in upland stream beds in South Otago, New Zealand
  • Approaches for quantifying and managing diffuse phosphorus exports at the farm/small catchment scale
  • Phosphorus source areas in a dairy catchment in Otago, New Zealand
  • Atmospheric deposition contributes little nutrient and sediment to stream flow from an agricultural watershed
  • Maintaining good water and soil quality in catchments containing deer farms
  • Contaminant losses in overland flow from cattle, deer and sheep dung
  • Phosphorus in fresh and dry dung of grazing dairy cattle, deer, and sheep: Sequential fraction and phosphorus-31 nuclear magnetic resonance analyses
  • Uptake and release of phosphorus from overland flow in a stream environment
  • Sources of phosphorus lost from a grazed pasture receiving simulated rainfall
  • Effects of deer grazing and fence-line pacing on water and soil quality
  • The effectiveness of industrial by-products to stop phosphorous loss from a Pallic soil
  • Variation of phosphorus leached from Pennsylvanian soils amended with manures, composts or inorganic fertilizer
  • Influence of long-term irrigation on the distribution and availability of soil phosphorus under permanent pasture
  • Phosphorus
  • The effects of soil carbon on phosphorus and sediment loss from soil trays by overland flow
  • Effect of plot scale and an upslope phosphorus source on phosphorus loss in overland flow
  • Particulate phosphorus transport within stream flow of an agricultural catchment
  • Erratum: Modeling phosphorous transport in agricultural watersheds: Processes and possibilities (Journal of Soil and Water Conservation 57:6 (425-439))
  • Analysis of phosphorus in sequentially extracted grassland soil using solid state NMR
  • Analysis of potentially mobile phosphorus in arable soils using solid state nuclear magnetic resonance
  • Amounts, forms, and solubility of phosphorus in soils receiving manure
  • Modelling phosphorus losses from pastoral farming systems in New Zealand
  • Selecting curve numbers for predicting storm flow in Otago catchments
  • Estimating phosphorus loss from New Zealand grassland soils
  • Soil phosphorus concentrations to minimise potential p loss to surface waters in Southland
  • Potential phosphorus losses in overland flow from pastoral soils receiving long-term applications of either superphosphate or reactive phosphate rock
  • Using soil phosphorus profile data to assess phosphorus leaching potential in manured soils
  • Phosphorus and sediment loss in a catchment with winter forage grazing of cropland by dairy cattle
  • Soil aggregate dynamics, particulate organic matter and phosphate under dryland and irrigated pasture
  • Availability of residual phosphorus in high phosphorus soils
  • Chemical nature and diversity of phosphorus in New Zealand pasture soils using 31P nuclear magnetic resonance spectroscopy and sequential fractionation
  • Effects of shelter belts on fence-line pacing of deer and associated impacts on water and soil quality
  • Comments on "amounts, forms, and solubility of phosphorus in soils receiving manure"
  • Nutrient, sediment, and bacterial losses in overland flow from pasture and cropping soils following cattle dung deposition
  • Phosphorus movement and speciation in a sandy soil profile after long-term animal manure applications
  • Peak assignments for phosphorus-31 nuclear magnetic resonance spectroscopy in pH range 5-13 and their application in environmental samples
  • Restricting the grazing time of cattle to decrease phosphorus, sediment and E. coli losses in overland low from cropland
  • Connecting phosphorus loss from agricultural landscapes to surface water quality
  • Sediment phosphorous chemistry and microbial biomass along a lowland New Zealand stream
  • Modification of phosphorus export from an eastern USA catchment by fluvial sediment and phosphorus inputs
  • The effectiveness of coal fly-ash to decrease phosphorus loss from grassland soils
  • Sources of sediment and phosphorus in stream flow of a highly productive dairy farmed catchment
  • An improved technique for the determination of organic phosphorus in sediments and soils by 31P nuclear magnetic resonance spectroscopy
  • The phosphorus composition of contrasting soils in pastoral, native and forest management in Otago, New Zealand: Sequential extraction and 31P NMR
  • Solid-state Fourier transform infrared and 31P nuclear magnetic resonance spectral features of phosphate compounds
  • Identification of phosphorus species in extracts of soils with contrasting management histories
  • Assessing the bioavailability of dissolved organic phosphorus in pasture and cultivated soils treated with different rates of nitrogen fertiliser
  • Mechanisms of phosphorus solubilisation in a limed soil as a function of pH
  • An examination of spin-lattice relaxation times for analysis of soil and manure extracts by liquid state phosphorus-31 nuclear magnetic resonance spectroscopy
  • Phosphorus solubility and release kinetics as a function of soil test P concentration
  • Influence of aggregate size on phosphorus loss and ryegrass yield in a soil cultivated intermittently
  • Indicator to predict the movement of phosphorus from soil to subsurface flow
  • Water quality in headwater catchments with deer wallows
  • Cattle treading and phosphorus and sediment loss in overland flow from grazed cropland
  • Influence of soil treading on sediment and phosphorus losses in overland flow
  • Phosphorus export from an agricultural watershed: Linking source and transport mechanisms
  • Influence of soil constituents on soil phosphorus sorption and desorption
  • The potential for phosphorus loss in relation to nitrogen fertiliser application and cultivation
  • Phosphorus transport in overland flow in response to position of manure application
  • Dissipation of imazapyr, flumetsulam and thifensulfuron in soil
  • Assessing site vulnerability to phosphorus loss in an agricultural watershed
  • Comparing phosphorus management strategies at a watershed scale
  • Approximating phosphorus release from soils to surface runoff and subsurface drainage
  • Integrating phosphorus and nitrogen decision management at watershed scales
  • Modeling phosphorus transport in agricultural watersheds: Processes and possibilities
  • A comparison of fluvial sediment phosphorus (P) chemistry in relation to location and potential to influence stream P concentrations
  • Chemical nature and potential mobility of phosphorus in fertilized grassland soils
  • Innovative management of agricultural phosphorus to protect soil and water resources
  • Relationship between soil test phosphorus and phosphorus release to solution
  • Phosphorus loss from land to water: Integrating agricultural and environmental management
  • Land use and flow regime effects on phosphorus chemical dynamics in the fluvial sediment of the Winooski River, Vermont
  • Processes controlling soil phosphorus release to runoff and implications for agricultural management
  • Phosphorus losses in subsurface flow before and after manure application to intensively farmed land
  • Soil phosphorus quantity-intensity relationships to predict increased soil phosphorus loss to overland and subsurface flow
  • Variation of phosphorus loss from a small Catchment in South Devon, UK
  • Soil phosphorus fractions in solution: Influence of fertiliser and manure, filtration and method of determination
  • The effect of soil acidity on potentially mobile phosphorus in a grassland soil
  • The use of isotopic exchange kinetics to assess phosphorus availability in overland flow and subsurface drainage waters
  • The effect of antecedent moisture conditions on sediment and phosphorus loss during overland flow: Mahantango Creek catchment, Pennsylvania, USA
  • Phosphorus Export from an Agricultural Watershed
  • Phosphorus Transport in Overland Flow in Response to Position of Manure Application

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Co-workers & collaborators

Zachary Simpson

Zachary Simpson

Luke Mosley

Luke Mosley

Richard McDowell's public data