Abstract
Abstract Ferrous‐and ferric‐sulfate was banded alone or with phosphate fertilizers [urea phosphate (10–30–0), urea sulfate phosphate (10–30–0‐7S), diammonium phosphate (DAP), and mono calcium phosphate (MCP) in an Fe‐deficient soil in a greenhouse experiment The Fe rates were 0, 25, and 50 mg/kg, and P rates were 0 and 50 mg/kg. Dry matter yield and nutrient uptake by sorghum plants were measured and the residual effects were determined on a second crop. The Fe application alone had little effect, but when banded together with P fertilizers, it more effectively increased dry matter yield, and the uptake of Fe, Mn, and Zn. Addition of P fertilizers with FeSO4 increased the DTPA‐extractable soil Fe in the following order: DAP>10–30–0 >10–30–0‐7S>MCP. The addition of P fertilizers also increased NaHCO3‐extractable soil P, but decreased the DTPA extractable soil Mn and Zn. The ferrous‐Fe source generally was more effective than was the ferric‐Fe source. Ferrous and ferric sulfate availability was enhanced by banding with P fertilizers.
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Claims 7
Claim · model-written summary
Iron alone had little effect on sorghum outcomes.
- Treatment
- Fe application alonee0
- Outcome
- Dry matter yield and nutrient uptakee1
- Direction
- little effecte0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Fe application alone had little effect”
e1“Dry matter yield and nutrient uptake by sorghum plants were measured”
Claim · model-written summary
Banded iron with phosphate fertilizer increased sorghum dry matter yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when banded together with P fertilizers, it more effectively increased dry matter yield, and the uptake of Fe, Mn, and Zn.”
e1“sorghum plants”
Claim · model-written summary
Banded iron with phosphate fertilizer increased sorghum uptake of Fe, Mn, and Zn.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when banded together with P fertilizers, it more effectively increased dry matter yield, and the uptake of Fe, Mn, and Zn.”
e1“sorghum plants”
Claim · model-written summary
Phosphate fertilizer with FeSO4 increased extractable soil iron, ranked DAP highest and MCP lowest.
- Treatment
- P fertilizers with FeSO4e0
- Outcome
- DTPA‐extractable soil Fee0
- Direction
- increasede0
- Qualifier
- DAP>10–30–0 >10–30–0‐7S>MCPe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of P fertilizers with FeSO4 increased the DTPA‐extractable soil Fe in the following order: DAP>10–30–0 >10–30–0‐7S>MCP.”
e1“sorghum plants”
Claim · model-written summary
Phosphate fertilizer increased extractable soil phosphorus.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of P fertilizers also increased NaHCO3‐extractable soil P”
e1“sorghum plants”
Claim · model-written summary
Phosphate fertilizer decreased extractable soil manganese and zinc.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of P fertilizers also increased NaHCO3‐extractable soil P, but decreased the DTPA extractable soil Mn and Zn.”
e1“sorghum plants”
Claim · model-written summary
Ferrous iron was generally more effective than ferric iron.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ferrous‐Fe source generally was more effective than was the ferric‐Fe source.”
e1“sorghum plants”
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