Increasing the Effectiveness and Adoption of Agricultural Phosphorus Management Strategies to Minimize Water Quality Impairment

Osmond, Deanna L.; Shober, Amy L.; Sharpley, Andrew N.; Duncan, Emily W.; Hoag, Dana L.

doi:10.2134/jeq2019.03.0114

Cited by 37 publications

(26 citation statements)

References 110 publications

(186 reference statements)

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“…Some discussion has occurred regarding the possibility of using economic instruments such as a “P tax” to discourage excess application of P fertilizer, but this ignores the inelasticity of P fertilizer rates in response to fertilizer price changes (Osmond et al, 2019). It has also been shown to have minimal impact on P applications in manure (Mackenzie et al, 2017).…”

Section: Options For Mitigating Phosphorus Imbalancesmentioning

confidence: 99%

Addressing Imbalances in Phosphorus Accumulation in Canadian Agricultural Soils

2019

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Adequate phosphorus (P) is needed for crop production, but excessive P poses a potential risk to water quality. Results from the cumulative P balance calculations within the indicator of risk of water contamination by phosphorus (IROWC‐P) developed in Canada were assessed to determine the spatial and temporal trends in P accumulation at a regional scale and to consider the implications of these trends. Regional cumulative P balances were calculated from census data as a proxy for soil test P (STP) values, including the contribution of fertilizer or manure P to these balances. Ideally, over time we would see a convergence of soil test values at the low end of the critical response range for crop growth, where agronomic and environmental considerations are balanced, but this does not appear to be the case for many regions in Canada. Nationally, about 61% of agricultural land was predicted to be low in STP, and over half of this land is failing to replace the P that is removed each year. While only about 10% of the agricultural land has accumulated significantly more P than is needed for crop growth, almost all of this land is continuing to accumulate P rather than drawing it down. Manure is the dominant P source for continuing accumulation in regions with high or very high estimated STP; reducing this input will be difficult because of the nature of manure and the investment in buildings and infrastructure tied to specific locations, but it is clear that current Canadian policies need strengthened. Core Ideas Neither deficiency nor excess of P in soil is desirable. Imbalanced P distribution across Canada shows significant areas of deficiency and excess. Regions with high P soils continue to be enriched while regions with low P soils are depleted. In most high P regions, continued P buildup is dominated by livestock manure. Options to rebalance P inputs in these regions include dispersing livestock operations.

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Section: Options For Mitigating Phosphorus Imbalancesmentioning

confidence: 99%

Addressing Imbalances in Phosphorus Accumulation in Canadian Agricultural Soils

2019

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“…These studies investigated the water quality effects of practices individually and in combinations as a function of their landscape positions, physiographic conditions of the fields, and hydroclimatic conditions. Socioeconomic factors that impede or foster adoption practices were also studied Motallebi et al, 2018;Osmond et al, 2019).…”

Section: Agricultural Conservation Practicesmentioning

confidence: 99%

Nutrient control in water bodies: A systems approach

et al. 2020

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Nutrient pollution is considered a wicked problem because of its many significant economic, social, and environmental impacts that are caused by multiple pollutants originating from a variety of sources and pathways that exist across different temporal and spatial scales. Further adding to the difficulty in managing nutrient pollution is that it is a global, rural, and urban problem. A systems approach can improve nutrient management by incorporating technological, environmental, and societal considerations. This approach can consider valuation of monetized and nonmonetized cobenefits and the inherent consequences that make up a nutrient management program.In this introduction to a special collection of papers on nutrient pollution, we describe several systems frameworks that can be used to support nutrient management and evaluation of system performance as it relates to impacts, then highlight several attributes and barriers of nutrient management that point to the need for a systems framework, and conclude with thoughts on implementing systems approaches to nutrient management with effective community engagement and use of new technologies. This special collection presents results from a USEPA Science to Achieve Results (STAR) initiative to advance solutions to nutrient pollution through innovative and sustainable research and demonstration projects for nutrient management based on a systems approach. These studies evaluate several promising nutrient control technologies for stormwater or domestic wastewater, investigate the effects of agricultural conservation practices and stream restoration strategies on nutrient loads, and discuss several challenges and opportunities-social, policy, institutional, and financial considerationsthat can accelerate adoption of reliable technologies to achieve system-level outcomes.

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“…This leads to a constantly shifting kaleidoscope of baselines and targets for P management ( Jarvie et al, 2013b). Bieroza et al (2019), Kleinman et al (2019), Osmond et al (2019), and Smith et al (2019) all highlight the need to address legacy P stores and mitigate the increased P losses that are expected with climate change. They also champion the need to consider potential trade-offs involving P management practices, such as between particulate and soluble forms of P ( Jarvie et al, 2017), as well as those practices that create "pollutant swapping" between P and nitrogen (N).…”

Section: A Kaleidoscope Of Challenges Facing Efficient Use Of Phosphorusmentioning

confidence: 99%

“…A dark and widening gap that can limit the effectiveness of remedial measures derives from the exclusion of end users at various points of the process of developing and implementing P mitigation strategies. Osmond et al (2019) explore that gap through their examination of factors affecting the efficacy and adoption of best management practices for improving water quality. They highlight the importance of watershed planning, farmer involvement in decision making, and educational outreach in successful mitigation programs.…”

Section: Focusing On Phosphorus Mitigation For Addressing Water Qualimentioning

confidence: 99%

Phosphorus mirabilis: Illuminating the Past and Future of Phosphorus Stewardship

Jarvie

Sharpley²,

Flaten³

et al. 2019

J of Env Quality

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After its discovery in 1669, phosphorus (P) was named Phosphorus mirabilis (“the miraculous bearer of light”), arising from the chemoluminescence when white P is exposed to the atmosphere. The metaphoric association between P and light resonates through history: from the discovery of P at the start of the Enlightenment period to the vital role of P in photosynthetic capture of light in crop and food production through to new technologies, which seek to capitalize on the interactions between novel ultrathin P allotropes and light, including photocatalysis, solar energy production, and storage. In this introduction to the Journal of Environmental Quality special section “Celebrating the 350th Anniversary of Discovering Phosphorus—For Better or Worse,” which brings together 22 paper contributions, we shine a spotlight on the historical and emerging challenges and opportunities in research and understanding of the agricultural, environmental, and societal significance of this vital element. We highlight the role of P in water quality impairment and the variable successes of P mitigation measures. We reflect on the need to improve P use efficiency and on the kaleidoscope of challenges facing efficient use of P. We discuss the requirement to focus on place‐based solutions for developing effective and lasting P management. Finally, we consider how cross‐disciplinary collaborations in P stewardship offer a guiding light for the future, and we explore the glimmers of hope for reconnecting our broken P cycle and the bright new horizons needed to ensure future food, water, and bioresource security for growing global populations. Core Ideas This special section comprises 22 papers celebrating the 350th anniversary of P discovery. Historical and emerging challenges and opportunities exist in P research and understanding. Authors address P use efficiency and a kaleidoscope of challenges for efficient P use. Focusing on place‐based solutions is required for effective P management. Cross‐disciplinary collaborations in P stewardship are needed for food and water security.

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Increasing the Effectiveness and Adoption of Agricultural Phosphorus Management Strategies to Minimize Water Quality Impairment

Cited by 37 publications

References 110 publications

Addressing Imbalances in Phosphorus Accumulation in Canadian Agricultural Soils

Addressing Imbalances in Phosphorus Accumulation in Canadian Agricultural Soils

Nutrient control in water bodies: A systems approach

Phosphorus mirabilis: Illuminating the Past and Future of Phosphorus Stewardship

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