During the 1990s through the early
part of the 2013 and 2014 seasons,
excess water significantly impacted
crop production in North Dakota.
We investigated if iron chelate
applied to the seed and available to
the developing plant may reduce
IDC severity. When soybean plants
develop the first or second trifoliolate
leaves, iron-deficiency chlorosis (IDC)
may appear in some production
fields. Chlorosis is caused by the plant
not being able to take up enough
iron (Fe), even if there is sufficient
Fe in the soil. We investigated if iron
chelate that was applied close to the
developing plant may reduce IDC
severity.
The objective of this research was to
determine if there is a yield advantage
for using three production practices:
controlled tile drainage, raised
beds and iron chelate (FeEDDHA)
seed application. The research was
conducted near Fargo and Casselton
in 2013 and 2014. Water-level control
structures were used to control
the water table at the Fargo site.
Raised beds, 12 inches tall and 30
inches apart, were made in the fall;
the control was planting soybeans
without a raised bed (flat). Two
iron-chelate (ortho-ortho-FeEDDHA)
seed-application rates (0 lbs A, the
control, and 3 lbs A) were used on
five varieties. Soybean stand counts,
IDC and plant-vigor scores, and SPAD
meter (measures chlorophyll content
or greenness) readings were taken.
Results
Across two years, no significant
differences for yield and height
were found between the open tile
and closed tile. However, the plots
planted on open-tile areas had less
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