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“yield decrease”

1,236 matches

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Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Yield fell by 20 kg/ha.day with sowing delay after early May.

Taxon: wheatTriticum aestivumt0
Treatment: delay in sowing after early Maye0
Outcome: grain yielde0
Direction: decreasee0
Value: 20 kg/ha.daye0

Verbatim

e0
“The average decrease in grain yield with delay in sowing after early May was 20 kg/ha.day”
✓ located verbatim in the source · abstract, characters 570–659

t0
“Responses of wheat cultivars”
✓ located verbatim in the source · title, characters 0–28

Title

Responses of wheat cultivars to time of sowing in the southern wheatbelt of Western Australia

BJ Shackley; WK Anderson Australian Journal of Experimental Agriculture 1995. doi:10.1071/ea9950579

Other claims from this paper (11)

Observation All tested cultivars and crossbreds yielded most when sown in early May.
Association Yield declined almost linearly after early May for crossbreds and cultivars.
Association Crossbred maturity did not fully predict the rate of yield decline.
Observation Spear ranked among highest yielding cultivars in early May and June sowings.
Observation Kulin yielded comparably to Spear only with June sowing.
Observation Gutha yielded comparably to Spear only with June sowing.
Recommendation The authors advise against retaining cultivars for a range of sowing times.
Observation The optimum flowering period in the medium rainfall zone was 17 September-7 October.
Observation The optimum flowering period in the low rainfall area was 3 September- 23 September.
Observation Frost damage risk persisted in about 1 year in 3 for the estimated periods.
Recommendation The authors advise accepting some frost risk to maximize yield.

Observationobservedoriginal resultmeasured

Claim · model-written summary

The greater conversion of violaxanthin was correlated with lower photosystem II quantum yield.

Taxon: tobaccoNicotiana tabacumt0
Outcome: quantum yield of photosystem II photochemistrye0
Direction: decreasee0
Qualifier: correlatede0

Verbatim

e0
“this was found to be correlated with a decrease in the quantum yield of photosystem II photochemistry.”
✓ located verbatim in the source · abstract, characters 1017–1119

t0
“tobacco”
✓ located verbatim in the source · title, characters 74–81

Title

Consequences of chlorophyll deficiency for leaf carotenoid composition in tobacco synthesizing glutamate 1-semialdehyde aminotransferase antisense RNA: dependency on developmental age and growth light

H. Hartel; B. Grimm Journal of Experimental Botany 1998. doi:10.1093/jxb/49.320.535

Other claims from this paper (6)

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

Selection for shorter ears decreased grain yield by 1.7% per cycle.

Taxon: maizeZea mayst0
Treatment: Selection for shorter earse0
Outcome: grain yielde0
Direction: decreasee0
Value: 1.7%e0

Not reportedComparator

Verbatim

e0
“Selection for shorter ears was accompanied by a significant decrease of grain yield of 1.7% ( b 1 = −0.08 Mg ha −1 ± 0.01) cycle −1 of selection”
✓ located verbatim in the source · abstract, characters 913–1057

t0
“Maize”
✓ located verbatim in the source · title, characters 66–71

Title

Twenty‐Seven Cycles of Divergent Mass Selection for Ear Length in Maize

Jose de Jesus Lopez‐Reynoso; Arnel R. Hallauer Crop Science 1998. doi:10.2135/cropsci1998.0011183x003800040035x

Other claims from this paper (9)

Intervention effect Selection for longer ears increased ear length by 1.4% per cycle.
Intervention effect Selection for shorter ears decreased ear length by 1.9% per cycle.
Intervention effect Selection for longer ears did not change yield.
Intervention effect Selection for shorter ears increased kernel-row number.
Intervention effect Selection for shorter ears increased ear diameter.
Intervention effect Selection for longer ears reduced kernel-row number.
Intervention effect Selection for longer ears reduced ear diameter.
Observation Corresponding selection-cycle crosses showed no heterosis.
Association Genetic variation may have decreased with selection.

Associationobservedoriginal resultsimulated

Claim · model-written summary

Pulping cost decreases as pulp yield increases.

