Abstract
Soybean [ Glycine max (L.) Merr.] production has increased by more than 55,000 ha in the last 25 yr in the western third of Kansas, a region with soils that can be prone to Fe chlorosis. The objective of this study was to evaluate the relative effectiveness of varietal selection, seed‐applied Fe fertilizer, and foliar Fe application to reduce the incidence of Fe chlorosis under irrigated soybean production. Seven locations with a history of Fe deficiency in soybeans were selected. The study consisted of a factorial design with three foliar treatments (two chelated Fe fertilizer forms and no foliar), two seed‐applied Fe fertilizer treatments (with and without chelated Fe fertilizer), and two different varieties (a nontolerant and tolerant commercial variety). Plant population, chlorophyll meter (CM) readings (V3 and V6 growth stage), plant height at maturity, and grain yield were measured. Foliar Fe application did not affect any plant parameter except for CM reading and grain yield at one location. However, the use of seed‐applied chelated Fe fertilizer significantly increased CM readings at the V3 and V6 growth stages, plant height at maturity, and grain yield across all locations. Given soil conditions conducive to the development of severe iron chlorosis, seed‐applied chelated Fe fertilizer increased yields by approximately 55% for both varieties. Chlorosis quantified as CM readings at V3 to V6 growth stage may not be correlated to the yield potential of a variety in all environments. This suggests that producers should choose the best varieties primarily based on yield potential if supplemental seed‐applied Fe fertilizer will be used.
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Claims 9
Claim · model-written summary
Foliar iron did not affect most measured plant parameters
- Taxon
- Soybean
Glycine maxt0 - Treatment
- Foliar Fe applicatione0
- Outcome
- any plant parametere0
- Direction
- did not affecte0
- Qualifier
- except for CM reading and grain yield at one locatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar Fe application did not affect any plant parameter except for CM reading and grain yield at one location”
t0“Soybean”
Claim · model-written summary
Foliar iron affected CM reading at one location
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Foliar Fe applicatione0
- Outcome
- CM readinge0
- Qualifier
- at one locatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar Fe application did not affect any plant parameter except for CM reading and grain yield at one location”
t0“Soybean”
Claim · model-written summary
Foliar iron affected grain yield at one location
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Foliar Fe applicatione0
- Outcome
- grain yielde0
- Qualifier
- at one locatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Foliar Fe application did not affect any plant parameter except for CM reading and grain yield at one location”
t0“Soybean”
Claim · model-written summary
Seed applied chelated iron significantly increased CM readings
- Taxon
- SoybeanGlycine maxt0
- Treatment
- seed‐applied chelated Fe fertilizere0
- Outcome
- CM readingse0
- Direction
- increasede0
- Qualifier
- across all locationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of seed‐applied chelated Fe fertilizer significantly increased CM readings at the V3 and V6 growth stages, plant height at maturity, and grain yield across all locations”
t0“Soybean”
Claim · model-written summary
Seed applied chelated iron significantly increased plant height
- Taxon
- SoybeanGlycine maxt0
- Treatment
- seed‐applied chelated Fe fertilizere0
- Outcome
- plant heighte0
- Direction
- increasede0
- Qualifier
- across all locationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of seed‐applied chelated Fe fertilizer significantly increased CM readings at the V3 and V6 growth stages, plant height at maturity, and grain yield across all locations”
t0“Soybean”
Claim · model-written summary
Seed applied chelated iron significantly increased grain yield
- Taxon
- SoybeanGlycine maxt0
- Treatment
- seed‐applied chelated Fe fertilizere0
- Outcome
- grain yielde0
- Direction
- increasede0
- Qualifier
- across all locationse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of seed‐applied chelated Fe fertilizer significantly increased CM readings at the V3 and V6 growth stages, plant height at maturity, and grain yield across all locations”
t0“Soybean”
Claim · model-written summary
Under severe iron chlorosis conditions, seed applied chelated iron increased yield approximately 55% for both varieties
- Taxon
- SoybeanGlycine maxt0
- Treatment
- seed‐applied chelated Fe fertilizere0
- Outcome
- yieldse0
- Direction
- increasede0
- Value
- 55%e0
- Qualifier
- for both varietiese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Given soil conditions conducive to the development of severe iron chlorosis, seed‐applied chelated Fe fertilizer increased yields by approximately 55% for both varieties”
t0“Soybean”
Claim · model-written summary
Chlorosis meter readings may not correlate with variety yield potential in all environments
- Taxon
- SoybeanGlycine maxt0
- Organ / stage
- V3 to V6 growth stagee0
- Outcome
- yield potentiale0
- Qualifier
- may not be correlatede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorosis quantified as CM readings at V3 to V6 growth stage may not be correlated to the yield potential of a variety in all environments”
t0“Soybean”
Claim · model-written summary
Producers should choose varieties primarily for yield potential when using seed applied iron fertilizer
- Taxon
- SoybeanGlycine maxt0
- Outcome
- choose the best varieties primarily based on yield potentiale0
- Qualifier
- if supplemental seed‐applied Fe fertilizer will be usede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“producers should choose the best varieties primarily based on yield potential if supplemental seed‐applied Fe fertilizer will be used”
t0“Soybean”
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