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“yield decrease”

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Organism: Triticum aestivum ✕

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

The 4M:6S ratio did not decrease subsequent wheat yield.

Taxon: wheatTriticum aestivume0
Outcome: yielde0
Direction: did not decreasee0

Verbatim

e0
“but it did not decrease yield of wheat.”
✓ located verbatim in the source · abstract, characters 1740–1779

Title

Row Ratios of Intercropping Maize and Soybean Can Affect Agronomic Efficiency of the System and Subsequent Wheat

Yitao Zhang; Jian Liu; Jizong Zhang; et al. PLoS ONE 2015. doi:10.1371/journal.pone.0129245

Other claims from this paper (14)

Observation Maize–soybean intercropping was the optimal summer cropping system.
Intervention effect Maize–soybean intercropping improved yield, economy and land utilization relative to maize monoculture.
Intervention effect Maize–soybean intercropping reduced soil nitrate accumulation relative to maize monoculture.
Observation Maize–soybean intercropping improved the residual effect on subsequent wheat.
Observation Intercropping reduced nitrogen fertilizer use per unit area.
Observation Intercropping increased relative maize biomass.
Observation Border-row photosynthetic efficiency and nitrogen utilization were promoted during intercropping.
Observation Intercropping advantage emerged at tasseling after maize nitrogen topdressing.
Intervention effect The 4M:6S row ratio had the largest land equivalent ratio of 1.30.
Intervention effect The 4M:6S row ratio had the greatest crop nitrogen accumulation of 258 kg ha(-1).
Intervention effect The 4M:6S row ratio had the greatest economic benefit of 3,408 USD ha(-1).
Intervention effect The 4M:6S ratio lowered soil nitrate after maize harvest compared with maize monoculture.
Intervention effect The 4M:6S ratio lowered soil nitrate after subsequent wheat harvest compared with maize monoculture.
Recommendation The authors recommended alternating four maize rows with six soybean rows as the optimum ratio, subject to further multiyear confirmation.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Winter wheat yield did not decrease with cover crops.

Taxon: winter wheatTriticum aestivume5
Treatment: with CCe5
Outcome: yielde5
Direction: did not decreasee5

Not reportedComparator

Verbatim

e5
“Cover crops significantly increased vegetable crop yields and decreased the silage corn yield; however, grain corn, soybean, and winter wheat yield did not decrease with CC”
✓ located verbatim in the source · abstract, characters 1013–1185

Title

Do Cover Crops Increase Subsequent Crop Yield in Temperate Climates? A Meta-Analysis

Inderjot Chahal; Laura L. Van Eerd Sustainability 2023. doi:10.3390/su15086517

Other claims from this paper (15)

Intervention effect Legume cover crop species increased subsequent crop yield significantly more than grass, by 14%.
Intervention effect Legume cover crop species increased subsequent crop yield significantly more than nonlegume broadleaves, by 7%.
Intervention effect Legume cover crop species increased subsequent crop yield significantly more than mixtures, by 2%.
Intervention effect Incorporating cover crop residue into soil increased crop yield by about 15% compared with leaving the residue on the soil surface.
Intervention effect Grass cover crops enhanced crop yield by 14% relative to no cover crop in non-organic vegetable systems.
Intervention effect Legume cover crops enhanced crop yield by 19% relative to no cover crop in non-organic vegetable systems.
Intervention effect Legume cover crops increased crop yield by 18% relative to no cover crop in coarse textured soil.
Intervention effect Legume cover crops increased crop yield by 4% relative to no cover crop in medium textured soil.
Intervention effect Legume cover crops increased crop yield by 11% relative to no cover crop under high precipitation.
Intervention effect Cover crops significantly increased vegetable crop yields.
Intervention effect Cover crops decreased silage corn yield.
Intervention effect Grain corn yield did not decrease with cover crops.
Intervention effect Soybean yield did not decrease with cover crops.
Intervention effect Cover crops in no-tillage and plow tillage systems increased crop yield compared with the no-CC control.
Recommendation Crop yield response to cover crops might become more robust when pedo-climatic and agronomic factors are considered.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Chlorsulfuron did not decrease mature grain nutrient concentrations or grain yield.

