Paul L. Mudge
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View article: Comparison of different approaches for estimating profile soil organic carbon stocks from topsoil samples
Comparison of different approaches for estimating profile soil organic carbon stocks from topsoil samples Open
Changes in land use, management, and climate can significantly influence soil organic carbon (SOC) dynamics, prompting domestic and international initiatives to prioritise monitoring, reporting, and verifying SOC stock changes. Based on th…
View article: Design and results from a national soil carbon stock benchmarking and monitoring system for agricultural land in New Zealand
Design and results from a national soil carbon stock benchmarking and monitoring system for agricultural land in New Zealand Open
Despite the importance of soil organic carbon (SOC) stocks and stock changes, few countries are monitoring changes through time with direct soil measurements. National-scale changes of SOC stocks in New Zealand’s mineral soils, reported to…
View article: Reconciling historic and contemporary sampling of soil organic carbon stocks: Does sampling approach create systematic bias?
Reconciling historic and contemporary sampling of soil organic carbon stocks: Does sampling approach create systematic bias? Open
View article: Observed and modelled carbon fluxes at a grazed site with CO2 enrichment
Observed and modelled carbon fluxes at a grazed site with CO2 enrichment Open
New Zealand maintained a free-air CO2 enrichment (FACE) facility from 1997 to 2020, with CO2 concentration enriched by about 100 μmol mol-1. It was unique by including regular sheep grazing. Here, we compar…
View article: Assessing the potential of diverse pastures for reducing nitrogen leaching
Assessing the potential of diverse pastures for reducing nitrogen leaching Open
Mitigation practices for nitrogen leaching losses from livestock agriculture are needed to protect freshwater quality and increase the efficiency of agricultural production. Within New Zealand, the most common pasture type is a two-species…
View article: Comment on ‘An examination of the ability of plantain ( <i>Plantago lanceolata</i> L.) to mitigate nitrogen leaching from pasture systems’
Comment on ‘An examination of the ability of plantain ( <i>Plantago lanceolata</i> L.) to mitigate nitrogen leaching from pasture systems’ Open
In their review: An examination of the ability of plantain (Plantago lanceolata L.) to mitigate nitrogen leaching from pasture systems, Eady et al. (2024) dispute both the historic estimates of typical urine patch nitrogen (N) load and lea…
View article: Evaluation of the potential for nine established and emerging interventions to reduce soil carbon losses and increase stocks in grazing systems: A case study for Aotearoa New Zealand
Evaluation of the potential for nine established and emerging interventions to reduce soil carbon losses and increase stocks in grazing systems: A case study for Aotearoa New Zealand Open
This article reviews nine soil carbon interventions to reduce soil carbon losses or increase stocks in grazing management systems, using their potential application in Aotearoa New Zealand (A‐NZ) as a case study. The interventions are clas…
View article: Effects of dairy farming management practices on carbon balances in New Zealand’s grazed grasslands: Synthesis from 68 site-years
Effects of dairy farming management practices on carbon balances in New Zealand’s grazed grasslands: Synthesis from 68 site-years Open
Globally, the soils underlying managed grasslands are an important reservoir of carbon (C), with the management of the land strongly influencing whether the soils gain, lose or maintain C. Further, improved grassland management, such as ro…
View article: Comparison of Different Approaches for Estimating Profile Soil Organic Carbon Stocks from Topsoil Samples
Comparison of Different Approaches for Estimating Profile Soil Organic Carbon Stocks from Topsoil Samples Open
View article: Corrigendum to “Maize cropping degrades soil hydraulic properties relative to grazed pasture in two contrasting soils” [Geoderma 421(2022) 115912]
Corrigendum to “Maize cropping degrades soil hydraulic properties relative to grazed pasture in two contrasting soils” [Geoderma 421(2022) 115912] Open
View article: Microbial community composition and activity in paired irrigated and non-irrigated pastures in New Zealand
Microbial community composition and activity in paired irrigated and non-irrigated pastures in New Zealand Open
Context Microorganisms are key for carbon (C) and nitrogen (N) cycling in soils supporting agricultural production. Aims We investigated the impacts of irrigation on microbial community structure and activity in New Zealand on 28 paired no…
View article: Priming of carbon decomposition in 27 dairy grazed soils after bovine urine additions
Priming of carbon decomposition in 27 dairy grazed soils after bovine urine additions Open
Context Soil organic matter (SOM) plays a vital role in carbon (C) storage and agricultural sustainability. Additions of bovine urine to soils can cause positive priming of soil C decomposition and represents a pathway for SOM loss. Howeve…
