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“yield decrease”

671 matches

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1950 ’60 ’70 ’80 ’90 2000 ’10 ’20

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Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The yield decrease under high-dose ethylene was attributed to fewer seeds per flower.

Taxon: OnionAllium cepat0
Outcome: decreasese0
Qualifier: reduction in the number of seeds per flowere0

Verbatim

e0
“Such decreases were due to a reduction in the number of seeds per flower.”
✓ located verbatim in the source · abstract, characters 1117–1190

t0
“Onion”
✓ located verbatim in the source · title, characters 60–65

Title

Ethylene and Chitosan Affected the Seed Yield Components of Onion Depending More on the Dose than Timing of Application

Daniele Vecchiotti; Francesco G. S. Angeletti; Gianfranco Romanazzi; et al. Horticulturae 2022. doi:10.3390/horticulturae8090781

Other claims from this paper (11)

Intervention effect Early 100% recommended-dose ethylene did not change onion seed yield.
Intervention effect Early 100% recommended-dose ethylene increased thousand seed weight by 3.2%.
Intervention effect The 150% recommended ethylene dose decreased onion seed yield by 33.5% regardless of application timing.
Intervention effect Chitosan had no apparent crop effect at 100% recommended-dose ethylene.
Intervention effect Under 150% recommended-dose ethylene, chitosan increased onion seed yield.
Intervention effect Under 150% recommended-dose ethylene, chitosan slightly increased thousand seed weight without statistical significance.
Observation Fresh onion seed germination was 92%.
Intervention effect Seventeen months of aging reduced onion seed germination by 14%.
Intervention effect Ethylene and chitosan treatments did not change the onion germination pattern.
Mechanism The authors suggested that high-dose ethylene yield loss may reflect delayed flowering during a relatively dry month.
Mechanism The authors proposed that chitosan sustained yield under 150% recommended-dose ethylene through physical protection from transpiration.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Decrease of grain weight was caused by a decrease in the number of panicles per unit area.

Taxon: RiceOryza sativat0
Outcome: grain weighte3
Qualifier: number of panicles (per unit area)e3

Verbatim

t0
“Irregular Disposition of Rice Plant”
✓ located verbatim in the source · title, characters 14–49

e3
“Decrease of grain weight was caused by that of number of panicles (per unit area)”
✓ located verbatim in the source · abstract, characters 694–775

Title

The Effect of Irregular Disposition of Rice Plant on Yield in Direct Sowing Culture

Masami HIMEDA; Seiichi IZUMI Japanese Journal of Crop Science 1965. doi:10.1626/jcs.33.399

Other claims from this paper (9)

Intervention effect More irregular disposition of rice plants caused a greater decrease in grain weight per unit area.
Intervention effect The decrease in grain weight with irregular disposition was more remarkable in Fujiminori than in Manryo.
Association In Fujiminori, the number of panicles decreased as irregularity in plant disposition increased.
Intervention effect In Fujiminori, grain weight per panicle remained unchanged as irregularity in plant disposition increased.
Association In Manryo, grain weight per panicle increased.
Association In Manryo, the number of panicles decreased.
Intervention effect In plots of cv 30∼100 %, no decrease of grain weight was observed relative to the plot of cv 0 %.
Intervention effect In Fujiminori, the decrease in grain weight with irregular disposition was more marked at low seeding density than at high seeding density.
Intervention effect In Manryo, the difference in the effect of irregular disposition on grain weight between spacing densities was not clear.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The yield decrease from withholding factors from the HT system is explained by decreasing kernel number.

Taxon: cornZea mays subsp. mayse0
Outcome: yielde4
Qualifier: by decreasing kernel numbere4

Verbatim

e0
“In 2009 and 2010, five management factors were assessed for their individual and cumulative contributions to reducing the corn ( Zea mays L.) yield gap”
✓ located verbatim in the source · abstract, characters 114–265

e4
“if each factor was withheld from the HT system, yield decreased by decreasing kernel number”
✓ located verbatim in the source · abstract, characters 1216–1307

Title

Evaluating Management Factor Contributions to Reduce Corn Yield Gaps

Matias L. Ruffo; Laura F. Gentry; Adam S. Henninger; et al. Agronomy Journal 2015. doi:10.2134/agronj14.0355

Other claims from this paper (7)

Intervention effect The HT control yielded 2.9 Mg ha −1 more grain (28%) than the ST control.
Intervention effect All management factors except plant population were necessary for reducing the yield gap.
Intervention effect Fungicide and Bt traits gave the greatest yield increases compared with the ST system.
Intervention effect Averaged over sites and years, withholding each factor from the HT system decreased yield.
Intervention effect Increased plant population reduced the yield gap when all other inputs were applied at the supplemental level.
Association Kernel number was more significant for increasing yield than kernel weight.
Intervention effect The yield contribution of each factor was greater when applied as part of a full set of supplemental inputs than when added individually to the standard system.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Higher temperatures shortened grain-filling duration, accounting for nearly all of the grain-yield decrease.

