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Phosphorus

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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.

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Summary

Assessing the Effectiveness of On-Farm Mitigation Actions

This research summary describes how effective on-farm mitigations have been so far, by comparing losses of nitrogen (N), phosphorus (P) and sediment in 1995 and…
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Journal Article

Municipal composts reduce the transfer of Cd from soil to vegetables

Cadmium (Cd) is a non-essential trace element that accumulates in agricultural soils through the application of Cd-rich phosphate fertiliser. Vegetables can accumulate Cd to concentrations…
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Journal Article

The effect of soil moisture extremes on the pathways and forms of phosphorus lost in runoff from two contrasting soil types

Soil moisture and Olsen P concentrations play an important role in phosphorus (P) losses in runoff. Our hypotheses were as follows: (1) rainfall applied to…
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Journal Article

The effect of irrigation and urine application on phosphorus losses to subsurface flow from a stony soil

Factors such as irrigation and soil pH can increase the solubility of P and its loss to water. Urine patches are known to alter pH…
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Journal Article

Estimation of nutrient loads from monthly water quality data

Causes of variation between loads estimated using alternative calculation methods and their repeatability were investigated using 20 years of daily flow and monthly concentration samples…
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Journal Article

Temperature and Nitrogen Effects on Phosphorus Uptake by Agricultural Stream-Bed Sediments

Climate change will likely increase the growing season, temperatures, and ratio of nitrogen (N) to phosphorus (P) loss from land to water. However, it is…
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Journal Article

Balancing water-quality threats from nutrients and production in Australian and NZ dairy farms under low profit margins

We summarise the losses of N and P from Australasian dairy farms, examine the policy drivers used for mitigating losses and evaluate the effectiveness of…
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Journal Article

A review of the policies and implementation of practices to decrease water quality impairment by phosphorus in NZ, the UK, and the US

We outline policy in New Zealand, the UK, and the US who have imposed limits for P. We contrast the strategies used and discuss their…
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Journal Article

Guiding phosphorus stewardship for multiple ecosystems services

We propose a conceptual framework‚ the ‘phosphorus ecosystem services cascade’ (PESC)‚ to integrate the key ecosystem processes and functions that moderate the relationship between P…
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Journal Article

Does variable rate irrigation decrease nutrient leaching losses from grazed dairy farming?

A six‚Äêyear study was conducted to determine whether the use of variable rate irrigation (VRI), compared to uniform rate irrigation (URI), could decrease N and…
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Journal Article

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?

This paper won the JEQ Best Paper Award 2019. Concentration and flow data for 1998 to 2009 were used to calculate catchment load and yields…
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Journal Article

Impacts of long-term biomass management on soil phosphorus under temperate grassland

We assessed and quantified the cumulative impact of 20 years of biomass management on the nature and bioavailability of soil phosphorus (P) accumulated from antecedent…
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