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Nitrogen, phosphorus, and the ratio between them affect nodulation in Alnus incana and Trifolium pratense

Nitrogen, phosphorus, and the ratio between them affect nodulation in Alnus incana and Trifolium pratense

Symbiosis Rehovot 29(2): 91-105

Nodulation of Alnus incana by Frankia was studied at three levels of N (ammonium nitrate, 0.071-7.1 mM N) combined with three levels of P (0.01-1.0 mM) in a factorial design. Nodulation of Trifolium pratense by Rhizobium leguminosarum bv. trifolii was studied in a partial factorial design. Plants were in growth pouches for 10.5 weeks. In general, the degree of N inhibition depended on the P level.

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