Abstract: Clustered sensor networks has been introduced into WSNs of environmental monitoring system in agriculture production，which has been shown to be increasingly beneficial to increasing system throughput，decreasing system delay，and conserving energy. However，the existing clustered scheme did not provide authentication for cluster head in its setup phase and steady phase. Hence，this study provided BA-LEACH，which was a new security solution for cluster head authentication and could be helpful to enhance the security in clustered sensor networks with comparatively lower energy consumption.

Key words: farmland information collection system, wireless sensor network, cluster head authentication