Taxon: eucalyptt0
Outcome: cost of converting green roundwood to unbleached pulpe0
Direction: decreasee0
Qualifier: increasing density and pulp yielde0

Not reportedComparator

Verbatim

e0
“cost of converting green roundwood to unbleached pulp, per oven dry tonne of unbleached pulp produced, will decrease with increasing density and pulp yield”
✓ located verbatim in the source · abstract, characters 316–471

t0
“eucalypt”
✓ located verbatim in the source · title, characters 61–69

Title

The influence of basic density and pulp-yield on the cost of eucalypt kraft pulping: a theoretical model for tree breeding

Bruce L. Greaves; Nuno Borralho Figshare 1996

Other claims from this paper (6)

Association Pulping cost decreases as wood density increases.
Observation Pulp yield has the greatest effect on pulping cost.
Association High recovery boiler energy value reduces the influence of pulp yield on pulping cost.
Association Density has a major effect on digestion cost.
Association Density has a minor effect on evaporation cost.
Association High relative digestion cost increases the influence of density on pulping cost.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Seed yield, harvest index and seeds per head sharply decreased between 1000 and 2600 micromoles mol-1 CO2.

Taxon: wheatTriticum aestivumt0
Treatment: 2600 micromoles mol-1e0
Outcome: seed yield, harvest index and seeds per heade0
Direction: sharp decreasee0
Comparator: 1000e0

Verbatim

e0
“A sharp decrease in seed yield, harvest index and seeds per head occurred by elevating [CO2] from 1000 to 2600 micromoles mol-1”
✓ located verbatim in the source · abstract, characters 950–1077

t0
“Wheat”
✓ located verbatim in the source · title, characters 67–72

Title

Very High CO2Reduces Photosynthesis, Dark Respiration and Yield in Wheat

J REUVENI Annals of Botany 1997. doi:10.1006/anbo.1997.0489

Other claims from this paper (16)

Intervention effect Raising CO2 from 350 to 1000 micromoles mol-1 increased wheat seed yield by 33%.
Intervention effect Raising CO2 from 350 to 1000 micromoles mol-1 increased vegetative biomass by 25%.
Intervention effect Raising CO2 from 350 to 1000 micromoles mol-1 increased heads per square meter by 34%.
Intervention effect Increasing CO2 from 1000 to 10000 micromoles mol-1 decreased seed yield by 37%.
Intervention effect Increasing CO2 from 1000 to 10000 micromoles mol-1 decreased harvest index by 14%.
Intervention effect Increasing CO2 from 1000 to 10000 micromoles mol-1 decreased mass per seed by 9%.
Intervention effect Increasing CO2 from 1000 to 10000 micromoles mol-1 decreased seeds per head by 29%.
Intervention effect Very high CO2 had negligible, nonsignificant effects on vegetative biomass, heads per square meter, and seed mass per head.
Intervention effect Further raising CO2 from 2600 to 10000 micromoles mol-1 produced a smaller further decrease in those yield traits.
Observation The two wheat cultivars responded similarly to CO2 across growth parameters.
Observation Wheat grown in the two cultivation environments did not differ in response to high CO2.
Association High CO2 was not correlated with ethylene production by wheat flag leaves or heads.
Intervention effect Whole-plant photosynthetic rate was 8% lower at 2600 micromoles mol-1 CO2 than at ambient CO2.
Intervention effect Wheat head dark respiration was 25% lower at 2600 micromoles mol-1 CO2 than at ambient CO2.
Mechanism The authors attribute reduced seed set mainly to reduced dark respiration in wheat heads.
Mechanism The authors conclude that ethylene does not mediate reduced wheat seed set.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Reduced individual seed weights contributed to the yield reduction.

