1985
DOI: 10.1002/jpln.19851480511
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The Effect of Soil pH on Nodulation and N2‐Fixation of Winged Bean Psophocarpus tetragonolobus (L) D.C. Rhizobium Strains

Abstract: Nine effective Rhizobium strains of winged bean were tested for their symbiotic performance under different soil pH levels. In general, they performed best at soil pH 5.5. The performance of all the strains was poor when soil pH was either extremely low as 4.5 or high as 7.5. The strains RRIM 56, KUL-JN, KUL-Z3 were suitable for soils with a pH range of 5.5 to 6.0. The strains KUL-Z1, KUL-ZZ and KUL-GP could be only used in soils with a pH of 5.5. The strains KUL-BH, KUL-6.2Z and KUL-6.9Z could be used for ino… Show more

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