Early planted corn always involves the risk of cold weather in the weeks after planting.
Bob Nielsen
Historical yield trends offer a glimpse into the future.
Corn grain yields in the U.S. have steadily increased since the late 1930’s.
This summary is based on 55 field scale research trials conducted at Purdue Ag. Centers and with on-farm collaborators around the state of Indiana from 2014 – 2022.
Sulfur Deficiency
Sulfur (S) deficiency has become more common in
Indiana crops because S emissions from coal-fired power
plants have decreased over the past few decades
(Camberato et al., 2022). Consequently, atmospheric S
deposition to soils has also decreased.
Sulfur deficient corn plants exhibit a general yellow-
green color from top to bottom of the plant, often also
with visible leaf striping (Fig. 1). Other nutrient deficiencies
can cause striping and can sometimes be confused with S
Excessive rainfall events (aka “goose-drownders”, “toad-stranglers”) that occur late in the growing season can cause flooding of rivers, creeks, and streams as well as ponded areas within fields distant from floodwaters.
Pollination in corn is the act of transferring pollen from the tassels to the emerged silks of the ear.
Excessive drying of the upper soil profile is conducive for the development of what some of us affectionately call the “rootless corn” or “floppy corn” syndrome.
The consequences of flooding, ponding, and saturated soils on young corn depend heavily on the duration of the stress and temperatures.
Purpling of corn plant tissue, by itself, does not decrease yield. The cause of the purpling determines whether yield loss will eventually occur.
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