Outcome: reductions in yielde0
Qualifier: decrease in the numbers of seeds per pod and in the weights of individual seedse0

Not reportedTaxon

Verbatim

e0
“The reductions in yield were due to a decrease in the numbers of seeds per pod and in the weights of individual seeds.”
✓ located verbatim in the source · abstract, characters 1375–1493

Title

Yield stimulation of a commonly grown cultivar of Phaseolus vulgaris L. at near‐ambient ozone concentrations

G. E. SANDERS; A. D. ROBINSON; P. A. GEISSLER; et al. New Phytologist 1992. doi:10.1111/j.1469-8137.1992.tb00053.x

Other claims from this paper (8)

Intervention effect At lower ozone exposure, bean yield increased relative to filtered air.
Intervention effect Yield peaked at a 48% increase with NF6 ozone treatment.
Observation Maximum leaf number rose 55% in association with the yield peak.
Observation The canopy was retained longer at the yield peak.
Observation Pod number at final harvest rose 45% at the yield peak.
Intervention effect Higher ozone exposure reduced bean yield by 26–42%.
Observation Leaves at higher ozone exposures showed extensive injury and premature abscission.
Mechanism Reduced seeds per pod contributed to the yield reduction.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The 17-bulb plot yielded 16 percent less than the 22-bulb plot.

Taxon: Fritillaria thungergii MIQUELt0
Treatment: 17 bulb plote0
Outcome: decreasee0
Direction: decreasee0
Value: 16 percente0

Not reportedComparator

Verbatim

e0
“16 percent decrease in the 17 bulb plot”
✓ located verbatim in the source · abstract, characters 1922–1961

t0
“Fritillaria thungergii MIQUEL”
✓ located verbatim in the source · title, characters 69–98

Title

Effects of Planting Date and Density on Yield and It’s Components of Fritillaria thungergii MIQUEL

In-Sik Choi; Jin-Tae Cho; Seok-Yong Son; et al. Korean Journal of Medicinal Crop Science 1996

Other claims from this paper (18)

Intervention effect Earlier planting dates led to earlier emergence.
Intervention effect A 50-day planting delay caused a 14-day emergence delay.
Observation Plant height was 22.7cms for the Aug. 20 plot.
Intervention effect Later planting produced shorter plants.
Intervention effect The Aug. 20 yield was 1 percent above the Aug. 30 yield.
Intervention effect The Sep. 10 yield was 4 percent below Aug. 30.
Intervention effect The Sep. 20 yield was 26 percent below Aug. 30.
Intervention effect The Sep 30 yield was 35 percent below Aug. 30.
Intervention effect The Oct. 10 yield was 38 percent below Aug. 30.
Intervention effect Sparse planting delayed emergence by one to three days relative to 33 bulbs per square meter.
Observation At 33 bulbs per square meter, plant height was 21. 8cms.
Observation At 33 bulbs per square meter, shoot count was 6.1.
Intervention effect The 22-bulb plot had 0.4 more shoots than the 33-bulb plot.
Intervention effect The 17-bulb plot had 0.6 more shoots than the 33-bulb plot.
Intervention effect The 13-bulb plot had 0.5 more shoots than the 33-bulb plot.
Intervention effect The 33-bulb plot yielded 2 percent more than the 22-bulb plot.
Intervention effect The 13-bulb plot yielded 34 percent less than the 22-bulb plot.
Recommendation The authors recommend Aug. 25 and 22 bulbs per square meter for cultivation in the middle region.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The 13-bulb plot yielded 34 percent less than the 22-bulb plot.

Taxon: Fritillaria thungergii MIQUELt0
Treatment: 13 bulb plote0
Outcome: decreasee0
Direction: decreasee0
Value: 34 percente0

Not reportedComparator

Verbatim

e0
“34 percent decrease in the 13 bulb plot”
✓ located verbatim in the source · abstract, characters 1966–2005

t0
“Fritillaria thungergii MIQUEL”
✓ located verbatim in the source · title, characters 69–98

Title

Effects of Planting Date and Density on Yield and It’s Components of Fritillaria thungergii MIQUEL

In-Sik Choi; Jin-Tae Cho; Seok-Yong Son; et al. Korean Journal of Medicinal Crop Science 1996

Other claims from this paper (18)

