The effect of NaCl salinity and water stress with polyethylene glycol on nitrogen fixation, stomatal response and transpiration of Medicago sativa, Trifolium repens and Trifolium brachycalycinum (subclover)

1. Sánchez‐Díaz, M.
2. Aparicio‐Tejo, P.
3. González‐Murúa, C.
4. Peña, J.I.