This study provides an economic method to identify the impact of changes in stochastic (climatic) and non-stochastic (farm managed) inputs on the production of a representative sample of French field crop farms between 1990 and 2015. This economic decompositionmethod specifically attributes output changes to the impact of soil characteristics, climatic variables, non-stochastic farm managed inputs, and technological adaptation change. We quantify these impacts by decomposing product changes over time via Luenberger-type indicators, through a second-order flexible parametric technology estimation. We identify large disruptive effects due to climatic variables, especially since the beginning of this century.