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Articles by A. Polthanee
Total Records ( 2 ) for A. Polthanee
  P. Suriyakup , A. Polthanee , K. Pannangpetch , R. Katawatin and Jean-Claude Mouret
  An experiment was conducted in a farmer’s field in Ban Muong village, Muang district in Khon Kaen province in 2003. The objective of this study was to investigate the effect of mungbean (Vigna radiata L.) residue and nitrogen rates (0, 30 and 60 kg N ha-1) on growth and yield of direct seeded rice (Oryza sativa L.) in rainfed riceland. The results showed that mungbean residue had no effect on tiller number, leaf area index and total top dry weight of rice in rice-mungbean intercropping or sole rice cropping. Also, mungbean residue had no significant effect on panicle number m-2, spikelets number per panicle, 1,000 grain weight, percentage filled grain, harvest index or grain yield However, mungbean residue tendes to increase rice grain yield over sole rice by 0.33 t ha-1(13 %) with had no nitrogen application. Rice grain yield was significantly affected by nitrogen rates. The highest rice grain yield (2.7 t ha-1) was obtained with a nitrogen rate of 30 kg N ha-1. Nitrogen fertilizer application at a rate of 60 kg N ha-1 decreased grain yield, when compared with 30 kg N ha-1.
  A. Polthanee and A. Kotchasatit
  A field experiment was carried out to investigate growth, yield and yield components of cassava and mungbean and land use efficiency, economic returns, and the uptake of soil nutrients (NPK). The results showed that total top dry weights, leaf area indices (LAI), yield and yield components of cassava were not affected by intercropping patterns and did on total top dry weights and leaf area of mungbean. Whilst grain dry weights, and pods per plant of mungbean were affected by cropping patterns but not with grains per pod and 1000-grain weights. Land equivalent ratio and combined economic value were much greater for intercropping patterns than that of the sole crop both cassava and mungbean. Nutrient uptake per hectare of roots, stems, leaves of cassava were unaffected by intercropping patterns but did with that of mungbean due to the differences in plant populations. Total NPK uptake of cassava and mungbean grown together under intercropping patterns was similar to that of sole crop of cassava. However, the margin profit was much greater for intercropping plants than that of the sole crop since market prices were higher and the residues of plant materials of mungbean could be used to improve soil fertility apart from nodules of this legume crop being produced.
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