Taxon: wheatTriticum aestivumt0
Treatment: Chlorsulfuron treatmente0
Outcome: nutrient concentrations in mature grain or grain yielde0
Direction: did not decreasee0

Not reportedComparator

Verbatim

e0
“Chlorsulfuron treatment did not decrease nutrient concentrations in mature grain or grain yield”
✓ located verbatim in the source · abstract, characters 639–734

t0
“wheat”
✓ located verbatim in the source · title, characters 70–75

Title

The impact of chlorsulfuron and diclofop-methyl on nutrient uptake by wheat.

LD Osborne; AD Robson; DG Bowran Australian Journal of Agricultural Research 1993. doi:10.1071/ar9931757

Other claims from this paper (11)

Intervention effect Chlorsulfuron decreased wheat shoot and root weights and root length in glasshouse experiments.
Intervention effect Chlorsulfuron decreased phosphorus uptake, particularly with low phosphorus supply.
Intervention effect Chlorsulfuron decreased potassium uptake.
Intervention effect Nitrogen, calcium and magnesium uptake was unaffected.
Intervention effect Field chlorsulfuron reduced shoot element concentrations during early growth by up to 30%.
Observation The reduction in shoot element concentrations faded as wheat aged.
Association Kulin was more sensitive to chlorsulfuron than Reeves.
Intervention effect Diclofop-methyl had little effect on shoot nutrient concentrations.
Intervention effect Diclofop-methyl reduced zinc and copper concentrations during vegetative growth.
Intervention effect Diclofop-methyl reduced copper concentration in mature Kulin grain.
Intervention effect Herbicides reduced uptake of diffusion-moved nutrients more than mass-flow nutrients.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Yield did not decrease in the first year without fertilization.

Taxon: winter wheat and summer maizeTriticum aestivum Zea mayse0
Treatment: without fertilizatione2
Outcome: yielde2
Direction: did not decreasee2

Not reportedComparator

Verbatim

e0
“comprising winter wheat and summer maize as an annual rotation”
✓ located verbatim in the source · abstract, characters 479–541

e2
“The yield did not decrease in the first year without fertilization but started to decrease considerably in later years”
✓ located verbatim in the source · abstract, characters 1046–1164

Title

Long-term legacy impacts of nitrogen fertilization on crop yield, nitrate accumulation, and nitrogen recovery efficiency

Shuang Lei; Sajjad Raza; Annie Irshad; et al. European Journal of Agronomy 2025. doi:10.1016/j.eja.2025.127513

Other claims from this paper (11)

Intervention effect N fertilization increased grain yield compared with the control.
Intervention effect DCD addition caused additional increases in grain yield, mainly at 500 kg N ha-1.
Intervention effect Yield started to decrease considerably in later years without fertilization.
Intervention effect N fertilization increased grain N uptake by more than 100 % compared with the control in fertilized years and the first unfertilized year.
Intervention effect Grain N uptake decreased strongly in the second year without fertilization.
Intervention effect Cumulative fertilizer N recovery did not differ among N fertilized treatments during fertilized years.
Intervention effect Cumulative fertilizer N recovery increased strongly when N uptake in unfertilized years was incorporated.
Intervention effect Cumulative fertilizer N recovery in N340 + DCD increased from 37 %–44 % in fertilized years to 74 %–80 % in unfertilized years.
Observation A residual nitrate accumulation of 237–489 kg N ha-1 accumulated in the soil profile after two years of fertilization.
Intervention effect Residual N accumulation decreased by 31 %–41 % in the first unfertilized year.
Observation Soil N accumulation became less than 60 kg ha-1 after four years of cropping without fertilization, with no difference among treatments including control.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

The four legume species did not decrease intercropped wheat grain yield.

Taxon: wheatTriticum aestivume0
Treatment: the four speciese0
Outcome: grain yielde0
Direction: did not decreasee0

Not reportedComparator

Verbatim

e0
“the four species did not decrease intercropped wheat grain yield”
✓ located verbatim in the source · abstract, characters 943–1007

Title

Association relais blé / légumineuse fourragère en sytème céréalier biologique : une réponse pour le contrôle des adventices et la nutrition azotée des cultures.

