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Farm Management

Paul Sutherland

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Our Land and Water aims to improve the health of freshwater in Aotearoa by providing impartial, robust evidence that supports good farm management. Use the filters below to narrow down our farm management resources to those that are relevant to you.

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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

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

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

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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Presentation

The missing link to better target on-farm practices to address water quality?

Public lecture, Lincoln University, September 2017
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Journal Article

A review of regulations and guidelines related to winter manure application

Winter manure application elevates nutrient losses and impairment of water quality compared to applications in other seasons. We reviewed worldwide mandatory regulations and voluntary guidelines…
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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…
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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…
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Method

A strategy for optimizing catchment management actions to stressor–response relationships in freshwaters

Defining a receiving environment,-value-contaminant system and determining a specific stressor–response relationship for that system provide valuable decision support strategy to optimize management actions toward a…
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Presentation

Land-use effects on aquatic ecosystems – strengthening the evidence base

NZ Freshwater Sciences Conference, December 2018
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Presentation

Genomics: Animal-Plant-Soil Microbiome

This presentation proposes research to test the hypothesis: efficient use of nitrogen in a RG-WC dairy production system is controlled by the composition, activity and…
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Summary

Cathy Taite-Jamieson and BioFarm: Dairy Farming with Nature in the Manawatū

Her organic BioFarm yoghurt is available in most supermarkets in Aotearoa but she only milks around 100 cows. Read more here about the Māori and…
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