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Checking For Nodulation of Annual Legumes (06/16/16)

Nodule development in annual legumes in the region is not a 100% sure thing.

Checking For Nodulation of Annual Legumes

Nodule development in annual legumes in the region is not a 100% sure thing. Signs that nodulation might be a problem are general yellowing of the legume starting about 2nd trifoliate stage. To determine nodulation, use a small garden trowel to scoop up soil and plant, then, gently brush the soil away from the roots. Pulling plants out of the soil may leave nodules behind. This is the same technique used when scouting for soybean cyst nematode infection of roots.

Dave Franzen

NDSU Extension Soil Specialist

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