Tuesday, July 6, 2010
An observation we have seen in very lightly textured soils under a center pivot is new emerging leaves appear yellow (photo on right). Tissue and soil samples were collected in both areas of healthy plants and areas of yellowing plants; these were then taken and examined by specialists at the University of Missouri Delta Research Center, where a conclusion was made that the yellowing was caused by a fertility issue. The analysis was run by the Delta Center Soils Lab, and, while there were no specific recommendations for center pivot irrigated rice, it appeared that sulfur may be the culprit. Ammonium sulfate was applied and watered in the field on July 3, 2010. We will follow up with the issue this week.
Posted by Kelly Cox at 10:30 AM