View article: Relationships of plant traits and soil biota to soil functions change as nitrogen fertiliser rates increase in an intensively managed agricultural system
Relationships of plant traits and soil biota to soil functions change as nitrogen fertiliser rates increase in an intensively managed agricultural system Open
Because plant and soil systems are strongly inter‐linked, manipulating plant traits in intensively managed agricultural systems could be used to improve soil functioning and sustainability. However, we have little understanding of whether …
View article: The Land Resource Circle: Supporting land-use decision making with an ecosystem-service-based framework of soil functions
The Land Resource Circle: Supporting land-use decision making with an ecosystem-service-based framework of soil functions Open
Land information has in the past focused on the key land and soil properties that physically or chemically support or limit the use of land. With the increasing focus on the environmental, social, and cultural impacts of land-use decisions…
View article: Trait plasticity of intensive pasture species due to growth in mixture across seasons and nutrient addition levels
Trait plasticity of intensive pasture species due to growth in mixture across seasons and nutrient addition levels Open
Questions How do the traits of pastoral species respond to growth in mixture, nitrogen addition and season? What are the impacts of trait plasticity on community aggregate trait values? Study site A large-scale field experiment on intensiv…
View article: The effect of irrigation on cadmium, uranium, and phosphorus contents in agricultural soils
The effect of irrigation on cadmium, uranium, and phosphorus contents in agricultural soils Open
View article: Combining field experiments and predictive models to assess potential for increased plant diversity to climate‐proof intensive agriculture
Combining field experiments and predictive models to assess potential for increased plant diversity to climate‐proof intensive agriculture Open
Agricultural production systems face increasing threats from more frequent and extreme weather fluctuations associated with global climate change. While there is mounting evidence that increased plant community diversity can reduce the var…
View article: Season and dominant species effects on plant trait‐ecosystem function relationships in intensively grazed grassland
Season and dominant species effects on plant trait‐ecosystem function relationships in intensively grazed grassland Open
Grazed pasture managers are increasingly being asked to enhance productivity while simultaneously reducing environmental impacts. Using plant traits to design plant communities that optimise ecosystem functions (e.g. productivity, nitrogen…
View article: The trade-offs between milk production and soil organic carbon storage in dairy systems under different management and environmental factors
The trade-offs between milk production and soil organic carbon storage in dairy systems under different management and environmental factors Open
A possible agricultural climate change mitigation option is to increase the amount of soil organic carbon (SOC). Conversely, some factors might lead to inadvertent losses of SOC. Here, we explore the effect of various management options an…
View article: Catchment-scale contribution of invasive nitrogen fixing shrubs to nitrate leaching: a scoping study
Catchment-scale contribution of invasive nitrogen fixing shrubs to nitrate leaching: a scoping study Open
Woody nitrogen (N) fixers are known to fix atmospheric N at very high rates. However, N leached from woody N fixers is rarely accounted for in catchment nutrient budgets. We conducted a scoping study to determine the potential impact of th…
View article: Leaf economics spectrum–productivity relationships in intensively grazed pastures depend on dominant species identity
Leaf economics spectrum–productivity relationships in intensively grazed pastures depend on dominant species identity Open
Plant functional traits are thought to drive variation in primary productivity. However, there is a lack of work examining how dominant species identity affects trait–productivity relationships. The productivity of 12 pasture mixtures was …
View article: Changes in soil carbon stocks of New Zealand’s grazed pasture in response to variations in management and environmental factors
Changes in soil carbon stocks of New Zealand’s grazed pasture in response to variations in management and environmental factors Open
Dairy farming is New Zealand‟s pre-eminent primary industry. It achieves large export earnings but is also responsible for a large proportion of the country‟s greenhouse gas emissions. One of those greenhouse gases is CO₂, and in order to …
View article: Modelling carbon and water exchange of a grazed pasture in New Zealand constrained by eddy covariance measurements
Modelling carbon and water exchange of a grazed pasture in New Zealand constrained by eddy covariance measurements Open
We used two years of eddy covariance (EC) measurements collected over an intensively grazed dairy pasture to better understand the key drivers of changes in soil organic carbon stocks. Analysing grazing systems with EC measurements poses s…