Intervention effect Earlier planting dates led to earlier emergence.
Intervention effect A 50-day planting delay caused a 14-day emergence delay.
Observation Plant height was 22.7cms for the Aug. 20 plot.
Intervention effect Later planting produced shorter plants.
Intervention effect The Aug. 20 yield was 1 percent above the Aug. 30 yield.
Intervention effect The Sep. 10 yield was 4 percent below Aug. 30.
Intervention effect The Sep. 20 yield was 26 percent below Aug. 30.
Intervention effect The Sep 30 yield was 35 percent below Aug. 30.
Intervention effect The Oct. 10 yield was 38 percent below Aug. 30.
Intervention effect Sparse planting delayed emergence by one to three days relative to 33 bulbs per square meter.
Observation At 33 bulbs per square meter, plant height was 21. 8cms.
Observation At 33 bulbs per square meter, shoot count was 6.1.
Intervention effect The 22-bulb plot had 0.4 more shoots than the 33-bulb plot.
Intervention effect The 17-bulb plot had 0.6 more shoots than the 33-bulb plot.
Intervention effect The 13-bulb plot had 0.5 more shoots than the 33-bulb plot.
Intervention effect The 33-bulb plot yielded 2 percent more than the 22-bulb plot.
Intervention effect The 17-bulb plot yielded 16 percent less than the 22-bulb plot.
Recommendation The authors recommend Aug. 25 and 22 bulbs per square meter for cultivation in the middle region.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Lower 1000-grain weight explained most of the yield reduction under added ozone.

Taxon: spring wheatTriticum aestivumt0
Treatment: NF + treatmente0
Outcome: yield reductione0
Qualifier: decrease in 1000‐grain weighte0

Verbatim

e0
“The decrease in 1000‐grain weight explained most of the yield reduction in the plants under NF + treatment”
✓ located verbatim in the source · abstract, characters 1197–1303

t0
“spring wheat”
✓ located verbatim in the source · title, characters 33–45

Title

Effects of low ozone exposure of spring wheat on net CO₂ uptake, Rubisco, leaf senescence and grain filling

KATINKA OJANPERÄ; EIJA PÄTSIKKÄ; TOIVO YLÄRANTA New Phytologist 1998. doi:10.1046/j.1469-8137.1998.00120.x

Other claims from this paper (9)

Intervention effect Added ozone decreased flag-leaf net CO2 uptake by about 40% versus filtered and non-filtered air.
Intervention effect Ozone significantly decreased initial and total Rubisco activity.
Intervention effect Ozone significantly decreased protein-bound SH groups.
Intervention effect Added ozone accelerated flag-leaf senescence, with senescence complete at four rather than five weeks after anthesis.
Intervention effect Added ozone decreased chloroplast size.
Intervention effect Ozone did not affect grain filling rate despite its effect on chloroplasts and CO2 uptake.
Intervention effect Ozone-fumigated plants had a shorter grain-filling period.
Intervention effect Ozone-fumigated plants had smaller kernels.
Mechanism Shortened flag-leaf duration was identified as the main cause of ozone-induced yield loss.

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Reducing stipule size with st decreased yield potential beyond the benefit of improved standing.

Taxon: peaLathyrus oleraceust0
Gene: ste0
Outcome: yield potentiale0
Direction: decreasee0

Verbatim

e0
“With the additional reduction in stipule size by the gene st , the decrease in yield potential was too large to be counterbalanced by the positive effects of an improved standing ability”
✓ located verbatim in the source · abstract, characters 916–1102

t0
“dried peas (Pisum sativum)”
✓ located verbatim in the source · title, characters 56–82

Title

Performance of morphologically divergent plant types in dried peas (Pisum sativum)

D. Stelling The Journal of Agricultural Science 1994. doi:10.1017/s0021859600070362

Other claims from this paper (5)

Observation Normal-leafed plants had the highest yield potential.
Observation Normal-leafed plants had the largest yield loss from lodging.
Observation Semi-leafless plants had lower yield potential than conventional plants.
Observation Unsupported semi-leafless crops lost less yield from lodging than conventional crops.
Observation The two genes affected released cultivars less than isogenic lines.

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“yield decrease”

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