P4169

2025 XtendFlex Soybean Early Maturity Group V Variety Response to Iron Deficiency Chlorosis

Brand	Variety	IDC Tolerance Score¹					Avg. IDC Tolerance Score²
Asgrow	AG54XF5	4	4	4	5	5	4
Dyna-Gro	S55XF95	4	4	5	5	5	5
NK Seeds	NK52-M2XFS	5	5	5	5	6	5
Progeny	P 5525XF	5	5	5	5	6	5
Progeny	P 5751XFS	4	5	6	6	6	5
Asgrow	AG50XF5	6	7	6	6	6	6
Asgrow	AG56XF2	5	5	6	6	6	6
Innvictis	A5445XF	6	6	6	6	6	6
Progeny	P 5221XFS	6	6	7	6	6	6
Progeny	P 5335XFS	6	6	6	6	6	6
Revere	55-F92	6	6	7	6	6	6
Asgrow	AG52XF5	7	7	7	7	7	7
Great Heart Seed	GT-5110XF	8	8	9	8	8	8
Progeny	P 5056XFS	8	8	8	8	8	8
Revere	53-F84	8	8	9	9	8	8
Revere	51-F31	8	9	9	9	9	9

1 Tolerance scores were assigned on a scale of 1 to 10 with 1 being completely tolerant and 10 being completely susceptible. The five individual columns under this heading present tolerance scores collected at one-week intervals beginning at 21 days after planting. All scores are displayed as an average from two Mississippi locations (Monroe County and Noxubee County).

2 Overall tolerance score averaged across all rating intervals and locations (p = 0.001).

These data are intended to serve as an additional resource for variety selection specifically for soils with a history of problems associated with iron deficiency chlorosis. Consult other sources such as results from official variety trials and demonstration programs for detailed information regarding variety performance.

Publication 4169 (POD-12-25)

By Justin Calhoun, PhD, Assistant Professor, Brittany Rhea, Extension Associate II, William Paul O’Neal, Extension Technician, Paul Garrett Oswalt, Extension Associate III, Maddie Douglas, Graduate Research Assistant, Plant and Soil Sciences, Brad Burgess, Director, MAFES Official Variety Trials.

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P4169