Journal: Advances in Agronomy

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Elsevier

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0065-2113
0065-2164

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Publications 1 - 8 of 8
  • Chapter One – Mineral–Organic Associations: Formation, Properties, and Relevance in Soil Environments
    Item type: Journal Article
    Kleber, Markus; Eusterhues, Karin; Keiluweit, Marco; et al. (2015)
    Advances in Agronomy
  • The chemical nature of soil organic phosphorus – a critical review and global compilation of quantitative data
    Item type: Journal Article
    McLaren, Timothy Ian; Smernik, Ronald J.; McLaughlin, Michael J.; et al. (2020)
    Advances in Agronomy
    Historically, the chemical nature of organic phosphorus (P) in soil has largely been considered to comprise of recognizable biomolecules that predominantly include inositol phosphates, nucleic acids and phospholipids. However, these forms alone do not explain the existence of, or account for the processes responsible for, a larger pool of “unresolved” organic P that exists in soils. We critically reviewed the historic literature and carried out a global compilation of quantitative data to understand the chemical nature of soil organic P, including insight on what might constitute unresolved forms. We identified five key eras spanning the mid-1800s to current. Understanding of the chemical nature of organic P has largely reflected the predominant analytical technique in use, which generally involved focusing on a particular class of organic P. While inositol phosphates have been a focus throughout most eras, quantitative data reveal that the composition of the majority of organic P (typically > 50%) in soil remains unresolved. Insight on its chemical nature has revealed that it is largely comprised of phosphomonoesters (P–O–C) and is associated with large molecular weight fractions, including the soil humic acid fraction. Furthermore, there is strong evidence that this is concomitant with the existence of a broad spectral feature that appears along with sharp peaks attributable to specific compounds in the phosphomonoester region of solution 31P nuclear magnetic resonance spectra. Here, we highlight the need to improve our understanding of the chemical nature and cycling of diverse forms of organic P in soil, including that of “unresolved” pools. This will necessitate the use of multiple techniques and approaches in soil biogeochemistry that require a holistic approach to understanding soil organic matter dynamics, and the association of organic P with soil organic carbon. © 2020 Elsevier Inc.
  • Soil Spectroscopy: An Alternative to Wet Chemistry for Soil Monitoring
    Item type: Journal Article
    Nocita, Marco; Stevens, Antoine; Wesemael, Bas van; et al. (2015)
    Advances in Agronomy
  • Chapter Two - Soil Water Characteristics of European SoilTrEC Critical Zone Observatories
    Item type: Journal Article
    Rousseva, Svetla; Kercheva, Milena; Shishkov, Toma; et al. (2017)
    Advances in Agronomy
  • Improved Phosphorus Recycling in Organic Farming: Navigating Between Constraints
    Item type: Journal Article
    Möller, Kurt; Oberson, Astrid; Bünemann, Else K.; et al. (2018)
    Advances in Agronomy
  • Geochemical aspects of phytosiderophore-promoted iron acquisition by plants
    Item type: Review Article
    Kraemer, Stephan M.; Crowley, D.E.; Kretzschmar, Ruben (2006)
    Advances in Agronomy
  • Quantifying the Incipient Development of Soil Structure and Functions Within a Glacial Forefield Chronosequence
    Item type: Journal Article
    Andrianaki, M.; Bernasconi, Stefano M.; Nikolaidis, Nikolaos P. (2017)
    Advances in Agronomy
  • Optimizing nitrogen use efficiency in European livestock systems: From feed to plant growth
    Item type: Book Chapter
    Epper, Carole A.; Zavattaro, Laura; Velthof, Gerard L.; et al. (2025)
    Advances in Agronomy ~ Advances in Agronomy
    Nitrogen (N) is a crucial nutrient for agriculture. Its unlimited provision by the Haber-Bosch process has led to high N surplus in agriculture, causing severe negative environmental externalities. The reduction of N losses in livestock systems and consequent enhancement of their nitrogen use efficiency (NUE) represents a key lever to substantially reduce the N surplus to meet European environmental policy targets. This review evaluates the potentials to improve the NUE of European cattle and pig livestock systems from feed to plant N use along the whole livestock system cascade. It discusses options to improve feed NUE and the current measures to reduce N losses at housing, manure storage and application as well as crop N recovery. The findings are synthesized at the overall livestock system level using exemplary case-study farms from selected European regions, to highlight potentials for livestock system NUE improvements in the context of the current and future European legislations. All case-study farms have already implemented measures for N loss mitigation, and their livestock system NUE reaches values between 55 % and 75 %. With the implementation of additional measures such as liquid manure acidification, low emission technologies and best field management, livestock system NUE can reach values between 75 % and 85 %. In order to achieve such high livestock system NUE and meet environmental goals, a scaled implementation of best available technologies is essential, and has to go hand in hand with a legislative harmonization and a targeted development of additional reduction measures and auxiliary tools for farmers.
Publications 1 - 8 of 8