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“yield decrease”

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Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The AT‐I line had a yield decrease of more than 80% at 30 μM aluminum.

Taxon: L. corniculatusLotus corniculatuse0
Material: AT‐Ie0
Treatment: 30 μM Ale0
Outcome: yielde0
Direction: decreasede0
Value: > 80 %e0

Not reportedComparator

Verbatim

e0
“the yield of Maitland was decreased by > 80 % at 30 μM Al, as was that of the other two L. corniculatus lines tested, AT‐I and AT‐U”
✓ located verbatim in the source · abstract, characters 553–684

Title

Variation in aluminum tolerance among and withinlotuslines

F.P.C. Blamey; D.M. Wheeler; R.A. Christie; et al. Journal of Plant Nutrition 1990. doi:10.1080/01904169009364113

Other claims from this paper (6)

Intervention effect Grasslands Maku dry mass increased by more than 40% with 10 to 30 μM monomeric aluminum.
Intervention effect Maitland yield fell by more than 80% at 30 μM aluminum.
Intervention effect The AT‐U line had a yield decrease of more than 80% at 30 μM aluminum.
Observation The interspecific F1 G4712 had intermediate aluminum tolerance.
Observation The interspecific F2 showed a wide range of aluminum responses and morphology similar to Maitland.
Recommendation The authors infer benefit from selecting aluminum tolerance and agronomic traits in this interspecific cross.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The AT‐U line had a yield decrease of more than 80% at 30 μM aluminum.

Taxon: L. corniculatusLotus corniculatuse0
Material: AT‐Ue0
Treatment: 30 μM Ale0
Outcome: yielde0
Direction: decreasede0
Value: > 80 %e0

Not reportedComparator

Verbatim

e0
“the yield of Maitland was decreased by > 80 % at 30 μM Al, as was that of the other two L. corniculatus lines tested, AT‐I and AT‐U”
✓ located verbatim in the source · abstract, characters 553–684

Title

Variation in aluminum tolerance among and withinlotuslines

F.P.C. Blamey; D.M. Wheeler; R.A. Christie; et al. Journal of Plant Nutrition 1990. doi:10.1080/01904169009364113

Other claims from this paper (6)

Intervention effect Grasslands Maku dry mass increased by more than 40% with 10 to 30 μM monomeric aluminum.
Intervention effect Maitland yield fell by more than 80% at 30 μM aluminum.
Intervention effect The AT‐I line had a yield decrease of more than 80% at 30 μM aluminum.
Observation The interspecific F1 G4712 had intermediate aluminum tolerance.
Observation The interspecific F2 showed a wide range of aluminum responses and morphology similar to Maitland.
Recommendation The authors infer benefit from selecting aluminum tolerance and agronomic traits in this interspecific cross.

Mechanismhypothesisoriginal resultpositivemeasured

Claim · model-written summary

PGRs may decrease N leaching at high N rates by improving N uptake by grain or seeds, if yield is improved

Taxon: spring sown cropst0
Treatment: PGRse0
Outcome: N leachinge0
Qualifier: by improving N uptake by grain/seeds, if the yield is improvede0

Verbatim

e0
“The data suggest that PGRs may decrease some N leaching at high N rates by improving N uptake by grain/seeds, if the yield is improved”
✓ located verbatim in the source · abstract, characters 783–917

t0
“spring sown crops”
✓ located verbatim in the source · title, characters 32–49

Title

Responses of yield and N use of spring sown crops to N fertilization, with special reference to the use of plant growth regulators

L. PIETOLA; R. TANNI; P. ELONEN Agricultural and Food Science 1999. doi:10.23986/afsci.5639

Other claims from this paper (6)

Intervention effect PGR effectively shortened the plant height of spring wheat
Intervention effect PGR increased spring wheat grain yield only in 1995
Intervention effect N yield of wheat grains was not increased by PGR treatment
Intervention effect Response of fodder barley to PGR was insignificant or even negative in 1995
Intervention effect Seed and N yields of oilseed rape were most frequently improved by recommended use of PGR
Intervention effect After a favourable season of high yields, N rates did not significantly affect soil mineral N contents

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Increasing plant density reduced cottonseed yield per hectare.

