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Article
The requirement of zinc for improvement of crop yield and mineral nutrition in the maize–mungbean–rice system
A study was made over 3 years to find out an optimum rate of Zn application for the maize–mungbean–rice crop** system in a calcareous soil of Bangladesh. Zinc application was made at 0, 2 and 4 kg ha−1 for maiz...
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Article
The response ofAzolla pinnata R. Brown to the split application of phosphorus and the transfer of assimilated phosphorus to flooded rice plants
A field experiment was conducted at the Bangladesh Rice Research Institute, Joydebpur, Dhaka during the late wet season. Basal application of P at both 5 and 10 kg ha−1 significantly increased total biomass produ...
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Article
Fate of nitrogen applied as Azolla and blue-green algae (Cyanobacteria) in waterlogged rice soils—a15N tracer study
15N tracer was used to detect the extent to which nitrogen of appliedAzolla caroliniana, Anabaena variabilis andNostoc muscorum was available for assimilation by the growing rice plants in pots under 4 cm flood ...
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Article
A15N tracer study to compare nitrogen supply by Azolla and ammonium sulphate to IR8 rice plants grown under flooded conditions
A pot experiment was carried out using a Bangladesh sandy loam paddy soil of pH 6.9 to compare the rates at which nitrogen from Azolla and ammonium sulphate was available to a high yielding rice variety, IR8, ...
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Chapter
A study on the availability of biologically fixed atmospheric dinitrogen by the Azolla-Anabaena complex to flooded rice crops
A 15 N tracer study was planned to obtain information on the following aspects: (a) the rate of decomposition of Azolla applied to a flooded rice soil, (b) uptake of mineralized Azolla-N by the standing rice crop...
