Search claims · PlantClaims

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Manioc yield may decrease at higher rainfall.

Taxon: maniocManihot esculentae0
Outcome: Crop yieldse1
Direction: decreasee0
Qualifier: maye0
Setting: higher rainfall levelse0

Verbatim

e0
“manioc and maize may decrease at higher rainfall levels”
✓ located verbatim in the source · abstract, characters 599–654

e1
“Crop yields show no increase with rainfall”
✓ located verbatim in the source · abstract, characters 550–592

Title

An Ecological Perspective on Human Densities in the Central African Forest

R. F. W. Barnes; S . A. Lahm Journal of Applied Ecology 1997. doi:10.2307/2404862

Other claims from this paper (3)

Association Crop yields did not increase with rainfall.
Association Maize yield may decrease at higher rainfall.
Observation The lowest crop yields occurred in the geological class underlying central African forests.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Maize yield may decrease at higher rainfall.

Taxon: maizeZea mayse0
Outcome: Crop yieldse1
Direction: decreasee0
Qualifier: maye0
Setting: higher rainfall levelse0

Verbatim

e0
“manioc and maize may decrease at higher rainfall levels”
✓ located verbatim in the source · abstract, characters 599–654

e1
“Crop yields show no increase with rainfall”
✓ located verbatim in the source · abstract, characters 550–592

Title

An Ecological Perspective on Human Densities in the Central African Forest

R. F. W. Barnes; S . A. Lahm Journal of Applied Ecology 1997. doi:10.2307/2404862

Other claims from this paper (3)

Association Crop yields did not increase with rainfall.
Association Manioc yield may decrease at higher rainfall.
Observation The lowest crop yields occurred in the geological class underlying central African forests.

Associationauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Species density can be expected to decrease when dry matter production exceeds 6 to 7 t/ha.

Taxon: grasslandse0
Treatment: dry matter productione3
Outcome: Species densitye3
Direction: decreasee3

Verbatim

e0
“The relation between the dry matter production and species density of 27 grasslands with different fertilization histories”
✓ located verbatim in the source · abstract, characters 10–132

e3
“Species density can be expected to decrease when the dry matter production exceeds values of”
✓ located verbatim in the source · abstract, characters 666–758

Title

Yield and species density of grasslands during restoration management

M. J. M. Oomes Journal of Vegetation Science 1992. doi:10.2307/3235690

Other claims from this paper (3)

Observationobservedoriginal resultmeasured

Claim · model-written summary

Seed density decreased another 31% during regeneration.

Taxon: Trifolium balansaeTrifolium balansaet0
Outcome: seed densitye0
Direction: decreasee0
Value: 31%e0
Qualifier: during regeneratione0

Verbatim

e0
“Another 31% decrease in seed density occurred during regeneration.”
✓ located verbatim in the source · abstract, characters 555–621

t0
“Trifolium balansae”
✓ located verbatim in the source · title, characters 23–41

Title

Population Dynamics of Trifolium balansae and T. resupinatum in Self- Regenerating Pasture. I. Seed and Plant Densities and Dry Matter Yield

P. I. Jansen; R. L. Ison Journal of Applied Ecology 1996. doi:10.2307/2404766

Other claims from this paper (11)

Observation Seed bank density peaked after seed production and was lowest during the growing season.
Observation Up to 65% of seed disappeared over the dry summer.
Observation Seed impermeability was highest after production and during growth.
Observation Seed impermeability was lowest before regeneration.
Observation Seedling density reached 10,000 plants per square meter after regeneration.
Observation More than 90% of plants died during the growing season.
Observation Plant density in 1988 was two to three times higher than in 1989 and 1990.
Observation Total dry matter yield did not differ significantly among the tested lines.
Observation Paradana plots had higher clover content than the two SA lines.
Observation Paradana was better suited to the experimental environment than either T. resupinatum line.
Mechanism Plant size and seed production were major contributors to Paradana persistence.

Associationobservedoriginal resultmeasured

Claim · model-written summary

On sandy soils, forb yield decreased with rainfall.

