While traveling through the farm country of southeastern Pennsylvania 2 weeks ago I noticed fields full of bright yellow stalks of a plant I can only assume is a crop cove as it is quite tall already indicating a fall planting an covers entire fields. It's a thin, stalky thing, about 23'' tall with a naked straw-like stiff stem for the first 13'' and the rest of the length having alternate leaf stems radiating unevenly around the main stem. At the end of each 5/8'' leaf stem is an upwardly-cupped, 1/4'' seed pod containing 6 brown, ovoid seeds. I sorted through many photos of cover crops but did not come across anything like it. Ever curious, I would be most grateful if you could identify this plant for me. I am enclosing 2 photos of a sample I brought home with me.