Indonesia have reached self sufficiency for rice at 2008 and corn at 2009. Actually, it can achieve more if the growth of productions can be optimized through increasing in productivity an harvest area. This paper aims to describe growth rates of harvested area, productivity and production of wetland rice and corn in east Java and their sources of growth during the period of 1990-2008. Growth rate of productivity as source of growth of wetland rice was more than the growth rate of harvest area. Growth rate of harvest area as source of growth of corn was more than the growth rate of productivity. It is necessary to enhance rice and corn production through agricultural technology research and development, controlled agricultural land conversion, and infrastructure development.