The Mysteries Of Yellow Soybeans: Iron deficiency chlorosis is an issue for more farmers

摘要

Those mysterious green wheel tracks. Kevin Capistran has seen them often in northwestern Minnesota soybean fields: healthy green plants that follow equipment tracks through stretches of sickly yellow soybeans. Or -in dry years - just the opposite: yellow wheel tracks cutting through green soybeans. Wheel track syndrome is just one of the unexplained mysteries connected with iron deficiency chlorosis, a complex, poorly-understood problem that robs soybean yields and costs Midwest farmers millions of dollars.