P. M. Haygarth
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View article: Achieving agricultural and environmental targets in a changing climate requires a whole-system based approach
Achieving agricultural and environmental targets in a changing climate requires a whole-system based approach Open
Feeding the large future population is associated with severe environmental challenges to which climate change is adding further complications and stress to the global food supply system. The strategies to the challenges posed on ecosystem…
View article: Towards a sustainable phosphorus network in Africa
Towards a sustainable phosphorus network in Africa Open
Global collaborative action for sustainable management of phosphorus is vital to ensure food production and the protection of water quality. This requires balancing competing phosphorus demands and a growing population through coordinated …
View article: A new approach for identifying catchment typologies based on phosphorus impact risks
A new approach for identifying catchment typologies based on phosphorus impact risks Open
Phosphorus (P) transfer indices (Mobilisation index and Delivery index) were recently introduced to facilitate a standardized, systematic and objective method to evaluate P transfer and impact risks at the catchment scale. The method was d…
View article: A conceptual model for dissolved P mobilization from legacy sources
A conceptual model for dissolved P mobilization from legacy sources Open
Excessive phosphorus (P) concentrations can lead to conditions that limit the amenity of freshwater resources. This problem is particularly acute in agricultural catchments, where P fertilizer and manure amendments have been used to increa…
View article: Soil phosphorus stocks could prolong global reserves and improve water quality
Soil phosphorus stocks could prolong global reserves and improve water quality Open
Combining existing databases, we estimated global phosphorus stocks in croplands and grasslands that are not readily available to plants as 32–41% of the 2020 estimated geologic phosphorus reserves, representing 146–186 years of the 2020 m…
View article: Toward a transdisciplinary and unifying definition of legacy phosphorus
Toward a transdisciplinary and unifying definition of legacy phosphorus Open
Legacy phosphorus (P) is a concept advanced by Dr. Andrew Sharpley and colleagues that was originally applied to the persistence of anthropogenic signatures in watersheds, and it has since been adopted in a diversity of settings to help gu…
View article: Reducing phosphorus losses from agricultural land to surface water
Reducing phosphorus losses from agricultural land to surface water Open
Phosphorus (P) enrichment of water impairs its quality by stimulating algal growth and eutrophication, affecting an estimated 1.7 billion people. Remediation costs are substantial, estimated at $1 billion annually in Europe and $2.4 billio…
View article: Missing phosphorus legacy of the Anthropocene: Quantifying residual phosphorus in the biosphere
Missing phosphorus legacy of the Anthropocene: Quantifying residual phosphorus in the biosphere Open
A defining feature of the Anthropocene is the distortion of the biosphere phosphorus (P) cycle. A relatively sudden acceleration of input fluxes without a concomitant increase in output fluxes has led to net accumulation of P in the terres…
View article: A meta-analysis of global soybean plant growth and yield improvement in response to phosphorus addition
A meta-analysis of global soybean plant growth and yield improvement in response to phosphorus addition Open
Application of phosphorus (P) fertiliser to soybean accounts for a large proportion of the global consumption of P as an agricultural fertiliser. Despite this key a knowledge gap exists surrounding the mechanisms of P fertiliser uptake and…
View article: Differential structure and function of phosphorus‐mineralizing microbial communities in organic and upper mineral soil horizons across a temperate rainforest chronosequence
Differential structure and function of phosphorus‐mineralizing microbial communities in organic and upper mineral soil horizons across a temperate rainforest chronosequence Open
Microbial community structure and function were assessed in the organic and upper mineral soil across a ~4000‐year dune‐based chronosequence at Big Bay, New Zealand, where total P declined and the proportional contribution of organic soil …
View article: A review of the development and implementation of the critical source area concept: A reflection of Andrew Sharpley's role in improving water quality
A review of the development and implementation of the critical source area concept: A reflection of Andrew Sharpley's role in improving water quality Open
Critical source areas (CSAs) are small areas of a field, farm, or catchment that account for most contaminant loss by having both a high contaminant availability and transport potential. Most work on CSAs has focused on phosphorus (P), lar…
View article: The riparian reactive interface: a climate-sensitive gatekeeper of global nutrient cycles
The riparian reactive interface: a climate-sensitive gatekeeper of global nutrient cycles Open
Riparian zones are critical interfaces to freshwater systems, acting as gateways for the conveyance and modification of macronutrient fluxes from land to rivers and oceans. In this paper, we propose that certain riparian conditions and pro…
View article: Can we account for the “missing” phosphorus in simulated low phosphorus agricultural systems?
