Abstract
Summary. Legumes have become common rotation crops in cotton cropping systems in northern New South Wales. Levels of nitrogen fixation and yield achieved on-farm were measured in commercial faba beans and other winter and summer legume crops sown after cotton over 3 years to assess the relative inputs of fixed nitrogen (N) into this system. Faba bean crops fixed up to 350 kg N/ha, removed up to 160 kg N/ha in harvested grain and contributed up to 270 kg fixed N/ha to soil N after harvest. Grain yields, N2 fixation and dry matter production were reduced in late-sown crops and those water-stressed during pod-filling, but most faba bean crops fixed almost 3 times as much N as was removed in grain. Below-ground legume N, determined with 15N shoot feeding techniques, accounted for 40% of the total crop N at peak biomass, or about 100 kg N/ha for the average faba bean crops. Residual fixed N after harvest was predicted from crop dry matter and grain yield, and this could be used to assess the contribution to soil N from faba beans. Amounts of nitrogen fixed by other legume crops ranged from 20 kg N/ha for adzuki bean and droughted lablab to more than 450 kg N/ha by irrigated soybean. Soybean, peanut and Dolichos lablab contributed more fixed N to the soil than adzuki bean, mung bean or pigeon pea under irrigated conditions. Winter crops including field peas, lentils and lupins and green-manured pasture species fixed up to 240 kg N/ha.
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Claims 19
Claim · model-written summary
Faba bean crops fixed up to 350 kg N/ha.
- Taxon
- Faba bean
Vicia fabae0 - Outcome
- fixede0
- Value
- 350 kg N/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Faba bean crops fixed up to 350 kg N/ha”
Claim · model-written summary
Faba bean crops removed up to 160 kg N/ha in harvested grain.
- Taxon
- Faba beanVicia fabae1
- Organ / stage
- harvested graine0
- Outcome
- removede0
- Value
- 160 kg N/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“removed up to 160 kg N/ha in harvested grain”
e1“Faba bean crops”
Claim · model-written summary
Faba bean crops contributed up to 270 kg fixed N/ha to soil after harvest.
- Taxon
- Faba beanVicia fabae1
- Outcome
- contributede0
- Value
- 270 kg fixed N/hae0
- Qualifier
- after harveste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“contributed up to 270 kg fixed N/ha to soil N after harvest”
e1“Faba bean crops”
Claim · model-written summary
Late sowing reduced faba bean grain yield, nitrogen fixation and dry matter production.
- Taxon
- faba beanVicia fabae1
- Treatment
- late-sowne0
- Outcome
- Grain yields, N2 fixation and dry matter productione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields, N2 fixation and dry matter production were reduced in late-sown crops”
e1“most faba bean crops fixed almost 3 times as much N”
Claim · model-written summary
Water stress during pod filling reduced faba bean grain yield, nitrogen fixation and dry matter production.
- Taxon
- faba beanVicia fabae1
- Treatment
- water-stressed during pod-fillinge0
- Outcome
- Grain yields, N2 fixation and dry matter productione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain yields, N2 fixation and dry matter production were reduced in late-sown crops and those water-stressed during pod-filling”
e1“most faba bean crops fixed almost 3 times as much N”
Claim · model-written summary
Most faba bean crops fixed nearly three times the nitrogen removed in grain.
- Taxon
- faba beanVicia fabae0
- Outcome
- fixede0
- Direction
- almost 3 times as muche0
- Value
- 3 timese0
- Comparator
- N as was removed in graine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most faba bean crops fixed almost 3 times as much N as was removed in grain”
Claim · model-written summary
Belowground legume nitrogen was 40% of total crop nitrogen at peak biomass.
Verbatim
e0“Below-ground legume N, determined with 15N shoot feeding techniques, accounted for 40% of the total crop N at peak biomass”
Claim · model-written summary
Belowground nitrogen was about 100 kg N/ha for average faba bean crops.
