Abstract
Abstract Several greenhouse pot experiments were conducted on Fe‐deficient soils to determine agronomic effectiveness of various Fe sources applied alone or with fertilizers. Grain sorghum (Sorghum bicolor) response was greatest with FeEDDHA in all experiments. Several industrial byproducts containing Fe generally were not effective, but seed application and soil application of a natural organic complex containing Fe were somewhat effective in providing Fe to the crop. Effectiveness of FeS04 or FeHEDTA band applied with fluid fertilizers decreased in the order: polyphosphate suspension, orthophosphate suspension, urea‐ammonium nitrate solution. Crop response was greater with FeHEDTA than with FeSO4, in all fertilizers. Band application of urea‐phosphate (UP), an experimental acidic phosphate fertilizer containing urea, cogranulated with FeSO4 (to contain 4% Fe) was somewhat effective for grain sorghum. Crop response to UP‐Fe products decreased with level of water‐soluble Fe and percentage of the total Fe remaining in the ferrous form. Results show that agronomic effectiveness of Fe sources applied with fertilizers varies widely, depending upon chemical reactions which occur during manufacture or after soil application.
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Claims 8
Claim · model-written summary
Sorghum response was greatest with FeEDDHA in all experiments.
- Taxon
- Sorghum bicolor
Sorghum bicolore0 - Treatment
- FeEDDHAe0
- Outcome
- responsee0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain sorghum (Sorghum bicolor) response was greatest with FeEDDHA in all experiments.”
Claim · model-written summary
Industrial Fe byproducts were generally ineffective for sorghum.
- Taxon
- Grain sorghumSorghum bicolort0
- Treatment
- industrial byproducts containing Fee0
- Outcome
- not effectivee0
- Direction
- not effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Several industrial byproducts containing Fe generally were not effective”
t0“Grain sorghum”
Claim · model-written summary
Seed application of a natural organic Fe complex was somewhat effective.
- Taxon
- Grain sorghumSorghum bicolort0
- Treatment
- seed applicatione0
- Outcome
- providing Fe to the crope0
- Direction
- somewhat effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain sorghum”
e0“seed application and soil application of a natural organic complex containing Fe were somewhat effective in providing Fe to the crop”
Claim · model-written summary
Soil application of a natural organic Fe complex was somewhat effective.
- Taxon
- Grain sorghumSorghum bicolort0
- Treatment
- soil application of a natural organic complex containing Fee0
- Outcome
- providing Fe to the crope0
- Direction
- somewhat effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain sorghum”
e0“seed application and soil application of a natural organic complex containing Fe were somewhat effective in providing Fe to the crop”
Claim · model-written summary
For banded Fe sources, polyphosphate suspension was more effective than orthophosphate suspension, followed by urea-ammonium nitrate solution.
- Taxon
- Grain sorghumSorghum bicolort0
- Treatment
- FeS04 or FeHEDTA band applied with fluid fertilizerse0
- Outcome
- Effectivenesse0
- Direction
- decreasede0
- Comparator
- urea‐ammonium nitrate solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain sorghum”
e0“Effectiveness of FeS04 or FeHEDTA band applied with fluid fertilizers decreased in the order: polyphosphate suspension, orthophosphate suspension, urea‐ammonium nitrate solution.”
Claim · model-written summary
Sorghum response was greater with FeHEDTA than FeSO4 across fertilizers.
- Taxon
- Grain sorghumSorghum bicolort0
- Treatment
- FeHEDTAe0
- Outcome
- Crop responsee0
- Direction
- greatere0
- Comparator
- FeSO4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain sorghum”
e0“Crop response was greater with FeHEDTA than with FeSO4, in all fertilizers.”
Claim · model-written summary
Band application of UP cogranulated with FeSO4 was somewhat effective.
- Taxon
- grain sorghumSorghum bicolore0
- Treatment
- urea‐phosphate (UP), an experimental acidic phosphate fertilizer containing urea, cogranulated with FeSO4 (to contain 4% Fe)e0
- Outcome
- somewhat effectivee0
- Direction
- somewhat effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Band application of urea‐phosphate (UP), an experimental acidic phosphate fertilizer containing urea, cogranulated with FeSO4 (to contain 4% Fe) was somewhat effective for grain sorghum.”
Claim · model-written summary
Response to UP-Fe products decreased with water-soluble Fe level and the proportion of total Fe remaining ferrous.
- Taxon
- Grain sorghumSorghum bicolort0
- Treatment
- UP‐Fe productse0
- Outcome
- Crop responsee0
- Direction
- decreasede0
- Qualifier
- level of water‐soluble Fe and percentage of the total Fe remaining in the ferrous forme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Grain sorghum”
e0“Crop response to UP‐Fe products decreased with level of water‐soluble Fe and percentage of the total Fe remaining in the ferrous form.”
The same questions in other papers
iron atom · nutrient: content · Sorghum bicolor (sorghum)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
application · nutrient: content · Sorghum bicolor (sorghum)Positive and negative results
3 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
1 paper more in this group
See all 5 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.