References
- Asano, H., Isobe, K. and Tsuboki, Y. 1998. Palatability of rice and effect of placebo using aigamo duck (crossbred of wild and domestic ducks) cultivation methods. Jpn. J. Crop Sci. 67 : 174-177.
- Asano, H., Isobe, K. and Tsuboki, Y. 1999a. Eating habits and behaviour of aigamo ducks in paddy field. J. Weed Sci. Tech. 44 : 1-8.
- Asano, H., Isobe, K. and Tsuboki, Y. 1999b. Effect of harvest time on the quality and palatability of paddy rice cultivated by aigamo duck farming system. Jpn. J. Crop Sci. 68 : 375-378.
- Asano, H., Isobe, K. and Kanehira, T. 2001. Changes in weed emergence in paddy fields with continuous aigamo duck farming, An example in Yabe town, Kumamoto prefecture. J. Weed Sci. Tech. 46 : 19-24.
- Egashira, K., Tashima, F., Tsuji, T., Inoue, Y. and Furuno, T. 2000. Self-recycling nitrogen balance in paddy field of the aigamo-paddy cultivation. Jpn. J. Soil Sci. Plant Nutr. 71 : 695-696.
- Goh, B., Wei, H., Takayama, K., Nakanishi, Y., Manda, M., Shimotashiro, T. and Matsumoto, S. 2001. Effect of physical stimulation by free-ranging aigamo ducks on rice growth and yield under a rice-duck farming system. Jpn. J. Livest. Management 37 : 69-74.
- Manda, M., Uchida, H., Nakagama, A., Matsumoto, S., Shimoshikiryo, K. and Watanabe, S. 1993a. Effects of aigamo ducks (crossbred of wild and domestic ducks) herding on weeding and pest control in the paddy fields. Jpn. Poult. Sci. 30 : 365-370.
- Manda, M., Uchida, H., Nakagama, A., Matsumoto, S., Shimoshikiryo, K. and Watanabe, S. 1993b. Effects of aigamo ducks (crossbred of wild and domestic ducks) herding on growth and production of rice plant in paddy fields. Jpn. Poult. Sci. 30 : 443-447.
- Matsushima, S. 1995. III Physiological mechanism of dry matter production Chapter 8 Physiology of high-yielding rice plants from the viewpoint of yield components. In T. Matsuo, K. Kumazawa, R. Ishii, K. Ishihara and H. Hirata eds., Science of the Rice Plant Vol. Two Physiology. Food and Agriculture Policy Research Center, Tokyo. 737-766.
- Tashima, F., Tatsumoto, T. and Egashira, K. 2003a. Nitrogen balance in the paddy field of the aigamo-paddy cultivation. Jpn. J. Soil Sci. Plant Nutr. 74 : 15-21.
- Tashima, F., Tatsumoto, T. and Egashira, K. 2003b. Self-recycling nitrogen balance in the paddy field of the aigamo-paddy cultivation (Part 2). Jpn. J. Soil Sci. Plant Nutr. 74 : 73-75.
- Toriyama, K. 1996. Progress and prospect of the research on paddy soil management under various rice growing system. 1. Progress in nutrient behavior and management research on paddy soil (1) Nitrogen. Jpn. J. Soil Sci. Plant Nutr. 67 : 198-205.
- Yoo, I., Kimura, M., Wada, H. and Takai, Y. 1990. The release of organic and inorganic nutrients from soils surface-applied with rice straw and its contribution to biological N2 fixation. Jpn. J. Soil Sci. Plant Nutr. 61 : 579-585.