Abstract
Greenhouse and field experiments were conducted to study the effect of potassium (K) salts on chlorosis in soybeans, and the influence of these salts on selected soil properties. Chlorosis ratings, chlorophyll measurements of soybean leaves and HCO$\sbsp{3}{-}$ of soil saturation extracts were influenced by the companion anions of soil applied potassium (K) salts. (1) The Cl$\sp-$, NO$\sbsp{3}{-}$, and SO$\sb4\sp{2-}$ anions of K reduced visual chlorosis ratings and reduced HCO$\sbsp{3}{-}$ in soil solution. On the other hand, the HPO$\sb4\sp{2-}$ and HCO$\sbsp{3}{-}$ anions increased visual chlorosis ratings, decreased chlorophyll content and enhanced HCO$\sbsp{3}{-}$ levels in soil solution. (2) Soybean seed yields were directly related to chlorophyll concentration of leaves. (3) Chlorophyll concentration of soybean leaves increased with an increase in leaf sulfur concentration. (4) Application of Fe-EDDHA did not affect any of the measured soil variables nor plant nutrient content, but was associated with a 2 to 4-fold increase in leaf chlorophyll concentration. The Fe-EDDHA may therefore affect the mechanism of chlorophyll biosynthesis. (5) Cation/anion ratios in plants ranged from 4.5 to 8.5. Increases in the cation/anion ratios were related to decreases in leaf chlorophyll.
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Claims 12
Claim · model-written summary
Cl, NO3 and SO4 anions of soil-applied potassium salts reduced visual chlorosis ratings in soybeans.
- Taxon
- soybeans
Glycine maxt0 - Treatment
- anions of Ke1
- Outcome
- visual chlorosis ratingse1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The Cl$\sp-$, NO$\sbsp{3}{-}$, and SO$\sb4\sp{2-}$ anions of K reduced visual chlorosis ratings and reduced HCO$\sbsp{3}{-}$ in soil solution”
t0“chlorosis in soybeans”
Claim · model-written summary
Cl, NO3 and SO4 anions of soil-applied potassium salts reduced HCO3 in soil solution.
- Taxon
- soybeansGlycine maxt0
- Treatment
- anions of Ke1
- Outcome
- HCO$\sbsp{3}{-}$ in soil solutione1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The Cl$\sp-$, NO$\sbsp{3}{-}$, and SO$\sb4\sp{2-}$ anions of K reduced visual chlorosis ratings and reduced HCO$\sbsp{3}{-}$ in soil solution”
t0“chlorosis in soybeans”
Claim · model-written summary
HPO4 and HCO3 anions of potassium salts increased visual chlorosis ratings in soybeans.
- Taxon
- soybeansGlycine maxt0
- Treatment
- HPO$\sb4\sp{2-}$ and HCO$\sbsp{3}{-}$ anionse2
- Outcome
- visual chlorosis ratingse2
- Direction
- increasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“On the other hand, the HPO$\sb4\sp{2-}$ and HCO$\sbsp{3}{-}$ anions increased visual chlorosis ratings, decreased chlorophyll content and enhanced HCO$\sbsp{3}{-}$ levels in soil solution”
t0“chlorosis in soybeans”
Claim · model-written summary
HPO4 and HCO3 anions of potassium salts decreased chlorophyll content in soybeans.
- Taxon
- soybeansGlycine maxt0
- Treatment
- HPO$\sb4\sp{2-}$ and HCO$\sbsp{3}{-}$ anionse2
- Outcome
- chlorophyll contente2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“On the other hand, the HPO$\sb4\sp{2-}$ and HCO$\sbsp{3}{-}$ anions increased visual chlorosis ratings, decreased chlorophyll content and enhanced HCO$\sbsp{3}{-}$ levels in soil solution”
t0“chlorosis in soybeans”
Claim · model-written summary
HPO4 and HCO3 anions of potassium salts enhanced HCO3 levels in soil solution.
- Taxon
- soybeansGlycine maxt0
- Treatment
- HPO$\sb4\sp{2-}$ and HCO$\sbsp{3}{-}$ anionse2
- Outcome
- HCO$\sbsp{3}{-}$ levels in soil solutione2
- Direction
- enhancede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“On the other hand, the HPO$\sb4\sp{2-}$ and HCO$\sbsp{3}{-}$ anions increased visual chlorosis ratings, decreased chlorophyll content and enhanced HCO$\sbsp{3}{-}$ levels in soil solution”
t0“chlorosis in soybeans”
Claim · model-written summary
Soybean seed yields were directly related to chlorophyll concentration of leaves.
- Taxon
- SoybeanGlycine maxe3
- Organ / stage
- leavese3
- Outcome
- seed yieldse3
- Direction
- increaseinferrede3
- Qualifier
- chlorophyll concentration of leavese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Soybean seed yields were directly related to chlorophyll concentration of leaves”
t0“chlorosis in soybeans”
Claim · model-written summary
Chlorophyll concentration of soybean leaves increased with increasing leaf sulfur concentration.
- Taxon
- soybeanGlycine maxe4
- Organ / stage
- leavese4
- Compound
- sulfure4
- Outcome
- Chlorophyll concentratione4
- Direction
- increasede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Chlorophyll concentration of soybean leaves increased with an increase in leaf sulfur concentration”
t0“chlorosis in soybeans”
Claim · model-written summary
Application of Fe-EDDHA did not affect the measured soil variables or plant nutrient content of soybeans.
- Taxon
- soybeansGlycine maxt0
- Treatment
- Application of Fe-EDDHAe5
- Outcome
- measured soil variables nor plant nutrient contente5
- Direction
- did not affecte5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Application of Fe-EDDHA did not affect any of the measured soil variables nor plant nutrient content, but was associated with a 2 to 4-fold increase in leaf chlorophyll concentration”
t0“chlorosis in soybeans”
Claim · model-written summary
Application of Fe-EDDHA was associated with a 2 to 4-fold increase in leaf chlorophyll concentration of soybeans.
- Taxon
- soybeansGlycine maxt0
- Treatment
- Application of Fe-EDDHAe5
- Outcome
- leaf chlorophyll concentratione5
- Direction
- increasee5
- Value
- 2 to 4-folde5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Application of Fe-EDDHA did not affect any of the measured soil variables nor plant nutrient content, but was associated with a 2 to 4-fold increase in leaf chlorophyll concentration”
t0“chlorosis in soybeans”
Claim · model-written summary
Fe-EDDHA may affect the mechanism of chlorophyll biosynthesis in soybeans.
- Taxon
- soybeansGlycine maxt0
- Treatment
- Fe-EDDHAe6
- Outcome
- chlorophyll biosynthesise6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The Fe-EDDHA may therefore affect the mechanism of chlorophyll biosynthesis”
t0“chlorosis in soybeans”
Claim · model-written summary
Cation/anion ratios in soybean plants ranged from 4.5 to 8.5.
- Taxon
- soybeansGlycine maxt0
- Outcome
- Cation/anion ratios in plantse7
- Value
- 4.5 to 8.5e7
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Cation/anion ratios in plants ranged from 4.5 to 8.5”
t0“chlorosis in soybeans”
Claim · model-written summary
Increases in cation/anion ratios were related to decreases in leaf chlorophyll of soybeans.
- Taxon
- soybeansGlycine maxt0
- Compound
- cation/anion ratiose1
- Outcome
- leaf chlorophylle1
- Direction
- decreasese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Increases in the cation/anion ratios were related to decreases in leaf chlorophyll”
t0“chlorosis in soybeans”
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