Taxon: cottonGossypium hirsutumt0
Treatment: plant densitye0
Outcome: cottonseed yield/hae0
Direction: decreasee0

Not reportedComparator

Verbatim

t0
“cottonseed yield and quality”
✓ located verbatim in the source · title, characters 77–105

e0
“As plant density increased, there was a decrease in cottonseed yield/ha”
✓ located verbatim in the source · abstract, characters 209–280

Title

Effect of plant population densities and application of growth retardants on cottonseed yield and quality

Zakaria M. Sawan; Ahmad E. Basyony; Willis L. McCuistion; et al. Journal of the American Oil Chemists Society 1993. doi:10.1007/bf02545314

Other claims from this paper (19)

Intervention effect Increasing plant density reduced seed index and protein content.
Intervention effect Increasing plant density reduced oil and protein yields per hectare.
Intervention effect Increasing plant density reduced oil refractive index, iodine value and unsaponifiable matter.
Intervention effect Increasing plant density reduced unsaturated fatty acids.
Intervention effect Increasing plant density raised oil acid and saponification values.
Intervention effect Increasing plant density raised saturated fatty acids.
Intervention effect Cycocel increased cottonseed yield and seed index.
Intervention effect Alar increased cottonseed yield and seed index.
Intervention effect Cycocel increased seed protein content and oil and protein yield.
Intervention effect Alar increased seed protein content and oil and protein yield.
Intervention effect Cycocel increased oil refractive index, iodine value and unsaponifiable matter.
Intervention effect Alar increased oil refractive index, iodine value and unsaponifiable matter.
Intervention effect Cycocel increased unsaturated fatty acids and reduced oil acid and saponification values.
Intervention effect Alar increased unsaturated fatty acids.
Intervention effect Oil acid and saponification values decreased with growth retardant application.
Association Cottonseed yield did not differ among application rates of either chemical.
Intervention effect Cycocel at 750 ppm produced the highest oil and protein yield per hectare, followed by Alar at 250 ppm.
Intervention effect Cycocel at 250 ppm gave the highest refractive index and unsaponifiable matter and the lowest acid value.
Intervention effect Alar at 250 ppm gave the highest iodine value and lowest saponification value.

Observationobservedoriginal resultmeasured

Claim · model-written summary

On chemical fallow, yield declined only after mid-October seeding.

Taxon: winter wheatTriticum aestivumt0
Outcome: grain yielde0
Direction: did not decreasee0
Qualifier: mid‐Octobere0

Verbatim

e0
“grain yield did not decrease until seeding was delayed to mid‐October”
✓ located verbatim in the source · abstract, characters 1248–1317

t0
“winter wheat”
✓ located after whitespace/quote normalisation · title, characters 25–37

Title

Optimum Seeding Date for Winter Wheat in Southwestern Saskatchewan

J.G. McLeod; C.A. Campbell; F.B. Dyck; et al. Agronomy Journal 1992. doi:10.2134/agronj1992.00021962008400010017x

Other claims from this paper (10)

Intervention effect Delayed stubble seeding reduced plant population by 40 to 60%.
Intervention effect Delayed stubble seeding reduced yield by 30 to 40%.
Observation Population decline was 40% on sandy loam.
Observation Population decline was 56% on silt loam.
Observation On chemical fallow, population gradually decreased with delay.
Intervention effect Delayed seeding reduced test weight about 8%.
Intervention effect Delayed seeding extended time to maturity by 10 to 13 days.
Intervention effect Grain protein was unaffected by seeding time.
Recommendation Authors recommend chemical-fallow seeding until early October.
Recommendation Authors recommend stubble seeding by mid-September.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

At low soil moisture, high N decreased corn yield.

