6th International Symposium
on Soil Organic Matter

Healthy soils for sustainable agriculture: the role of SOM
3–7 September 2017 • Rothamsted Research • Harpenden (United Kingdom)

6th International Symposium
on Soil Organic Matter

Healthy soils for sustainable agriculture: the role of SOM
3–7 September 2017 • Rothamsted Research • Harpenden (United Kingdom)

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Session 4c: Organic nutrients?

Chairs:   Mark Farrell (SIRO, AU) and Martin Blackwell (Rothamsted Research, UK)

Organic phosphorus (P) and nitrogen (N) compounds comprise the majority of the total P and N found in many soils, yet historically studies have mostly focussed on inorganic forms. This is largely due to the assumption that only inorganic forms can be utilised by organisms and organic forms are unavailable or unreactive. However, there is an increasing amount of evidence that shows organic forms of N and P play a significant role in nutrient cycling. Hydrolysis of organic compounds by enzymes derived from plants and microbes means that organic P and N play a vital role in the nutrition of organisms in many systems. This session will explore this important topic which is changing the way we consider soil nutrient availability.  In particular, we welcome submissions that probe the implications of organic N and P uptake for C cycling in soils, and the roles that SOM perform in regulating organic N and P cycling.