Dryland Legume Pasture Systems: Medic nodulation and nitrogen fixation

There are reports of low grain protein levels in wheat following medic pastures and many observations of poor medic nodulation. Previous work has shown that rhizobial inoculation can improve the nodulation of medics in the SA and Victorian Mallee, and that more generally about 50% of the populations of medic rhizobia in soils are suboptimal in their nitrogen (N) fixationcapacity. This trial aimed to:• Determine if inoculation can improve medic nodulation at Minnipa,• Quantify the amount of N fixed by different legumes, and• Assess impacts on the following wheat crop.