Search claims · PlantClaims

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Further raising CO2 from 2600 to 10000 micromoles mol-1 produced a smaller further decrease in those yield traits.

Taxon: wheatTriticum aestivumt0
Treatment: 10000 micromoles mol-1e0
Outcome: decreasee0
Direction: decreasee0
Comparator: 2600e0

Verbatim

e0
“Further elevation of [CO2] from 2600 to 10000 micromoles mol-1 caused a further but smaller decrease”
✓ located verbatim in the source · abstract, characters 1079–1179

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

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

A 50% grain yield decrease occurred at about 72 mM NaCl with 0.2 x HS.

Taxon: wheatTriticum aestivumt0
Outcome: grain yield decreasee0
Direction: decreasee0
Value: 72e0

Verbatim

e0
“The salinity level associated with a 50% grain yield decrease was about 84, 72, and 31 mM NaCl for 1,0.2, and 0.04 × HS, respectively.”
✓ located verbatim in the source · abstract, characters 1065–1199

t0
“wheat”
✓ located verbatim in the source · title, characters 59–64

Title

Interactive effects of salinity and macronutrient level on wheat. I. Growth

Y. Hu; J. J. Oertli; U. Schmidhalter Journal of Plant Nutrition 1997. doi:10.1080/01904169709365324

Other claims from this paper (16)

Intervention effect Main spike grain yield decreased slightly at 1 x HS under low to medium salinity.
Intervention effect Main spike grain yield decreased slightly at 0.2 x HS under low to medium salinity.
Intervention effect Main stem grain yield decreased more at 0.04 x HS.
Intervention effect High salinity caused larger decreases in main stem grain yield.
Observation High-salinity yield loss was more marked at 0.2 than 1 x HS.
Intervention effect Increasing salinity strongly decreased plant yield components other than thousand grain weight.
Observation A 50% grain yield decrease occurred at about 84 mM NaCl with 1 x HS.
Observation A 50% grain yield decrease occurred at about 31 mM NaCl with 0.04 x HS.
Observation Salt tolerance was higher at full macronutrient concentration.
Association Grain yield declines were closely related to declining leaf number.
Association Grain yield declines were closely related to declining tiller number.
Mechanism The authors infer salinity mainly affects early growth stages.
Recommendation The authors recommend increasing nutrient supply in nutrient-poor saline soils.
Recommendation The authors recommend salt elimination around roots during early wheat development.
Recommendation The authors recommend increasing main stem density by seeding more densely.
Recommendation Early salt elimination and increased seeding density were expected to raise yield more than added nutrients at moderate and sufficient nutrient levels.

Intervention effectobservedoriginal resultno effectsimulated

Claim · model-written summary

Different simulated yield-decrease patterns with the same average yield produced little change in profitability.

Taxon: Sugarcanee0
Treatment: Different simulated patterns of yield decrease between cropse1
Outcome: profitabilitye1
Direction: little changee1
Comparator: same average yielde1

Verbatim

e0
“Sugarcane ( Saccharum sp. hyb.)”
✓ located verbatim in the source · abstract, characters 0–31

e1
“Different simulated patterns of yield decrease between crops with the same average yield effected little change in profitability”
✓ located verbatim in the source · abstract, characters 5266–5394

Title

Economic Analysis of Sugarcane Variety Selection, Crop Yield Patterns, and Ratoon Crop Plow Out Decisions

M. E. Salassi; S. B. Milligan jpa 1997. doi:10.2134/jpa1997.0539

Other claims from this paper (10)

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

Exotic cytoplasms in upland cotton backgrounds tended to decrease lint yield.

Taxon: UPLAND COTTONt0
Material: upland cotton backgroundse1
Treatment: exotic cytoplasmse1
Outcome: lint yielde1
Direction: decreasee1

Verbatim

t0
“UPLAND COTTON”
✓ located verbatim in the source · title, characters 71–84

e1
“When transferred into upland cotton backgrounds, the exotic cytoplasms in general tended to decrease lint yield”
✓ located verbatim in the source · abstract, characters 379–490

Title

EFFECT OF EXOTIC CYTOPLASMS ON ECNOMIC TRAITS AND INSECT RESISTANCE IN UPLAND COTTON

Jinlan Liu 1992

Other claims from this paper (5)

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Decreasing spacing did not decrease yield per plant in 1989.

