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November 02, 2023
Resources related to
Phosphorus
Adding phosphorus to soil can help grow plants – but too much in our water contributes to algal blooms. These resources can improve your understanding of how phosphorus moves from land to water, and help you find effective ways to minimise phosphorus loss.
Journal Article
Sediment phosphorus buffering in streams at baseflow: A meta-analysis
Phosphorus (P) pollution of surface waters remains a challenge for protecting and improving water quality. Central to the challenge is understanding what regulates P concentrations…
Journal Article
Estimating and modelling the risk of redox-sensitive phosphorus loss from saturated soils using different soil tests
Phosphorus (P) loss from agricultural soils can negatively affect water quality. Models and management to decrease losses increasingly focus on P that is available and…
Journal Article
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
Contaminant loss from grazed pasture can negatively affect freshwater quality. There is, however, little data on the impact of different levels of grazing/treading on contaminant…
Journal Article
Quantifying contaminant losses to water from pastoral land uses in NZ I: Development of a spatial framework for assessing losses at a farm scale
Assessing the effectiveness of mitigation measures for reducing contaminant losses to water from pastoral farming systems is a challenging task. Two important factors that contribute…
Journal Article
Reductive dissolution of phosphorus associated with iron oxides during saturation in an agricultural soil profile
In soils with a fragipan or poor permeability, water may remain in a soil profile long enough to make it anoxic and reductive. The reductive…
Journal Article
Potential phosphorus losses from grassland soils irrigated with dairy factory wastewater
Applying phosphorus (P)-rich wastewater to land can significantly enrich P in topsoil and consequently increase the risk of P losses in surface runoff and leaching.…
Journal Article
Do soil cadmium concentrations decline after phosphate fertilizer application is stopped: A comparison of long-term pasture trials in NZ
Stopping phosphorus (P) fertiliser can decrease topsoil cadmium (Cd) concentrations. Stopping P fertiliser applications reduced soil Cd concentrations after 21 and 26 years. Reductions only…
Journal Article
Amending soils of different pH to decrease phosphorus losses
In most cases the application of Al, Fe and Ca amendments decreased WEP in proportion to the rates applied. However, poor performance was noted when…
Journal Article
Assessing the leaching of cadmium in an irrigated and grazed pasture soil
To decrease topsoil cadmium (Cd) concentrations we need to make inputs < outputs. Phosphorus fertiliser is the main input of Cd and leaching the main…
Presentation
A Source-to-sink Contaminant Risk Framework To Support Water Quality Policy Across Scales
In the wrong place, or at excessive concentrations, nutrients (nitrogen and phosphorus) and sediment become contaminants. Along with pathogens, they require reduction to improve water…
Journal Article
The potential for phosphorus loss to groundwater from soils irrigated with dairy factory wastewater
Soils irrigated with phosphorus (P)-rich wastewater can increase the risk of P losses from land to water. We investigated if wastewater-irrigated soils can leach P…
Presentation
Mitigation action prioritisation & resource tool for freshwater farm plans
Freshwater farm plans will soon be compulsory for all pastoral farms larger than 20 hectares as part of the Government’s Action for Healthy Waterways reforms.…