Can we account for the “missing” phosphorus in simulated low phosphorus agricultural systems? Open
Long term total phosphorus (P) concentration, inorganic P and / or organic P concentration in agricultural soils is not commonly measured. As a consequence, computer-based models, that have been developed to predict P responses to changing…
View article: Grazing and topography control nutrient pools in low Arctic soils of Southwest Greenland
Grazing and topography control nutrient pools in low Arctic soils of Southwest Greenland Open
Soil nutrient pools in the dry low Arctic are likely to be released under climatic change and this bioavailability has the potential to increase both terrestrial and aquatic productions. As well as the direct effect of warming, external di…
View article: A meta-analysis of phosphatase activity in agricultural settings in response to phosphorus deficiency
A meta-analysis of phosphatase activity in agricultural settings in response to phosphorus deficiency Open
Phosphorus (P) is a key limiting factor in crop growth and essential for agriculture. As plant uptake of P is inefficient, it is commonly applied to maintain crop yields leading to a range of negative environmental issues when applied in e…
View article: On pedagogy of a Soil Science Centre for Doctoral Training
On pedagogy of a Soil Science Centre for Doctoral Training Open
Here we describe and evaluate the success of a multi‐institutional Centre for Doctoral Training (CDT), which was established to address a UK skills shortage in Soil Science. The government‐funded ‘STARS’ (Soils Training And Research Studen…
View article: Soil phosphorus over a period of agricultural change in Scotland
Soil phosphorus over a period of agricultural change in Scotland Open
Yield increases by use of phosphorus (P) fertiliser has been a defining aspect of last century's agriculture, but in many countries P inputs are now being regulated to avoid ecological damage and improve agricultural sustainability. We tes…
View article: Towards circular phosphorus: The need of inter- and transdisciplinary research to close the broken cycle
Towards circular phosphorus: The need of inter- and transdisciplinary research to close the broken cycle Open
Phosphorus (P) is an essential element to all living beings but also a finite resource. P-related problems center around broken P cycles from local to global scales. This paper presents outcomes from the 9th International Phosphorus Worksh…
View article: Cycling of reduced phosphorus compounds in soil and potential impacts of climate change
Cycling of reduced phosphorus compounds in soil and potential impacts of climate change Open
Soil phosphorus (P) remains an ever‐increasing topic of importance, notably for its key role as a nutrient for driving food production but with parallel concerns over damaging water quality, all against a backdrop of uncertainty of long‐te…
View article: Soil phosphorus, biology and time: A case for publishing inconclusive data, and the undeniable relevance of tennis balls
Soil phosphorus, biology and time: A case for publishing inconclusive data, and the undeniable relevance of tennis balls Open
<p>The association of microorganisms and soil nutrient cycles has been observed for over 200 years, and their importance in the soil phosphorus (P) cycle is well documented. In-soil trophic interactions between bacteria and bacterivo…
View article: Soils training and research: Who's legacy?
Soils training and research: Who's legacy? Open
<p>Soils Training and Research Studentships (STARS) is a NERC and BBSRC funded Centre for Doctoral Training (CDT).&#160; The consortium comprises of four universities and four research institutes from around England, Scotland and…
View article: Is the solubility of inorganic and organically complexed phosphorus in agricultural soils affected by chemical fertilizer and organic carbon additions?
Is the solubility of inorganic and organically complexed phosphorus in agricultural soils affected by chemical fertilizer and organic carbon additions? Open
<p>Understanding how the solubility of forms of inorganic and organically-complexed phosphorus (P) in agricultural soil is affected by inputs of organic matter (OM) could inform decisions on sustainable future farming practices. Diff…
View article: Time to re-think agricultural phosphorus modelling for the 2020s &#160;
Time to re-think agricultural phosphorus modelling for the 2020s   Open
<div> <p>Phosphorus (P) is critical to our food production systems with many crop systems dependent on continual inputs to meet yield demands. However, a consequence of the widespread application of P to agricultural soils in t…
View article: Integrated carbon-nitrogen-phosphorus cycling for sustainable agriculture &#8211; a knowledge gap and investigation of the role of phosphatase enzymes
Integrated carbon-nitrogen-phosphorus cycling for sustainable agriculture – a knowledge gap and investigation of the role of phosphatase enzymes Open
<p>Phosphorus is closely linked to other nutrient cycles, notably carbon and nitrogen, therefore, to understand potential risks to food production models are required that simulate integrated nutrient cycling over long timescales. Th…
View article: Time to wake up to climate change and the accelerating phosphorus cycle
Time to wake up to climate change and the accelerating phosphorus cycle Open
<p>We urgently need to wake up to the role that climate change will be playing in the phosphorus cycle.&#160; The paper will attempt to address the complexities, controversies and uncertainties of estimating the effects that clim…