Taxon: forbe0
Outcome: forb yielde0
Direction: decreaseinferrede0
Qualifier: vice-versae0
Setting: soils with high sand contente0

Verbatim

e0
“Grass yield decreased and forb yield increased with increase in rainfall in soils with high clay and silt contents and vice-versa in soils with high sand content”
✓ located verbatim in the source · abstract, characters 542–703

Title

Biomass, protein, fibre and lignin production responses to varying soil texture and precipitation for a humid Nigerian savanna

Joseph Ikechukwu Muoghalu Ecoscience 1996. doi:10.1080/11956860.1996.11682365

Other claims from this paper (5)

Observationobservedoriginal resultpositivesimulated

Claim · model-written summary

More negative covariance between annual survival and relative perennial yield promotes annual-perennial coexistence.

Taxon: annual and perennial speciese0
Outcome: Coexistencee0
Direction: promotede0
Qualifier: covariances between the annual survival and the relative yield of perennialse0

Verbatim

e0
“Coexistence between annual and perennial species is promoted if the covariances between the annual survival and the relative yield of perennials, and between the yields of perennials and annuals, decrease and become more negative.”
✓ located verbatim in the source · abstract, characters 1859–2089

Title

Modelling the Coexistence of Annual and Perennial Plants in Temporally Varying Environments ^*

DAN COHEN Plant Species Biology 1994. doi:10.1111/j.1442-1984.1994.tb00075.x

Other claims from this paper (14)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Adding N and P decreased the proportion of fine grasses.

Taxon: pasture swardst0
Treatment: adding N and Pe3
Outcome: fine grassese3
Direction: decreaseinferrede3

Not reportedComparator

Verbatim

e3
“adding N and P increased the proportion of coarse grass and at the expense of fine grasses”
✓ located verbatim in the source · abstract, characters 1631–1721

t0
“Long-term effects of fertilizer on yield and species composition of contrasting pasture swards”
✓ located verbatim in the source · title, characters 0–94

Title

Long-term effects of fertilizer on yield and species composition of contrasting pasture swards in the Aspen Parkland of the Northern Great Plains

S. Bittman; D. H. McCartney; J. Waddington; et al. Canadian Journal of Plant Science 1997. doi:10.4141/p96-146

Other claims from this paper (17)

Intervention effect All pasture swards responded positively to fertilizer regardless of species composition.
Intervention effect Applying 45 kg N ha−1 increased yield by 0.8 t ha−1.
Intervention effect Applying 90 kg N ha−1 increased yield by 0.7 t ha−1.
Intervention effect Adding 20 kg P ha−1 with N more than doubled the yield increase obtained from N alone.
Intervention effect Nitrogen applied alone did not affect the proportion of bromegrass in the sward.
Intervention effect Nitrogen applied alone increased the proportion of fine grasses in the herbage.
Intervention effect Adding N and P increased the proportion of coarse grass.
Intervention effect Nitrogen decreased the proportion of bromegrass in the sward.
Intervention effect Nitrogen increased the proportion of bluegrass and fescue in the sward.
Intervention effect Application of S increased yield by 0.9 to 1.8 t ha−1.
Intervention effect Application of S greatly increased the proportion of bromegrass at three sites with low soil S.
Intervention effect The residual effect of N and P on yield was small.
Intervention effect The residual effect of N and P on species composition of the herbage was substantial.
Intervention effect S produced a residual increase in yield in 1992.
Intervention effect S produced a large residual effect on species composition.
Recommendation Balanced nutrient application is needed to enhance yield and maintain or improve sward species composition in the Aspen Parkland.
Recommendation Fertilizer can be used to improve yield on a wide range of sward types.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Rust caused yield losses of 6–43% in other slow-rusting faba bean populations.

Taxon: faba beanVicia fabae0
Material: other slow-rusting populationse5
Treatment: artificial inoculatione7
Interactor: Uromyces viciae-fabaeUromyces viciae-fabaee1pathogen
Outcome: yield lossese2
Direction: decreaseinferrede2
Value: 6–43%e5
Comparator: healthy control plotse4

Verbatim

e0
“two faba bean (Vicia faba) cultivars and one susceptible line”
✓ located verbatim in the source · abstract, characters 208–269

e1
“to assess the effect of rust (Uromyces viciae-fabae) on the yield components”
✓ located verbatim in the source · abstract, characters 46–122

e2
“Rust caused yield losses of only 1–2% in the slow-rusting population 2N43”
✓ located verbatim in the source · abstract, characters 828–901

e5
“of 6–43% in other slow-rusting populations”
✓ located verbatim in the source · abstract, characters 969–1011

e4
“healthy control plots were protected from rust by fungicide applications”
✓ located verbatim in the source · abstract, characters 422–494

e7
“Rust epidemics were created by artificial inoculation”
✓ located verbatim in the source · abstract, characters 364–417

