Based on the land use analysis model of PS123, the simulation of soil salts effects on crop growth is integrated in PS123 model con sidering osmotic stress of the salt effects on water uptake and production. This salt integrated crop model is more suitable to be used in salinity land and wa ter irrigation simulation. This model is calibrated with field experiments condu cted at Hebei Quzhou Experimental Station of China Agricultural University. But there are still some problems to be solved such as the simu...