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SSS5.2

New and traditional soil amendments: impacts, benefits, and risks
Convener: César Plaza  | Co-Conveners: Gabriel Gascó Guerrero , Jorge Paz-Ferreiro , Ana María Méndez , Gerhard Soja , Claudio Zaccone 
Orals
 / Thu, 12 Apr, 08:30–12:00  / Room K2
Posters
 / Attendance Thu, 12 Apr, 17:30–19:00  / Hall X3
Soil organic matter (SOM) plays a vital role not only in soil fertility and quality (by providing a number of physical, chemical, and biological benefits), but also in C cycling.
The decline of SOM represents one of the most serious threats facing many arable lands of the world. Crop residues and animal manures have long been used as soil organic amendments to preserve and enhance SOM pools. Nowadays, organic amendments originate from many kinds of organic wastes, which are being increasingly produced mainly by farms, food and energy industries, and municipalities. Besides serving as a source of organic matter and plant nutrients, these materials may contribute to fight plant diseases and reduce soil contamination, erosion, and desertification.
At the same time, a safe and useful application of organic amendments requires an in-depth scientific knowledge of their nature and impacts on the soil-plant system, as well as on the surrounding environment.
This session will focus on the current research and recent advances on the use of organic amendments in modern agriculture as well as for the restoration of degraded soils, covering physical, chemical, biological, biochemical, environmental and socio-economical aspects.