Abstract
Acetylene reduction in fababeans (Vicia faba L.) was significantly greater than in peas (Pisum sativum L.) and black beans (Phaseolus vulgaris L.) in 1977, and peas and soybeans (Glycine max L.) in 1978. More than 90% of fababean, pea and soybean plants bore nodules, but only 77% of black beans. The addition of 20 kg N/ha as ammonium nitrate depressed nodulation in all species in 1977, especially black beans. Acetylene reduction was also depressed in all species. Results in 1978 on a higher nitrate soil were more variable, though a marked decrease in acetylene reduction in peas due to fertilizer N was again recorded. Of the four species, only fababeans regrew after maturity; acetylene reduction was detected until 20 Oct. 1978. In spite of low fixation rates, black beans yielded significantly more dry matter and N than fababeans and peas. N fertilizer produced significant increases in dry matter in all species except fababeans. N yield was significantly increased by fertilizer in soybeans.
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Claims 13
Claim · model-written summary
Fababeans had greater acetylene reduction than peas and black beans in 1977.
- Taxon
- fababeans
Vicia fabae0 - Outcome
- Acetylene reductione0
- Direction
- greatere0
- Qualifier
- in 1977e0
- Comparator
- peas (Pisum sativum L.) and black beans (Phaseolus vulgaris L.)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Acetylene reduction in fababeans (Vicia faba L.) was significantly greater than in peas (Pisum sativum L.) and black beans (Phaseolus vulgaris L.) in 1977”
Claim · model-written summary
Fababeans had greater acetylene reduction than peas and soybeans in 1978.
- Taxon
- fababeansVicia fabae1
- Outcome
- Acetylene reductione1
- Direction
- greatere1
- Qualifier
- in 1978e0
- Comparator
- peas and soybeans (Glycine max L.)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“and peas and soybeans (Glycine max L.) in 1978”
e1“Acetylene reduction in fababeans (Vicia faba L.) was significantly greater than in peas”
Claim · model-written summary
More than 90% of fababean, pea and soybean plants bore nodules.
- Taxon
- fababean, pea and soybean plants
Glycine max
Lathyrus oleraceusVicia fabae0 - Outcome
- bore nodulese0
- Value
- More than 90%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More than 90% of fababean, pea and soybean plants bore nodules”
Claim · model-written summary
Only 77% of black beans bore nodules.
Verbatim
e0“but only 77% of black beans”
e1“plants bore nodules”
Claim · model-written summary
Ammonium nitrate depressed nodulation in all species in 1977, especially black beans.
- Taxon
- black beanse0
- Treatment
- 20 kg N/ha as ammonium nitratee0
- Outcome
- nodulatione0
- Direction
- depressede0
- Qualifier
- in all species in 1977, especially black beanse0
Not reportedComparator
Verbatim
e0“The addition of 20 kg N/ha as ammonium nitrate depressed nodulation in all species in 1977, especially black beans”
Claim · model-written summary
Nitrogen fertilizer depressed acetylene reduction in all species.
- Taxon
- all speciese0
- Treatment
- 20 kg N/ha as ammonium nitratee1
- Outcome
- Acetylene reductione0
- Direction
- depressede0
Not reportedComparator
Verbatim
e0“Acetylene reduction was also depressed in all species”
e1“The addition of 20 kg N/ha as ammonium nitrate”
Claim · model-written summary
Fertilizer nitrogen markedly decreased acetylene reduction in peas in 1978.
- Taxon
- peasLathyrus oleraceuse0
- Treatment
- fertilizer Ne0
- Outcome
- acetylene reductione0
- Direction
- decreasee0
- Qualifier
- in 1978 on a higher nitrate soile1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a marked decrease in acetylene reduction in peas due to fertilizer N was again recorded”
e1“Results in 1978 on a higher nitrate soil were more variable”
Claim · model-written summary
Only fababeans regrew after maturity.
- Taxon
- fababeansVicia fabae0
- Outcome
- regrew after maturitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Of the four species, only fababeans regrew after maturity”
Claim · model-written summary
Acetylene reduction in fababeans was detected until 20 Oct. 1978.
- Taxon
- fababeansVicia fabae0
- Outcome
- acetylene reductione0
- Qualifier
- until 20 Oct. 1978e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only fababeans regrew after maturity; acetylene reduction was detected until 20 Oct. 1978”
Claim · model-written summary
Black beans yielded more dry matter than fababeans and peas.
Verbatim
e0“black beans yielded significantly more dry matter and N than fababeans and peas”
Claim · model-written summary
Black beans yielded more nitrogen than fababeans and peas.
Verbatim
e0“black beans yielded significantly more dry matter and N than fababeans and peas”
Claim · model-written summary
Nitrogen fertilizer increased dry matter in all species except fababeans.
Not reportedComparator
Verbatim
e0“N fertilizer produced significant increases in dry matter in all species except fababeans”
Claim · model-written summary
Fertilizer significantly increased nitrogen yield in soybeans.
- Taxon
- soybeansGlycine maxe0
- Treatment
- fertilizere0
- Outcome
- N yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N yield was significantly increased by fertilizer in soybeans”
The same questions in other papers
fertilization · symbiosis · Lathyrus oleraceus (pea)Positive and negative results
5 papers in the same direction as this paper · 18 in the opposite direction
- positive
- positive
- positive
20 papers more in this group
See all 24 papers →fertilization · yield · Glycine max (soybean)Positive and negative results
1,020 papers in the same direction as this paper · 155 in the opposite direction · 16 reporting no difference from an alternative
- positive
- no effect
- no effect
1,188 papers more in this group
See all 1,192 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.