Manganese Deficiency

scouted June 1, 2023

Soybeans were scouted at the V9-10 growth stage and interveinal chlorosis was observed. Plants appeared pale green. These were soybeans in research plots planted in late March. Greater occurrence of symptoms were observed within defined areas of the field.
This issue was confirmed by an NC State Extension Specialist as a Manganese (Mn) Deficiency. Interveinal chlorosis of leaves, pale green color of the whole plant, and stunted growth can be associated with a manganese deficiency in soybeans. If an environment has been over applied with lime, a manganese deficiency may be observed as a result of limited availability at high pH. When in-season deficiency occurs, foliar applications of Mn can remedy the deficiency.