Wireless Multimedia Sensor Network (WMSN) can be well suited in precision agriculture especially in rice fields to increase productivity and reduce risks. Real time data are collected from scalar, audio or video sensors to monitor the rice fields and to help farmers in the rice cultivation cycle. In this paper, a new clustering based routing protocol and an integer linear program was proposed, that balances the number of nodes in clusters. It aimed to balance the number of members in each cluster in order to reduce intra-cluster congestion as well as the number of congested cluster-heads and provide efficient multimedia data. Simulation results indicate that our proposed scheme outperforms other protocols proposed in the literature in terms of lifetime, number of members per cluster and the forwarded packets per CH.