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August 30, 2024
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.
Showing 1 - 12 of 31 results
Technical Report
Evaluation of geospatial datasets and recognition of landscape gradients specific to water quality
This study evaluates the landscape relationships and suitability of existing geospatial datasets for the purposes of mapping physiographic water quality units for the Northland region.…
Technical Report
Evaluation of the physiographic method for the Tasman Region
The work undertaken in this project provides Tasman District Council with a foundation for which the physiographic approach can be applied within the region. The…
Technical Report
Advice for application of the physiographic method to the West Coast Region
Land and Water Science Ltd. was contracted to provide services to West Coast Regional Council through an Envirolink Small Advice Grant. The aim of the…
Guidance
Towards a Physiographic Map: Information for Regional Councils
Physiographic Environments of New Zealand research is developing a cost-effective technique to measure and map (as an integrated physiographic layer) how features of the natural…
Technical Report
Application of Physiographic Science to the Northland Region: Preliminary Hydrological and Redox Process-Attribute Layers
Water quality outcomes can vary spatially across the landscape, even when there are similar land use pressures. These differences are often the result of natural…
Summary
Nitrogen and phosphorus modelled in freshwater eutrophication: The director’s cut
Most Life Cycle Impact Assessment (LCIA) methods to date estimate freshwater eutrophication impacts from phosphorus (P) only. There is a need to account for the…
Journal Article
Managing diffuse phosphorus at the source versus at the sink
Judicious phosphorus (P) management is a global grand challenge and critical to achieving water quality objectives while maintaining food production. The management of point sources…
Journal Article
The error in stream sediment phosphorus fractionation and sorption properties effected by drying pretreatments
We found that drying sediment significantly influenced EPC0 and P fractions (especially the NH4Cl-P fraction). Air-drying was particularly error-prone and should be avoided. The use…
Presentation
Science to policy and back again: compliant land use practices still cause P leaching
NZ Freshwater Sciences Conference – December 2018
Journal Article
Transforming soil phosphorus fertility management strategies to support the delivery of multiple ecosystem services from agricultural systems
Despite greater emphasis on holistic phosphorus (P) management, current nutrient advice delivered at farm-scale still focuses almost exclusively on agricultural production. This limits our ability…
Journal Article
Why are median phosphorus concentrations improving in New Zealand streams and rivers?
Between 2004 and 2013 phosphorus concentrations decreased at 65% of the 304 sites monitored. Our research found the most probable causes of improvement were that…
Journal Article
The efficacy of good practice to prevent long-term leaching losses of phosphorus from an irrigated dairy farm
We measured P fractions in leachate at 70cm depth from two soils of low-P sorption capacity in an intensively grazed dairy farm. In response to…