Iron Deficiency Chlorosis - Agronomic Impact

Chlorosis can result in reduced soybean growth and yield, as illustrated in the graph below.

 

Relationship between the severity of chlorosis at the 5-6 trifoliolate stage and seed yield of soybean, North Dakota, 1998-2000.
R. Jay Goos , North Dakota State University

The rating scale:

1=no chlorosis, plants normal and green

2=a slight yellowing, no differentiation between veinal and interveinal areas on the leaf

3=interveinal chlorosis (leaf veins green but interveinal areas yellow), but no indication of stunting of growth or necrosis (death) of leaf tissue

4=interveinal chlorosis with reduced growth or some necrosis of leaf tissue

5=very severe chlorosis, plants with stunted growth, and youngest leaves and growing point necrotic, or entire plants dead.

 

 

 


 

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