Taxon: basilOcimum basilicumt0
Treatment: A decrease of in-row plant spacinge0
Outcome: yield per plante0
Direction: not in 1989e0

Not reportedComparator

Verbatim

e0
“A decrease of in-row plant spacing decreased yield per plant in 1990, but not in 1989”
✓ located verbatim in the source · abstract, characters 561–646

t0
“Basil”
✓ located verbatim in the source · title, characters 48–53

Title

In-Row Plant Spacing and Yields of Fresh-Market Basil

Jeanine M. Davis Journal of Herbs Spices & Medicinal Plants 1993. doi:10.1300/j044v02n01_05

Other claims from this paper (3)

Intervention effect In 1989, 20 cm spacing gave the highest sweet basil yield per meter of row.
Intervention effect In 1989, yield per plant did not differ across spacings of 20 to 51 cm.
Intervention effect Decreasing spacing decreased yield per plant in 1990.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Later spring seeding tended to decrease alfalfa dry matter yield.

Taxon: alfalfaMedicago sativae0
Treatment: Seeding alfalfa latere0
Outcome: alfalfa dry matter (DM) yielde0
Direction: decreasee0
Comparator: earliere0

Verbatim

e0
“Seeding alfalfa later, compared with earlier, in the spring tended to increase weed and decrease alfalfa dry matter (DM) yield”
✓ located verbatim in the source · abstract, characters 1037–1163

Title

Evaluation of Weed Control Practices during Spring and Summer Alfalfa Establishment

M. H. Hall; W. S. Curran; E. L. Werner; et al. jpa 1995. doi:10.2134/jpa1995.0360

Other claims from this paper (14)

Intervention effect Later spring alfalfa seeding tended to increase weed dry matter yield.
Intervention effect Spring seeding date did not affect seeding-year total dry matter yield.
Intervention effect Spring seeding date did not affect seeding-year forage quality.
Intervention effect Spring weed-control effects on alfalfa and weed yield were sporadic.
Intervention effect No spring weed control generally gave the greatest net return.
Intervention effect Spring seeding timing and weed-control treatments did not consistently differ in later yield, quality or net return.
Intervention effect Later summer seeding reduced first-harvest alfalfa yield by 704 lb/acre.
Intervention effect Later summer seeding reduced total-season alfalfa yield by 1121 lb/acre.
Intervention effect Summer weed control generally did not improve alfalfa dry matter yield.
Intervention effect Summer weed control generally did not improve total dry matter yield.
Intervention effect Summer weed control generally did not improve forage quality.
Intervention effect Summer weed control generally did not improve net economic return per acre.
Recommendation The authors conclude that studied weed-control practices were not economically beneficial and may reduce returns.
Recommendation The authors advise against nurse crops or herbicides where severe weed infestation is not expected.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping caused a 2–7% yield decrease in egusi melon.

Taxon: egusi melonCitrullus mucosospermuse2
Treatment: Intercroppinge2
Outcome: yielde2
Direction: decreasee2
Value: 2–7e2

Not reportedComparator

Verbatim

e2
“Intercropping did not significantly influence bunch yield of plantain but it caused a 2–7 and 20% yield decrease in egusi melon and water melon respectively”
✓ located verbatim in the source · abstract, characters 472–628

Title

Productivity of Plantain (MusaAAB)-Melon Mixtures in South Western Nigeria

M. A. Jolaoso; I. M. Ojeifo; I. O.O. Aiyelaagbe Biological Agriculture & Horticulture 1996. doi:10.1080/01448765.1996.9754791

Other claims from this paper (6)

Intervention effect Intercropping with 5000 and 6666 melon plants ha−1 significantly decreased plantain leaf area.
Intervention effect Intercropping did not significantly influence plantain bunch yield.
Intervention effect Intercropping caused a 20% yield decrease in water melon.
Observation Land Equivalent Ratios of the plantain-melon intercropped plots were 1.67, 1.69 and 1.74.
Observation Cash advantage of plantain intercropped with 3333, 5000 and 6666 melon plants ha−1 was N61400, N65700 and N72100 ha−1.
Recommendation The authors propose the plantain-melon mixture as an alternative sustainable mixture to existing plantain-based systems.

Intervention effectauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

Reducing plant density to save water may decrease rather than increase wheat yield under water-limited conditions.

