although on average climate change may have a negative impact on yields the projected yields by are still higher than current yields for most commodities in the case of maize for instance under scenario climate may reduce the potential yields by almost however the maize yields are still expected to be about higher than they were in the two scenarios that use inputs from the dssat crop model scenario ipsldssat and hadleydssat result in higher world prices for maize wheat and rice than do the two scenarios using the lpjml crop model scenario ipsllpjml and hadleylpjml