Taxon: MAIZEZea mayst0
Outcome: decreases in grain yielde0
Qualifier: shorter duration of grain fillinge0

Verbatim

e0
“The decreases in grain yield were almost entirely determined by a shorter duration of grain filling”
✓ located verbatim in the source · abstract, characters 795–894

t0
“WHOLE PLANT AND GRAIN YIELD IN MAIZE (Zea mays L.)”
✓ located verbatim in the source · title, characters 46–96

Title

EFFECT OF TEMPERATURE DURING GRAIN FILLING ON WHOLE PLANT AND GRAIN YIELD IN MAIZE (Zea mays L.)

B. BADU-APRAKU; R. B. HUNTER; M. TOLLENAAR Canadian Journal of Plant Science 1983. doi:10.4141/cjps83-040

Other claims from this paper (9)

Intervention effect Higher temperatures reduced whole-plant dry matter accumulation during grain filling.
Intervention effect Higher temperatures shortened the period from 18 days after silking to complete leaf senescence.
Intervention effect Higher temperatures lowered the rate of whole-plant dry matter production to a limited extent.
Intervention effect Grain yield per plant was lower under higher temperatures.
Intervention effect Temperature had no observed effect on kernel growth rates.
Intervention effect Temperature had no observed effect on kernel number per ear.
Mechanism Kernel dry-matter gain during rapid grain filling drew on stored assimilates and current photosynthesis.
Intervention effect At the highest temperature, remobilized assimilates accounted for a greater share of kernel weight gain.
Intervention effect Higher night temperatures may increase the share of kernel gain supplied by remobilized stored dry matter.

Mechanismhypothesisoriginal resultbasis n/a

Claim · model-written summary

The authors suggest the yield decrease may have been because patches of sward failed to regrow where more fertilizer was applied.

Taxon: Grass Swardst0
Treatment: more fertilizere1
Outcome: patches of sward failed to regrowe1

Verbatim

t0
“Grass Swards”
✓ located verbatim in the source · title, characters 61–73

e1
“perhaps because patches of sward failed to regrow where the crop received more fertilizer”
✓ located verbatim in the source · abstract, characters 1035–1124

Title

Effect of Fungicides and Fertilizer on Yield and Diseases of Grass Swards

E. W. BROOM; A. J. HEARD; ELLIS GRIFFITHS; et al. Plant Pathology 1975. doi:10.1111/j.1365-3059.1975.tb01881.x

Other claims from this paper (15)

Intervention effect Fungicides did not affect total annual dry matter yields at any of the three sites.
Intervention effect Some fungicides slightly affected yield at some individual harvests.
Observation Slight crown rust occurred on perennial ryegrass at Hurley in autumn 1972.
Intervention effect Crown rust on perennial ryegrass was well controlled by oxycarboxin.
Intervention effect Crown rust on perennial ryegrass was slightly controlled by benomyl.
Intervention effect Yields of perennial ryegrass were not increased although crown rust was controlled by oxycarboxin and slightly by benomyl.
Observation Drechslera spp. seemed slightly more common where the rust was controlled.
Intervention effect At Hurley the ley yielded more with 400 kg N/ha than with 100 kg N/ha.
Intervention effect The extra nitrogen fertilizer did not damage the sward at Hurley.
Intervention effect The extra nitrogen fertilizer did not affect the amount of disease at Hurley.
Intervention effect At Aberystwyth the leys were not damaged by 400 kg N/ha.
Observation Yields at Aberystwyth were large.
Intervention effect On old pasture at Rothamsted, extra NK fertilizer never increased the yield of herbage.
Intervention effect On old pasture at Rothamsted, extra NK fertilizer once slightly decreased the yield of herbage.
Observation There was no evidence that fungal diseases were involved in the herbage yield decrease at Rothamsted.

Mechanismobservedoriginal resultmeasured

Claim · model-written summary

Erect leaf form grain yield was attributed to decreased plant height.

Taxon: RyeSecale cerealet0
Organ / stage: plant heighte0
Outcome: plant heighte0
Direction: decreasee0
Qualifier: decrease of plant heighte0

Verbatim

e0
“which is predetermined by decrease of plant height”
✓ located verbatim in the source · abstract, characters 696–746

t0
“Selection of Rye (Secale cereal L) on increased photosynthetic activities of leaves”
✓ located verbatim in the source · title, characters 0–83

Title

Selection of Rye (Secale cereal L) on increased photosynthetic activities of leaves

В. В. Скорик; Волод. В. Скорик; Н. В. Симоненко; et al. Plant varieties studying and protection 2009. doi:10.21498/2518-1017.1(9).2009.66233

Other claims from this paper (6)

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Yield loss mainly resulted from smaller bulbs.

