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Effect of soil moisture on biological nitrogen fixation in pot grown Phaseolus vulgaris L



Effect of soil moisture on biological nitrogen fixation in pot grown Phaseolus vulgaris L



Sarhad Journal of Agriculture 10(3): 209-216



The effect of soil moisture on nodulation, leghaemoglobin content and biological nitrogen fixation were studied at different ontogenetic stages of Phaseolus Cv. Motalskobelia grown in pots containing 6 kg of podzol soil at Moscow Agricultural Academy. the data illustrated that higher and lower moisture levels reduced nitrogen fixation (C-2H-2 reduction). Lower levels of moisture drastically decreased nodulation, leghaemoglobin content of nodules and N-2 fixation than higher moisture levels of soil. Comparing the ontogenetic stages of crop it was observed that C-2H-2 reduction and leghaemoglobin content of nodules increased from budding till pod filling and thereafter decreased. It is concluded that symbiotic nitrogen fixation in Phaseolus (Field bean) is positively correlated with moisture level, which was higher at 16-20 per cent moisture content of soil and among the ontogenetic stages it was maximum at pod filling.

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Accession: 002604574

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