As soybean harvest approaches, farmers have a narrow, high-value window to uncover a hidden yield thief.

Soybean cyst nematode (SCN) and other parasitic nematodes can cut yields sharply with no visible symptoms, and fall, right after harvest, is the best time to test soil and find out what’s lurking. To help farmers act on that window, the Soy Checkoff is directing growers to the Soybean Nematode M…