Taxon: OnionsAllium cepat0
Outcome: Loss of yielde0
Qualifier: decrease in bulb sizee0

Verbatim

e0
“Loss of yield was mainly the result of decrease in bulb size”
✓ located verbatim in the source · abstract, characters 753–813

t0
“Bulb Onions”
✓ located verbatim in the source · title, characters 62–73

Title

The Effect of Weed Removal at Different Times on the Yield of Bulb Onions

R.T. Hewson; H.A. Roberts Journal of Horticultural Science 1971. doi:10.1080/00221589.1971.11514426

Other claims from this paper (10)

Intervention effect Weeds present for the first 4–6 weeks did not affect final yield if removed thereafter.
Intervention effect Longer weed presence progressively reduced yield.
Intervention effect An additional two weeks of weed presence caused an average 60% yield loss.
Intervention effect Weeds developing after a clean first 6–8 weeks did not affect yield.
Observation The critical period occurred during third true leaf development.
Intervention effect Full-season weeds prevented production of marketable bulbs.
Intervention effect Weeds remaining longer than nine weeks reduced crop stand.
Intervention effect Full-season competition halved crop stand.
Association Yield reduction was associated with delayed top fall-over.
Association Yield reduction was associated with more thick-necked onions.

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

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The authors attribute yield loss under elevated ozone mainly to declining grain weight caused by reduced filling rate and plumpness.

Taxon: winter wheatTriticum aestivume0
Treatment: E-O3e1
Outcome: grain yield decreasee1
Qualifier: declining of grain weight which was caused by the decrease of grain filling rate and grain plumpnesse1

Verbatim

e0
“winter wheat(Tritcium aestivum L.)”
✓ located verbatim in the source · abstract, characters 341–375

e1
“Under E-O3,grain yield decrease resulted mainly from the declining of grain weight which was caused by the decrease of grain filling rate and grain plumpness.”
✓ located verbatim in the source · abstract, characters 1820–1978

Title

Effects of Elevated Ozone Concentration on Grain Yield and Plumpness in Wheat with FACE System

Zhaozhong Feng 2011

Other claims from this paper (12)

Intervention effect Elevated ozone decreased mean grain yield by 19.74% over two years.
Intervention effect Elevated ozone decreased thousand-grain weight by 17.88%.
Intervention effect Elevated ozone decreased grain number per ear by 3.47%.
Intervention effect Elevated ozone increased ear number by 0.95% on average.
Observation Treatment responses differed significantly across treatments, cultivars, and years.
Intervention effect Under elevated ozone, grain length decreased by 0%-4.16%.
Intervention effect Under elevated ozone, grain width decreased by 7.95%-20.24%.
Intervention effect Under elevated ozone, grain thickness decreased by 2.66%-11.00%.
Intervention effect Elevated ozone reduced grain volume by 8.5%-31.5%.
Intervention effect Elevated ozone decreased average grain filling rate.
Intervention effect Grain plumpness changed by -21.40%-3.76% under elevated ozone.
Intervention effect Grain shrinkage index increased by 0.23%-36.66% under elevated ozone.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Diquat caused the greatest seed-yield decrease, mainly through mean seed weight.

Taxon: beans (Phaseolus vulgaris)Phaseolus vulgarist0
Treatment: diquate0
Outcome: largest decreasese0
Qualifier: effects on mean seed weighte0

Verbatim

e0
“The largest decreases were caused by diquat and were attributable mainly to effects on mean seed weight.”
✓ located verbatim in the source · abstract, characters 1714–1818

t0
“beans (Phaseolus vulgaris)”
✓ located verbatim in the source · title, characters 33–59

Title

Chemical aids to drying seeds of beans (Phaseolus vulgaris) before harvest

C. C. HOLE; R. C. HARDWICK Annals of Applied Biology 1978. doi:10.1111/j.1744-7348.1978.tb00734.x

Other claims from this paper (16)

Observation Bipyridyl formulations produced the largest seed-moisture effects.
Intervention effect In 1974 diquat decreased Processor bean seed moisture by 98 mg g−1 dry weight.
Intervention effect In 1975 diquat decreased Seafarer navy bean seed moisture by 123 mg g−1.
Intervention effect Lower-rate diquat decreased seed moisture by 79 mg g−1.
Intervention effect Paraquat decreased seed moisture by 147 mg g−1.
Intervention effect Dimexan decreased seed moisture by 32 mg g−1 in 1974.
Intervention effect Dimexan decreased seed moisture by 72 mg g−1 in 1975.
Intervention effect Ethephon decreased seed moisture by 78 mg g−1 in 1974.
Intervention effect Ethephon decreased seed moisture by 31 mg g−1 in 1975.
Intervention effect Metham-sodium decreased seed moisture by 105 mg g−1 in 1975.
Intervention effect Mechanical root trimming reduced seed moisture by 67 mg g−1.
Intervention effect Wiltz-65 reduced seed moisture by within 31–60 mg g−1.
Intervention effect N252 reduced seed moisture by within 31–60 mg g−1.
Intervention effect Sequential ethephon and diquat reduced seed moisture by within 31–60 mg g−1.
Intervention effect Every treatment decreased seed yield.
Recommendation At then-current prices, field chemical drying was not economically worthwhile because yield loss offset drying savings.

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“yield decrease”

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