Taxon: wheatTriticum aestivume1
Treatment: reducing the densitye1
Outcome: wheat yielde1
Direction: decreasee1

Not reportedComparator

Verbatim

e1
“reducing the density of palnts to reduce water use may decrease rather than increase wheat yield under water limited conditions”
✓ located verbatim in the source · abstract, characters 1397–1524

Title

Plant Spacing, Density, and Yield of Wheat Subjected to Postanthesis Water Deficits

Neil C. Turner; Praphan Prasertsak; Timothy L. Setter Crop Science 1994. doi:10.2135/cropsci1994.0011183x003400030026x

Other claims from this paper (8)

Intervention effect Uneven machine planting reduced wheat yield by 20% compared with evenly spaced plants under postanthesis water deficits.
Intervention effect Yield of irrigated wheat was not reduced by uneven planting.
Intervention effect Wheat at high densities developed lower leaf and ear water potentials than at low densities during postanthesis water deficits.
Intervention effect The greater postanthesis water deficits did not reduce wheat yields.
Intervention effect Grain yields at 25 and 50 plants per square meter were lower than at 200 plants per square meter when postanthesis water deficits developed.
Intervention effect Later-formed tillers, produced only at low densities, had smaller thousand-grain weights than the mainstem and first tiller under water deficit.
Observation Anthesis was delayed by up to 20 days in later-formed tillers of wheat.
Observation Grain fill occurred at low leaf and ear water potentials in wheat.

Associationobservedoriginal resultpositivemeasured

Claim · model-written summary

Fruit yield of acid lime was closely associated with the decrease in chlorosis (r = 0.939).

Taxon: Acid Limet0
Treatment: decrease in chlorosise3
Outcome: Fruit yielde3
Value: r = 0.939e3

Not reportedDirection

Verbatim

t0
“Acid Lime”
✓ located verbatim in the source · title, characters 71–80

e3
“Fruit yield was closely associated with the decrease in chlorosis (r = 0.939**)”
✓ located verbatim in the source · abstract, characters 369–448

Title

Effect of Foliar Spray of Iron and Sulphur on Fruit Yield of Chlorotic Acid Lime

P. C. Patel; Patel; N. K. Kalyanasundaram Journal of the Indian Society of Soil Science 1997

Other claims from this paper (4)

Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

A 50% grain yield decrease occurred at about 31 mM NaCl with 0.04 x HS.

Taxon: wheatTriticum aestivumt0
Outcome: grain yield decreasee0
Direction: decreasee0
Value: 31 mM NaCle0

Verbatim

e0
“The salinity level associated with a 50% grain yield decrease was about 84, 72, and 31 mM NaCl for 1,0.2, and 0.04 × HS, respectively.”
✓ located verbatim in the source · abstract, characters 1065–1199

t0
“wheat”
✓ located verbatim in the source · title, characters 59–64

Title

Interactive effects of salinity and macronutrient level on wheat. I. Growth

Y. Hu; J. J. Oertli; U. Schmidhalter Journal of Plant Nutrition 1997. doi:10.1080/01904169709365324

Other claims from this paper (16)

Intervention effect Main spike grain yield decreased slightly at 1 x HS under low to medium salinity.
Intervention effect Main spike grain yield decreased slightly at 0.2 x HS under low to medium salinity.
Intervention effect Main stem grain yield decreased more at 0.04 x HS.
Intervention effect High salinity caused larger decreases in main stem grain yield.
Observation High-salinity yield loss was more marked at 0.2 than 1 x HS.
Intervention effect Increasing salinity strongly decreased plant yield components other than thousand grain weight.
Observation A 50% grain yield decrease occurred at about 84 mM NaCl with 1 x HS.
Observation A 50% grain yield decrease occurred at about 72 mM NaCl with 0.2 x HS.
Observation Salt tolerance was higher at full macronutrient concentration.
Association Grain yield declines were closely related to declining leaf number.
Association Grain yield declines were closely related to declining tiller number.
Mechanism The authors infer salinity mainly affects early growth stages.
Recommendation The authors recommend increasing nutrient supply in nutrient-poor saline soils.
Recommendation The authors recommend salt elimination around roots during early wheat development.
Recommendation The authors recommend increasing main stem density by seeding more densely.
Recommendation Early salt elimination and increased seeding density were expected to raise yield more than added nutrients at moderate and sufficient nutrient levels.

“yield decrease”

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