During the December 2009 SLP meeting in Addis Ababa, Mark van Wijk (WUR) and colleagues presented some modelling work that could help quantify the tradeoffs between uses of crop residues – either incorporated in the soil to maintain soil fertility or fed to cattle.
He emphasizes that the models help to quantify the consequences – ‘what if’ – of different decisions or strategies.
See his presentation:
Systemwide Livestock Programme 