Current status of sustainable agriculture in Japan von Umekawa, M. (National Agricultural Research Center, Tsukuba, Ibaraki (Japan)), Yamamoto, K, Yamamoto, H, Kojima, K, Ito, S, Takahashi, S, Kusaba, T, Miura, K, Fujiwara, S, Owaki, Y, Kimura, T, Nakagawa, A, Takehara, T, Omura, T, Miyai, S, Suzuki, Y, Moriya, S, Yano, E, Mizukubo, T. etc

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