Amossé, Camille; Celette, Florian; Jeuffroy, Marie-Hélène; et al. Organic Eprints (International Centre for Research in Organic Food Systems, and Research Institute of Organic Agriculture) 2013. doi:10.17180/t3en-3w92

Other claims from this paper (4)

Intervention effect Black medic and red clover were likely to reduce wheat grain protein content by 0.3 to 0.4%.
Intervention effect The legume cover crops controlled weed infestation during wheat intercropping.
Intervention effect The legume cover crops controlled weed infestation between the two cash crops.
Intervention effect Nitrogen restitution from legume cover crops significantly increased subsequent maize grain yield by 30%.

Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Slightly damaged wheat fields had no actual yield decrease.

Taxon: wheatTriticum aestivumt0
Outcome: yielde0
Direction: not founde0
Setting: slightly damaged fielde0

Verbatim

e0
“Actual decrease in yield was not found in the slightly damaged field”
✓ located verbatim in the source · abstract, characters 1794–1862

t0
“wheat plants”
✓ located verbatim in the source · title, characters 23–35

Title

On the frost damage of wheat plants occured at Tokorozawa district, Saitama prefecture in 1955

Y. OKAMOTO; Y. KANZAKI; H. INOUE; et al. Journal of Agricultural Meteorology 1956. doi:10.2480/agrmet.12.13

Other claims from this paper (16)

Observation Frost killed young ears in low winter type wheat and induced late tiller ears and delayed heading.
Observation Frost caused 68.3% dead stems in the severely damaged field.
Observation Frost caused 48.1% dead stems in the intermediately damaged field.
Observation Frost caused 23.3% dead stems in the lightly damaged field.
Association Damage differences were likely related to growth and developmental stage.
Observation Damage changed late stem number, stem length and stem diameter.
Observation Damage delayed wheat heading.
Association Frost damage degree correlated strongly with changed morphological characters and those characters correlated with each other.
Observation Frost decreased complete grains and their proportion.
Observation Frost increased incomplete grain quantity.
Observation Frost decreased thousand grain weight.
Observation Intermediate damage reduced wheat yield by about 30%.
Observation Severe damage reduced wheat yield by about 70%.
Mechanism Late stems produced grains that compensated for yield losses to differing degrees.
Method / resource Late stem productivity may estimate frost related wheat yield loss.
Association Late stem productivity correlated significantly with delayed heading days, stem length and stem diameter.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Tine cultivation did not decrease winter wheat yield.

Taxon: winter wheatTriticum aestivumt0
Treatment: Tine cultivatione0
Outcome: yielde0
Direction: did not decreasee0
Comparator: ploughinge0

Verbatim

e0
“Tine cultivation incorporated less straw than ploughing, decreased plant establishment and early growth but did not decrease yield”
✓ located verbatim in the source · abstract, characters 544–674

t0
“winter wheat”
✓ located verbatim in the source · title, characters 99–111

Title

The effects of straw disposal and depth of cultivation on the growth, nutrient uptake and yield of winter wheat on a clay and a silt soil

D. G. Christian; E. T. G. Bacon Soil Use and Management 1991. doi:10.1111/j.1475-2743.1991.tb00877.x

Other claims from this paper (7)

Intervention effect Tine cultivation incorporated less straw than ploughing.
Intervention effect Tine cultivation decreased plant establishment and early growth of winter wheat compared with ploughing.
Intervention effect Direct-drilling through chopped straw decreased winter wheat yield on the silt loam.
Intervention effect Direct-drilling through chopped straw did not decrease winter wheat yield on the clay soil.
Intervention effect Short straw (< 5 cm) was easier to incorporate than longer straw.
Intervention effect Ploughing was the most efficient method of straw incorporation because it inverts soil.
Association Early effects on crop growth and nutrient uptake following straw incorporation were transient and associated with large amounts of straw in the seeded layer of soil.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Excess fertilization did not significantly decrease yield.

