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Nippon sakumotsu gakkai kiji
To investigate the possibility of estimating symbiotic nitrogen fi xation through the measurements of dry matter production and evapotranspiration, we grew two isogenic lines of soybeans, non-nodulating line T201 and nodulating line T202 under three and fi ve levels of nitrogen (N) application, respectively. The chlorophyll content (SPAD value) of T201 was lower than that of T202, and the difference between them expanded successively from the nil to high-N plot. As the difference in nodule drydoi:10.1626/jcs.74.344 fatcat:dm6bhx7sf5bbrfvqmtzye74mpy