- Taxon
- faba beanVicia fabae0
- Outcome
- Below-ground legume Ne1
- Value
- 100 kg N/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“about 100 kg N/ha for the average faba bean crops”
e1“Below-ground legume N”
Claim · model-written summary
Residual fixed nitrogen after harvest could be predicted from crop dry matter and grain yield.
- Taxon
- faba beansVicia fabae1
- Outcome
- Residual fixed N after harveste0
- Comparator
- crop dry matter and grain yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Residual fixed N after harvest was predicted from crop dry matter and grain yield”
e1“contribution to soil N from faba beans”
Claim · model-written summary
Adzuki bean fixed 20 kg N/ha.
- Taxon
- adzuki bean
Vigna angularise0 - Outcome
- nitrogen fixede1
- Value
- 20 kg N/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 kg N/ha for adzuki bean”
e1“Amounts of nitrogen fixed”
Claim · model-written summary
Droughted lablab fixed 20 kg N/ha.
LablabOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“20 kg N/ha for adzuki bean and droughted lablab”
e1“Amounts of nitrogen fixed”
Claim · model-written summary
Irrigated soybean fixed more than 450 kg N/ha.
- Taxon
- soybean
Glycine maxe0 - Outcome
- nitrogen fixede1
- Value
- 450 kg N/hae0
- Qualifier
- irrigatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more than 450 kg N/ha by irrigated soybean”
e1“Amounts of nitrogen fixed”
Claim · model-written summary
Soybean contributed more fixed nitrogen to soil than adzuki bean, mung bean or pigeon pea under irrigation.
- Taxon
- SoybeanGlycine maxe0
- Outcome
- fixed N to the soile0
- Direction
- moree0
- Comparator
- adzuki bean, mung bean or pigeon peae0
- Setting
- irrigated conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean, peanut and Dolichos lablab contributed more fixed N to the soil than adzuki bean, mung bean or pigeon pea under irrigated conditions.”
Claim · model-written summary
Peanut contributed more fixed nitrogen to soil than adzuki bean, mung bean or pigeon pea under irrigation.
- Taxon
- peanut
Arachis hypogaeae0 - Outcome
- fixed N to the soile0
- Direction
- moree0
- Comparator
- adzuki bean, mung bean or pigeon peae0
- Setting
- irrigated conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean, peanut and Dolichos lablab contributed more fixed N to the soil than adzuki bean, mung bean or pigeon pea under irrigated conditions.”
Claim · model-written summary
Dolichos lablab contributed more fixed nitrogen to soil than adzuki bean, mung bean or pigeon pea under irrigation.
- Taxon
- Dolichos lablab
Lablab purpureuse0 - Outcome
- fixed N to the soile0
- Direction
- moree0
- Comparator
- adzuki bean, mung bean or pigeon peae0
- Setting
- irrigated conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soybean, peanut and Dolichos lablab contributed more fixed N to the soil than adzuki bean, mung bean or pigeon pea under irrigated conditions.”
Claim · model-written summary
Field peas fixed up to 240 kg N/ha.
Verbatim
e0“Winter crops including field peas, lentils and lupins and green-manured pasture species fixed up to 240 kg N/ha.”
Claim · model-written summary
Lentils fixed up to 240 kg N/ha.
- Taxon
- lentils
Lens culinarise0 - Outcome
- fixede0
- Value
- 240 kg N/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter crops including field peas, lentils and lupins and green-manured pasture species fixed up to 240 kg N/ha.”
Claim · model-written summary
Lupins fixed up to 240 kg N/ha.
LupinusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Winter crops including field peas, lentils and lupins and green-manured pasture species fixed up to 240 kg N/ha.”
Claim · model-written summary
Green-manured pasture species fixed up to 240 kg N/ha.
Verbatim
e0“Winter crops including field peas, lentils and lupins and green-manured pasture species fixed up to 240 kg N/ha.”
The same questions in other papers
drought · symbiosis · Vicia faba (faba bean)Results agree
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- negative
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See all 7 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.