Abstract
Abstract Manganese deficiency on certain Indiana soils may be corrected by adding sulfur. When elemental sulfur is added to the soil, three important changes take place: an oxidation‐reduction reaction, an increase in the sulfate ion concentration, and a pH change. The purpose of this investigation was to determine the importance of each of these factors in increasing manganese availability. Chemicals which would theoretically produce these three actions singly and in all possible combinations were added in equivalent amounts to a Maumee sandy loam soil having pH levels of 6.0, 6.5, and 7.5. This soil had previously shown severe manganese deficiency at the two higher pH levels. The chemicals used were elemental sulfur, sulfuric acid, hydrochloric acid, sodium thiosulfate, sugar, magnesium sulfate, and ammonium chloride. Soybeans were grown as the indicator crop. Relationship between the yield and manganese content of the soybeans and the treatments were obtained under these conditions. The treatments including sulfur oxidation gave yields and manganese contents above that which could be attributed to pH change. Treatments causing a pH change benefited the crop in proportion to the pH change. The presence of sulfate alone gave no effect.
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Claims 4
Claim · model-written summary
Sulfur oxidation treatments raised soybean yield beyond what pH change could explain.
- Taxon
- Soybeans
Glycine maxe0 - Treatment
- sulfur oxidatione1
- Outcome
- yieldse1
- Direction
- abovee1
- Comparator
- pH changee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans were grown as the indicator crop.”
e1“The treatments including sulfur oxidation gave yields and manganese contents above that which could be attributed to pH change.”
Claim · model-written summary
Sulfur oxidation treatments raised soybean manganese content beyond what pH change could explain.
- Taxon
- SoybeansGlycine maxe0
- Treatment
- sulfur oxidatione1
- Outcome
- manganese contentse1
- Direction
- abovee1
- Comparator
- pH changee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans were grown as the indicator crop.”
e1“The treatments including sulfur oxidation gave yields and manganese contents above that which could be attributed to pH change.”
Claim · model-written summary
Treatments causing a pH change benefited soybeans in proportion to the change.
- Taxon
- SoybeansGlycine maxe0
- Treatment
- Treatments causing a pH changee1
- Outcome
- benefited the crope1
- Direction
- benefitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans were grown as the indicator crop.”
e1“Treatments causing a pH change benefited the crop in proportion to the pH change.”
Claim · model-written summary
Sulfate alone had no effect on the soybean crop.
- Taxon
- SoybeansGlycine maxe0
- Treatment
- sulfate alonee1
- Outcome
- no effecte1
- Direction
- no effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybeans were grown as the indicator crop.”
e1“The presence of sulfate alone gave no effect.”
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See all 36 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.