Abstract
Abstract Nitrification was inhibited in soils treated with fumigants, resulting in the accumulation of ammonium. A study was made of the effects of this reduced form of nitrogen on the growth of soybeans. Soybeans were grown in sterile nutrient cultures and were supplied nitrogen in the form of nitrate, ammonium, or amino acids at varying levels of calcium. The plants receiving ammonium had a higher content of protein and matured earlier but did not produce as much vegetative growth. High calcium levels in the nutrient solution resulted in the best plant growth where the source of nitrogen was ammonium. The total mineral cation uptake was lower in the ammonium‐supplied plants than in those supplied with nitrate indicating that ammonium enters into the cation balance. Soybeans grown on soils fumigated with Dowfumes N, W‐40, and MC‐2 responded favorably to high levels of calcium. The plants grew rapidly and had a high protein content although the total mineral cation uptake was less than that of the untreated soils. A high level of calcium is necessary where ammonium is the source of nitrogen.
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Claims 11
Claim · model-written summary
Nitrification was inhibited in fumigated soils, resulting in accumulation of ammonium.
- Taxon
- Soybeans
Glycine maxt0 - Outcome
- Nitrificatione1
- Direction
- inhibitede1
- Qualifier
- resulting in the accumulation of ammoniume1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e1“Nitrification was inhibited in soils treated with fumigants, resulting in the accumulation of ammonium”
Claim · model-written summary
Plants receiving ammonium had a higher protein content.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- ammoniume3
- Outcome
- content of proteine3
- Direction
- highere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e3“The plants receiving ammonium had a higher content of protein and matured earlier but did not produce as much vegetative growth”
Claim · model-written summary
Plants receiving ammonium matured earlier.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- ammoniume3
- Outcome
- maturede3
- Direction
- earliere3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e3“The plants receiving ammonium had a higher content of protein and matured earlier but did not produce as much vegetative growth”
Claim · model-written summary
Plants receiving ammonium did not produce as much vegetative growth.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- ammoniume3
- Outcome
- vegetative growthe3
- Direction
- did not produce as muche3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e3“The plants receiving ammonium had a higher content of protein and matured earlier but did not produce as much vegetative growth”
Claim · model-written summary
High calcium levels gave the best plant growth where ammonium was the nitrogen source.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- High calcium levels in the nutrient solutione4
- Outcome
- plant growthe4
- Direction
- beste4
- Comparator
- varying levels of calciume2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e2“Soybeans were grown in sterile nutrient cultures and were supplied nitrogen in the form of nitrate, ammonium, or amino acids at varying levels of calcium”
e4“High calcium levels in the nutrient solution resulted in the best plant growth where the source of nitrogen was ammonium”
Claim · model-written summary
Ammonium-supplied plants had lower total mineral cation uptake than nitrate-supplied plants.
- Taxon
- SoybeansGlycine maxt0
- Treatment
- ammoniume3
- Outcome
- total mineral cation uptakee5
- Direction
- lowere5
- Comparator
- nitratee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e3“The plants receiving ammonium had a higher content of protein and matured earlier but did not produce as much vegetative growth”
e5“The total mineral cation uptake was lower”
e6“than in those supplied with nitrate indicating”
Claim · model-written summary
Soybeans on fumigated soils responded favorably to high calcium levels.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- respondede7
- Direction
- favorablye7
- Qualifier
- to high levels of calciume7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e7“responded favorably to high levels of calcium”
Claim · model-written summary
Soybeans on fumigated soils grew rapidly.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- grew rapidlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e1“The plants grew rapidly and had a high protein content”
Claim · model-written summary
Soybeans on fumigated soils had a high protein content.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- protein contente1
- Direction
- highe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e1“The plants grew rapidly and had a high protein content”
Claim · model-written summary
Total mineral cation uptake on fumigated soils was less than on untreated soils.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- total mineral cation uptakee1
- Direction
- lesse1
- Comparator
- untreated soilse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e1“although the total mineral cation uptake was less than that of the untreated soils”
Claim · model-written summary
A high level of calcium is necessary where ammonium is the nitrogen source.
- Taxon
- SoybeansGlycine maxt0
- Outcome
- high level of calciume1
- Qualifier
- where ammonium is the source of nitrogene1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Growth of Soybeans Supplied with Ammonium Nitrogen”
e1“A high level of calcium is necessary where ammonium is the source of nitrogen”
The same questions in other papers
calcium atom · growth · Glycine max (soybean)Results differ
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- no effect
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358 papers in the same direction as this paper · 56 in the opposite direction · 3 reporting no difference from an alternative
- negative
- negative
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See all 418 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.