Farmland resources are the most basic material for grain production. Therefore, the impact of farmland use transition (FUT) on grain production is receiving increasing attention from scholars. However, only a few studies have explored the spatial spillover effects of FUT on grain production and investigate the impact difference under topographical constraints. To fill this gap, this study uses county-level panel data of farmland use and grain production in Hubei Province from 2005 to 2017 and constructs a spatial econometric model to investigat...