Taxon: wheatTriticum aestivumt0
Treatment: excessive fertilizatione0
Outcome: yielde0
Direction: decreasede0

Not reportedComparator

Verbatim

e0
“The yield is not significantly decreased under the excessive fertilization.”
✓ located verbatim in the source · abstract, characters 1084–1159

t0
“wheat yield”
✓ located verbatim in the source · title, characters 38–49

Title

Effects of N,P and K fertilization on wheat yield and fertilizer use efficiency in Weibei rainfed highland

Zuoping Zhao Journal of Plant Nutrition and Fertilizer 2013

Other claims from this paper (12)

Intervention effect Nitrogen increased wheat yield by 986 kg/ha (30.0%).
Intervention effect Phosphorus increased wheat yield by 679 kg/ha (18.9%).
Intervention effect Potassium increased wheat yield by 405 kg/ha (9.5%).
Observation N2P2K2 was the best treatment across yield, profit, FCR and AE.
Intervention effect Balanced fertilization increased yield by 73.0% versus CK.
Intervention effect Balanced fertilization increased profit by 1923 Yuan/ha versus CK.
Observation Balanced fertilization had FCR of 40.0%.
Observation Balanced fertilization had AE of 5.8 kg/kg.
Observation N use efficiency decreased significantly compared with the 1980s.
Observation P2O5 use efficiency remained basically the same compared with the 1980s.
Observation K2O use efficiency increased rapidly compared with the 1980s.
Recommendation Rational fertilization, farming and cultivation should be combined to raise wheat yield and profit.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

At low versus high sowing density, grain yield in modern wheat cultivars did not decrease significantly.

Taxon: common wheatTriticum aestivumt0
Material: modern cultivarse0
Treatment: low sowing densitye0
Outcome: grain yielde0
Direction: did not decreasee0
Comparator: high sowing densitye0

Verbatim

e0
“Compared to high sowing density, in modern cultivars grain yield did not decrease significantly with low sowing density”
✓ located verbatim in the source · abstract, characters 905–1024

t0
“common wheat”
✓ located verbatim in the source · title, characters 73–85

Title

Grain yield and competitive ability against weeds in modern and heritage common wheat cultivars are differently influenced by sowing density

Mariateresa Lazzaro; Ambrogio Costanzo; Dalia Hosam Farag; et al. Italian Journal of Agronomy 2017. doi:10.4081/ija.2017.901

Other claims from this paper (8)

Intervention effect Single cultivars and mixtures did not differ significantly in grain yield and weed suppression.
Intervention effect At low versus high sowing density, grain yield increased 15.6% in heritage wheat cultivars.
Intervention effect Plant lodging in heritage wheat cultivars was 21.5% lower at low sowing density.
Intervention effect Weed biomass increased at low sowing density in heritage wheat crop stands.
Intervention effect Weed biomass increased at low sowing density in modern wheat crop stands.
Association Heritage wheat crop stands had 56% lower weed biomass on average than modern stands.
Association At low sowing density, heritage wheat stands had weed biomass of 6.82±1.50 g m–2, lower than modern stands.
Recommendation The authors advise lower sowing density for heritage wheat crop stands to retain productivity, reduce lodging and control weeds.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Under optimal moisture, mixture yield did not decrease because spring wheat yield increased.

Taxon: spring wheatTriticum aestivume0
Outcome: total yield of the mixturee0
Direction: did not decreasee0
Qualifier: With optimal moisturee0

Not reportedTreatmentComparator

Verbatim

e0
“With optimal moisture, they reduced the yield of the vetch sowing, but the total yield of the mixture did not decrease due to the increase in the yield of spring wheat.”
✓ located verbatim in the source · abstract, characters 174–342

Title

INFLUENCE OF MOISTURE CONDITIONS AND NITROGEN FERTILIZERS ON THE YIELD STRUCTURE AND YIELD OF THE VETCH-WHEAT MIXTURE COMPONENTS IN THE SOD-PODZOLIC SANDY LOAM SOIL OF THE KALUGA REGION

Timirâzevskaâ selʹskohozâjstvennaâ akademiâ; V.K. Khramoy; A. A. Kirichenko International Scientific Conference 2021. doi:10.26897/978-5-9675-1855-3-2021-58

Other claims from this paper (4)

Intervention effect Under moisture deficit, nitrogen fertilizers had no significant effect on sowing vetch yield.
Intervention effect Under moisture deficit, nitrogen fertilizers increased mixture yield through spring wheat.
Intervention effect Under optimal moisture, nitrogen fertilizers reduced vetch yield.
Intervention effect Under optimal moisture, nitrogen fertilizers increased spring wheat yield.

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“yield decrease”

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