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The rice plants and carp (A), crab (B), and turtle (C) were photographed in the corresponding experimental plots (D, E, and F), which were arranged in completely randomized blocks in three rice-planting areas in Qingtian County (G), Panshan County (H), and Deqing County (I), respectively. The red circle in A indicates a rice hill. Photos of A, B and C were taken by Lufeng Zhao, Zhiming Li and Genlian Wang, respectively.