Taxon: cornZea mays subsp. mayst0
Treatment: high Ne0
Outcome: yielde0
Direction: decreasee0
Qualifier: low soil moisturee0

Not reportedComparator

Verbatim

e0
“At the low soil moisture, high N resulted in yield decrease”
✓ located verbatim in the source · abstract, characters 407–466

t0
“corn”
✓ located verbatim in the source · abstract, characters 47–51

Title

Moisture levels, nitrogen levels—clue to the next limiting factor on crop production

Arthur Wallace Journal of Plant Nutrition 1990. doi:10.1080/01904169009364090

Other claims from this paper (7)

Association Nitrogen and soil moisture showed additive and synergistic interactions for corn.
Observation Corn grain yield reached 10,600 kg ha‐1 with the highest N and soil moisture.
Observation Corn grain yield was 1100 kg ha‐1 with low moisture and high N.
Observation Corn grain yield was 2700 kg ha‐1 with low N and high soil moisture.
Association The critical N level varied with moisture.
Observation The highest N level did not elicit a full response.
Observation Another factor became more limiting than N.

Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

NPK fertilization may temporarily decrease extractable soil Zn.

Taxon: blue gramaBouteloua gracilist0
Treatment: NPK fertilizatione0
Outcome: extractable Zne0
Direction: decreasee0
Qualifier: at least temporarilye0

Not reportedComparator

Verbatim

e0
“NPK fertilization may increase growth and decrease extractable Zn to a lower amount, at least temporarily”
✓ located verbatim in the source · abstract, characters 1374–1479

t0
“Blue Grama”
✓ located verbatim in the source · title, characters 0–10

Title

Blue Grama Herbage Yield in Relation to Available Soil and Herbage Zinc Contents

E. M. White; F. R. Gartner Soil Science Society of America Journal 1991. doi:10.2136/sssaj1991.03615995005500030034x

Other claims from this paper (7)

Association About 2 mg kg −1 DTPA-extracted soil Zn was needed for growth.
Intervention effect NPK fertilization may increase blue grama growth.
Observation Vigorous young herbage had at least 11 to 13 mg Zn kg −1.
Observation Older herbage had less Zn.
Association DTPA-extractable soil Zn was unrelated to extracted Fe, Cu and Mn.
Association Plant Zn and Mg contents were correlated.
Association Plant Zn was not correlated with Co, Mn, Fe or P content.

Mechanismhypothesisoriginal resultnegativebasis n/a

Claim · model-written summary

The quantum yield decrease may partly reflect lower light capture efficiency due to lower chlorophyll content.

Taxon: Norway sprucePicea abiest0
Outcome: apparent quantum yielde1
Direction: decreasede1
Qualifier: a lower efficiency of light capture due to a lower content of chlorophylle0

Verbatim

e0
“The decrease could probably partly be attributed to a lower efficiency of light capture due to a lower content of chlorophyll.”
✓ located verbatim in the source · abstract, characters 629–755

t0
“Norway spruce”
✓ located verbatim in the source · title, characters 22–35

e1
“the apparent quantum yield decreased with increasing shoot age and ozone concentration”
✓ located verbatim in the source · abstract, characters 487–573

Title

Long‐term exposure of Norway spruce,Picea abies(L.) Karst., to ozone in opentop chambers

G. WALLIN; L. SKÄRBY; G. SELLDÉN New Phytologist 1992. doi:10.1111/j.1469-8137.1992.tb02938.x

Other claims from this paper (8)

Association Apparent quantum yield decreased with shoot age in 1- and 2-year-old shoots.
Intervention effect Apparent quantum yield decreased with increasing ozone concentration in 1- and 2-year-old shoots.
Intervention effect No effect on apparent quantum yield was found in current-year shoots.
Intervention effect No effect was observed on the Kok-effect or light response curve convexity across treatments or age classes.
Intervention effect Current-year NF+ shoots had a significantly higher light compensation point than CF and NF shoots.
Mechanism The higher light compensation point was suggested to reflect increased dark respiration.
Intervention effect Ozone had a larger effect on light-saturated photosynthesis than on apparent quantum yield.
Intervention effect Ozone was suggested to influence photosynthetic efficiency more at high than at low light.

