By Dr. Laura Lindsey, Dr. Ossler Ortez, Taylor Dill, Maria Kessler, and Diego Miranda Adapted from C.O.R.N. 2025-34

As soybean harvest ramps up throughout Ohio, there are some reports of green stem, including in the Battle for the Belt plots at the Northwest and Western Agriculture Research Stations. Green stem is a disorder where the stems stay green and, at times, hold their leaves, while the pods have achieved their mature brown color.

Crop senescence and remobilization is the movement of nutrients from the leaves and stems to the pod and seeds; this is a source-sink relationship. If the “sinks” (pods and seeds) are aborted in response to crop stressors, the nutrients are not remobilized from the “source” (stems and leaves). When this happens, nutrients generally linger in the stem, c

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