Abstract
ABSTRACT Iron (Fe)-deficiency chlorosis is a common constraint when soybean (Glycine max L.) is grown on calcareous soils. Considerable differences exist among soybean genotypes for susceptibility to Fe chlorosis. In order to evaluate the effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells), field studies were conducted for the years 2001 and 2002 in a calcareous soil. Although, available Fe of the studied soils was either lower than critical level or in marginal range, application of Fe-EDDHA did not result in a significant increase in soybean yield probably, due to the antagonistic relationships between Fe and manganese (Mn). It appears that Fe soil test as the only criterion for Fe fertilizers recommendation is not appropriate and soil test for Mn is also recommended. Significant quadratic equations were obtained between chlorophyll meter readings (CMR) in growth stage 3 (GS3) with seed yield (SY) of A3237 and Black hack. However, SY of Wells showed close relationships with CMR in growth stage 4 (GS4). A tentative conclusion is that the chlorophyll meter is a reliable and non-destructive tool for the prediction of SY for the studied soybean genotypes in GS3 or GS4. Due to the fact that use of Fe fertilizer might cause nutritional disorder, use of Fe-efficient genotypes remains as an effective and economic sound practice. However, positive responses to Fe-chelate treatments are expected for genotypes with shoot Fe: Mn ratio less than 0.4 when both nutrients are in the sufficiency range. Obviously, such a requirement limits the utilization of Fe-chelate to post-emergence fertilization.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Fe-EDDHA application did not significantly increase soybean yield on calcareous soil
- Taxon
- soybean
Glycine maxe0 - Material
- A3237, Black hack, and Wellse0
- Treatment
- application of Fe-EDDHAe2
- Outcome
- soybean yielde2
- Direction
- increasee2
- Setting
- calcareous soile1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e1“field studies were conducted for the years 2001 and 2002 in a calcareous soil”
e2“application of Fe-EDDHA did not result in a significant increase in soybean yield probably, due to the antagonistic relationships between Fe and manganese (Mn)”
Claim · model-written summary
The lack of yield response to Fe-EDDHA probably reflects antagonism between Fe and manganese
- Taxon
- soybeanGlycine maxe0
- Outcome
- soybean yielde2
- Qualifier
- antagonistic relationships between Fe and manganese (Mn)e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e2“application of Fe-EDDHA did not result in a significant increase in soybean yield probably, due to the antagonistic relationships between Fe and manganese (Mn)”
Claim · model-written summary
Available Fe in the studied calcareous soils was lower than critical level or in marginal range
- Taxon
- soybeanGlycine maxe0
- Outcome
- available Fe of the studied soilse3
- Direction
- lower than critical levele3
- Qualifier
- marginal rangee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e3“available Fe of the studied soils was either lower than critical level or in marginal range”
Claim · model-written summary
A soil test for Mn is recommended in addition to Fe soil testing for soybean
- Taxon
- soybeanGlycine maxe0
- Outcome
- soil test for Mne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e1“soil test for Mn is also recommended”
Claim · model-written summary
A Fe soil test alone is not an appropriate criterion for Fe fertilizer recommendation
- Taxon
- soybeanGlycine maxe0
- Outcome
- Fe soil test as the only criterion for Fe fertilizers recommendatione1
- Qualifier
- not appropriatee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e1“Fe soil test as the only criterion for Fe fertilizers recommendation is not appropriate”
Claim · model-written summary
Seed yield of soybean genotypes A3237 and Black hack was significantly related to chlorophyll meter readings at growth stage 3 by quadratic equations
- Taxon
- soybeanGlycine maxe0
- Material
- A3237 and Black hacke4
- Organ / stage
- growth stage 3e4
- Outcome
- seed yielde4
- Qualifier
- Significant quadratic equationse4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e4“Significant quadratic equations were obtained between chlorophyll meter readings (CMR) in growth stage 3 (GS3) with seed yield (SY) of A3237 and Black hack”
Claim · model-written summary
Seed yield of soybean genotype Wells showed close relationships with chlorophyll meter readings at growth stage 4
- Taxon
- soybeanGlycine maxe0
- Material
- Wellse5
- Organ / stage
- growth stage 4e5
- Outcome
- SYe5
- Qualifier
- close relationshipse5
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e5“SY of Wells showed close relationships with CMR in growth stage 4 (GS4)”
Claim · model-written summary
The chlorophyll meter is a reliable and non-destructive tool for predicting soybean seed yield in growth stage 3 or 4
- Taxon
- soybeanGlycine maxe0
- Outcome
- the chlorophyll meter is a reliable and non-destructive tool for the prediction of SYe6
- Qualifier
- in GS3 or GS4e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e6“the chlorophyll meter is a reliable and non-destructive tool for the prediction of SY for the studied soybean genotypes in GS3 or GS4”
Claim · model-written summary
Use of Fe-efficient soybean genotypes is an effective and economic practice
- Taxon
- soybeanGlycine maxe0
- Outcome
- use of Fe-efficient genotypese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e7“use of Fe-efficient genotypes remains as an effective and economic sound practice”
Claim · model-written summary
Positive responses to Fe-chelate treatments are expected in soybean genotypes with shoot Fe:Mn ratio below 0.4
- Taxon
- soybeanGlycine maxe0
- Treatment
- Fe-chelate treatmentse1
- Outcome
- positive responsese1
- Direction
- positivee1
- Qualifier
- genotypes with shoot Fe: Mn ratio less than 0.4e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e1“positive responses to Fe-chelate treatments are expected for genotypes with shoot Fe: Mn ratio less than 0.4”
Claim · model-written summary
Fe-chelate use is limited to post-emergence fertilization by the shoot Fe:Mn requirement
- Taxon
- soybeanGlycine maxe0
- Outcome
- utilization of Fe-chelate to post-emergence fertilizatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“effectiveness of iron-ethylenediamine di-o-hydroxyphenylacetic acid (Fe-EDDHA) for three soybean genotypes (A3237, Black hack, and Wells)”
e1“such a requirement limits the utilization of Fe-chelate to post-emergence fertilization”
The same questions in other papers
iron atom · yield · Glycine max (soybean)Results differ
8 papers in the same direction as this paper · 37 in the opposite direction
- no effect
- negative
- positive
42 papers more in this group
See all 46 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.