Associationobservedoriginal resultmixedmeasured

Claim · model-written summary

Reduced vegetative growth did not necessarily produce a comparable seed yield reduction.

Taxon: SoybeanGlycine maxt0
Organ / stage: vegetative growthe0
Outcome: seed yielde0

Not reportedDirection

Verbatim

e0
“A decrease in vegetative growth did not necessarily result in a comparable decrease in seed yield.”
✓ located verbatim in the source · abstract, characters 1843–1941

t0
“Soybean”
✓ located verbatim in the source · title, characters 0–7

Title

Soybean Growth and Yield as Affected by Surface and Suboil Compaction

J. F. Johnson; W. B. Voorhees; W. W. Nelson; et al. Agronomy Journal 1990. doi:10.2134/agronj1990.00021962008200050027x

Other claims from this paper (9)

Intervention effect Surface compaction reduced yield by 15% overall on Ves sites.
Intervention effect Surface compaction reduced Ves yield by up to 27% in a single year.
Intervention effect On the Webster site, surface compaction generally reduced yield in a wet year.
Intervention effect On the Webster site, surface compaction generally raised yield in a dry year.
Intervention effect The 18 Mg subsoil compaction treatment reduced plant height and leaf area index at Webster each year.
Intervention effect The 18 Mg subsoil compaction treatment tended to reduce yield at Webster.
Observation The 18 Mg load had an inconsistent response on Ves.
Intervention effect The 9 Mg treatment significantly increased yield in five of fourteen location-years.
Intervention effect Annual surface compaction affected growth and yield more than one-time subsoil compaction.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Dry matter yield fell linearly with greater cutting height.

Taxon: bermudagrassCynodon dactylone0 t0
Treatment: cutting heighte0
Outcome: DM yielde0
Direction: decreasee0

Verbatim

e0
“There was a linear decrease in DM yield as cutting height increased”
✓ located verbatim in the source · abstract, characters 1044–1111

t0
“Bermudagrass‐Crabgrass Mixture”
✓ located verbatim in the source · title, characters 77–107

Title

Cutting Height and Frequency Effects on Composition, Yield, and Quality of a Bermudagrass‐Crabgrass Mixture

G. E. Aiken; S. E. Sladden; D. I. Bransby jpa 1995. doi:10.2134/jpa1995.0079

Other claims from this paper (17)

Intervention effect Crabgrass percentage was low in 1990 and unresponsive to cutting height.
Association In 1991 crabgrass percentage rose with cutting height.
Association In 1991 crabgrass percentage fell with cutting interval.
Association Dry matter yield rose linearly with longer cutting interval.
Association Crude protein percentage fell with longer cutting interval.
Association Crude protein response to height changed from negative to positive as interval increased.
Association Digestibility rose curvilinearly with cutting height.
Association In 1990 IVOMD fell with longer intervals, faster at greater cutting height.
Association In 1991 IVOMD declined curvilinearly with longer cutting intervals.
Observation Highest DM yield occurred with six-week interval and one-inch height.
Observation That high-yield treatment gave the lowest protein and digestibility.
Observation Highest forage quality occurred at one-week cutting intervals.
Association At each interval, protein and digestibility tended to be higher at seven-inch height.
Recommendation Raising cutting height to four inches may improve hay quality.
Association Above four inches quality gains did not offset yield decline.
Observation Crabgrass was most competitive under frequent harvest and tall cutting height.
Recommendation One-inch cutting at four- to six-week intervals may favor bermudagrass competitively.

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“yield decrease”

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