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Long-term Productivity of Intensive Rice Cropping Systems on the Central Plain of Thailand

  • J. J. Walcott (a1), M. Chauviroj (a1), A. Chinchest (a1), P. Choticheuy (a1), R. Ferraris (a1) and B. W. Norman (a1)...

Summary

The productivity of seven multiple rice-cropping systems, utilizing a short-duration cultivar under irrigation, were assessed over 5 years. Systems of one, two and three crops a year were compared. Multiple cropping reduced grain yield, panicles m-2, total dry matter and nitrogen uptake per crop. However, the unfertilized three-crop-per-year system averaged 9·1 t grain, 17·1 t DM and 126 kg N ha-1 per annum, without showing a long term decline in productivity. Recovery and utilization of nitrogen fertilizer were generally low compared to other experiments, and were highest for the early dry season cropping period.

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Long-term Productivity of Intensive Rice Cropping Systems on the Central Plain of Thailand

  • J. J. Walcott (a1), M. Chauviroj (a1), A. Chinchest (a1), P. Choticheuy (a1), R. Ferraris (a1) and B. W. Norman (a1)...

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