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This calendar of events related to sustainable nutrient use and recycling is maintained in co-operation between the European Sustainable Phosphorus Platform (ESPP) and the Sustainable Phosphorus Alliance (SPA) in North America.

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Perspectives for reducing “legacy phosphorus” in agricultural soils

2 February 2022, 14h – 17h CET

The webinar will discuss:
i) relationships between draw-down of soil P and crop productivity
ii) relationships between draw-down of soil P and diffuse P losses from agricultural soils


This ESPP webinar will follow on from the SPA (USA)
webinar “A Legacy of Phosphorus”, 30th September 2021, 18h-19h30 CEST and from the Frontiers in Earth Science special on ‘Legacy Phosphorus’ summarised in ESPP eNews n°56

A SCOPE Newsletter Special Issue will summarise this ESPP webinar and will also include selected further abstracts submitted as well as a c. 20 relevant recent scientific publications.

14h00 – 14h30 (4 x 5 min + 10 mins discussion)
Opening: What do we mean by “legacy P”?
Chair: Christiana Staudinger, Jakob Santner, University of Natural Resources and Life Sciences, Austria

14h30 – 15h00 (5 x 4 min + 10 mins discussion)
Europe: impacts of drawing down legacy P on crop yields (long-term trials)
Chair: Kasper Reitzel, University of Southern Denmark

15h00 – 15h40 (8 x 3 min + 15 mins discussion)
Worldwide: legacy P, draw down, soil phosphorus
Chair: Steve Hallam, International Fertiliser Society

15h40 – 15h50 – break

15h50 – 16h20 (3 x 5 min, 10 min questions)
How does legacy P or draw-down impact losses to surface waters?

16h20 – 17h00 (8 x 2 minutes, 20 mins discussion)
Conclusions from panel of experts
Chair: Steve Hallam, International Fertiliser Society

Panellists are invited to draw conclusions (and future perspectives), 2 min each, and also to monitor and animate the discussion in the Chat and in the above questions/discussion sessions.

  • Jim Elser, Sustainable Phosphorus Alliance, Arizona State University, USA
  • Luke Gatiboni, North Carolina State University, USA
  • Marzena Smol, Polish Academy of Sciences, Poland
  • Antonio Delgado, University of Seville, Spain
  • Kari Ylivainio, Natural Resources Institute (LUKE), Finland
  • Leonardus Vergutz, Mohammed VI Polytechnic University, Morocco

The programme is available in pdf here.

Video recording is available here

Book of abstracts is available here

Edited CHAT transcript is available here