A mathematical model is presented for the estimation of the contribution of biomass to the generation of electricity for a valley as a geographical scope of application. It is considered that a valley has several species that are cultivated during the year and that have by-products of the harvest that we have considered as biomass that can be used for the production of electricity that would benefit the valley's inhabiting community. We have called this integration between population and crops SmartValley, which leads to the use of monitoring, control, management and planning among the different agricultural-energy actors. The cultivation and production of plants shows production variations during the year and throughout the years. For this, the mathematical model has as an essential part the data of usable biomass from which the electricity production estimate is made. A case study has been considered for the present study: a typical valley on the north coast of Peru, where rice crops are quite common, and; they have the potential to be used for electricity generation.