Title

The effect of rust on yield of faba bean cultivars and slow-rusting populations

K. Y. Rashid; C. C. Bernier Canadian Journal of Plant Science 1991. doi:10.4141/cjps91-139

Other claims from this paper (7)

Intervention effect In 1983, rust reduced seed yield of faba bean cultivars Diana and Herz Freya by 3.8–6.6%.
Intervention effect In 1984, rust reduced seed yield of faba bean cultivars Diana and Herz Freya by 6.3–9.7%.
Intervention effect In 1983, rust reduced yields of the susceptible faba bean line 2N40 by 67.9%.
Intervention effect In 1984, rust reduced yields of the susceptible faba bean line 2N40 by 49.5%.
Intervention effect Rust caused yield losses of only 1–2% in slow-rusting faba bean population 2N43.
Intervention effect Rust caused yield losses of 1–11% in slow-rusting faba bean populations from Erfordia and Diana.
Association Some slow-rusting faba bean populations are more tolerant to rust than others.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Rust caused yield losses of 1–11% in slow-rusting faba bean populations from Erfordia and Diana.

Taxon: faba beanVicia fabae0
Material: slow-rusting populations from Erfordia and Dianae3
Treatment: artificial inoculatione7
Interactor: Uromyces viciae-fabaeUromyces viciae-fabaee1pathogen
Outcome: yield lossese2
Direction: decreaseinferrede2
Value: 1–11%e3
Comparator: healthy control plotse4

Verbatim

e0
“two faba bean (Vicia faba) cultivars and one susceptible line”
✓ located verbatim in the source · abstract, characters 208–269

e1
“to assess the effect of rust (Uromyces viciae-fabae) on the yield components”
✓ located verbatim in the source · abstract, characters 46–122

e2
“Rust caused yield losses of only 1–2% in the slow-rusting population 2N43”
✓ located verbatim in the source · abstract, characters 828–901

e3
“of 1–11% in slow-rusting populations from Erfordia and Diana”
✓ located verbatim in the source · abstract, characters 903–963

e4
“healthy control plots were protected from rust by fungicide applications”
✓ located verbatim in the source · abstract, characters 422–494

e7
“Rust epidemics were created by artificial inoculation”
✓ located verbatim in the source · abstract, characters 364–417

Title

The effect of rust on yield of faba bean cultivars and slow-rusting populations

K. Y. Rashid; C. C. Bernier Canadian Journal of Plant Science 1991. doi:10.4141/cjps91-139

Other claims from this paper (7)

Intervention effect In 1983, rust reduced seed yield of faba bean cultivars Diana and Herz Freya by 3.8–6.6%.
Intervention effect In 1984, rust reduced seed yield of faba bean cultivars Diana and Herz Freya by 6.3–9.7%.
Intervention effect In 1983, rust reduced yields of the susceptible faba bean line 2N40 by 67.9%.
Intervention effect In 1984, rust reduced yields of the susceptible faba bean line 2N40 by 49.5%.
Intervention effect Rust caused yield losses of only 1–2% in slow-rusting faba bean population 2N43.
Intervention effect Rust caused yield losses of 6–43% in other slow-rusting faba bean populations.
Association Some slow-rusting faba bean populations are more tolerant to rust than others.

Observationobservedoriginal resultpositivesimulated

Claim · model-written summary

More negative covariance between annual and perennial yields promotes coexistence.

Taxon: annual and perennial speciese0
Outcome: Coexistencee0
Direction: promotede0
Qualifier: between the yields of perennials and annualse0

Verbatim

e0
“Coexistence between annual and perennial species is promoted if the covariances between the annual survival and the relative yield of perennials, and between the yields of perennials and annuals, decrease and become more negative.”
✓ located verbatim in the source · abstract, characters 1859–2089

Title

Modelling the Coexistence of Annual and Perennial Plants in Temporally Varying Environments ^*

DAN COHEN Plant Species Biology 1994. doi:10.1111/j.1442-1984.1994.tb00075.x

Other claims from this paper (14)

“yield decrease”

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