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“yield decrease”

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plus 6 earlier · 1930s

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Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Reducing solution volume to 60 l m-2 did not negatively affect yield.

Taxon: spinachSpinacia oleraceae1
Treatment: Reduction of the volume of the solution to 60 l m-2 of cultivated areae0
Outcome: yielde0
Direction: without negative effecte0

Not reportedComparator

Verbatim

e0
“Reduction of the volume of the solution to 60 l m-2 of cultivated area induced a decrease in nitrate accumulation without negative effect on yield”
✓ located verbatim in the source · abstract, characters 1004–1150

e1
“spinach was grown in summer and autumn”
✓ located verbatim in the source · abstract, characters 402–440

Title

Growing spinach in a floating system with different volumes of aerated or non-aerated nutrient solution

Lenzi, A.; Baldi, A.; Tesi, R. Florence Research (University of Florence) 2019. doi:10.13128/ahs-12780

Other claims from this paper (8)

Observation Non-aerated solution oxygen fell to 1.92 mg l-1 in summer.
Observation Non-aerated solution oxygen fell to 2.83 mg l 1 in autumn.
Observation Aeration kept solution oxygen at 7-8 mg l-1.
Intervention effect Hypoxia did not affect spinach yield.
Intervention effect Hypoxia did not reduce spinach nitrate accumulation.
Intervention effect In summer, aeration significantly lowered leaf nitrate content.
Intervention effect Reducing solution volume to 60 l m-2 decreased nitrate accumulation.
Association The aeration by volume interaction was not significant.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Rennan retained protein content at 13.0% under drought.

Taxon: winter wheatTriticum aestivumt0
Material: Rennane0
Treatment: droughte0
Outcome: PCe0
Direction: retainede0
Value: 13.0%e0

Not reportedComparator

Verbatim

e0
“Rennan showed decrease of yield in drought (from 6.96 to 5.15 t/ha), but retained PC (13.0%).”
✓ located verbatim in the source · abstract, characters 988–1081

t0
“drought during the grain filling period to the yield and quality of winter wheat”
✓ located verbatim in the source · title, characters 13–93

Title

Influence of drought during the grain filling period to the yield and quality of winter wheat (T. aestivum L.).

Marijana Barić; Snježana Kereša; Hrvoje Šarčević; et al. 2006

Other claims from this paper (18)

Intervention effect Drought decreased genotype yields by 11.1 to 49.8% relative to controls.
Intervention effect Protein content increased by 1.8% for some genotypes under drought.
Intervention effect Divana yield changed little under drought, from 5.31 to 5.23 t/ha, and was lowest under both conditions.
Intervention effect Divana protein content was similar under control and drought, 15.8 and 16.0%.
Intervention effect Rennan yield decreased from 6.96 to 5.15 t/ha under drought.
Intervention effect Banica, Kuna, Golubica and Žitarka had decreased yields under drought.
Intervention effect Banica, Kuna, Golubica and Žitarka had increased protein content under drought.
Observation Golubica had the highest protein content in drought at 16.2%.
Observation Kuna had high protein content in drought at 15.9%.
Intervention effect Mean yield decreased by 1.59 t/ha under drought.
Intervention effect Mean thousand grain weight decreased by 5.17 g under drought.
Intervention effect Mean gluten index decreased by 4.59% under drought.
Intervention effect Mean protein content increased by 0.45% under drought.
Intervention effect Mean test weight increased by 1.02 kg/hl under drought.
Intervention effect Mean sedimentation volume increased by 1.3 ml under drought.
Intervention effect Mean wet gluten content increased by 1.35% under drought.
Intervention effect Mean falling number increased by 36.97 under drought.
Recommendation The authors consider genotypes with stable yield and high protein suitable for production under water stress.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Other cultivar combinations showed no statistically significant change in grain yield

Taxon: wheatTriticum aestivume0
Treatment: combinationse3
Outcome: grain yielde3
Direction: no_changeinferrede3

Not reportedComparator

Verbatim

e0
“Mixtures composed of five wheat cultivars, Jingshuang 16, Jing 411, Jingdong 8, Lunxuan 987, and Baofeng 104”
✓ located verbatim in the source · abstract, characters 0–108

e3
“The differences of the increases or decreases were not statistically significant except combinations Jing 411: Jingdong 8: Baofeng104, Jingshuang16: Jingdong8: Lunxuang 987 and Jingshuang 16: Jingdong 8: Lunxuan 987: Baofeng 104, which showed the decrease of the grain yield.”
✓ located verbatim in the source · abstract, characters 867–1142

Title

The Effect of Wheat Mixtures on the Powdery Mildew Disease and Some Yield Components

Ning LI; Shao-feng JIA; Xiu-na WANG; et al. Journal of Integrative Agriculture 2012. doi:10.1016/s2095-3119(12)60048-3

Other claims from this paper (5)

Intervention effect Certain wheat cultivar combinations showed positive efficacy on powdery mildew
Intervention effect Cultivar combinations tested in 2007 increased grain yield
Intervention effect Most cultivar combinations tested in 2010 did not increase grain yield
Intervention effect Three cultivar combinations decreased grain yield
Intervention effect Wheat cultivar mixtures did not influence the crude protein content of grain

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

The combination of M. brunneum and 3-octanone had no effect on potato yield.

Taxon: potatoSolanum tuberosumt0
Treatment: Combinations of M. brunneum and 3-octanonee2
Outcome: yielde3
Direction: no effecte3

Not reportedComparator

Verbatim

t0
“Wireworm-Infested Potato Field”
✓ located verbatim in the source · title, characters 119–149

e2
“Combinations of M. brunneum and 3-octanone were also found to significantly decrease wireworm damage”
✓ located verbatim in the source · abstract, characters 1208–1308

e3
“while no effect on yield was reported, resulting in an increased saleable mass over controls (p < 0.001)”
✓ located verbatim in the source · abstract, characters 1322–1426

Title

Evaluation of Metarhizium brunneum- and Metarhizium-Derived VOCs as Dual-Active Biostimulants and Pest Repellents in a Wireworm-Infested Potato Field

Martyn J. Wood; Alexandra M. Kortsinoglou; James C. Bull; et al. Journal of Fungi 2023. doi:10.3390/jof9060599

Other claims from this paper (5)

Intervention effect M. brunneum application significantly decreased wireworm burden in potato in the Wales field trial.
Intervention effect Derived VOC application significantly decreased wireworm burden in potato in the Wales field trial.
Intervention effect The combination of M. brunneum and 3-octanone significantly decreased wireworm damage in potato.
Intervention effect The combination of M. brunneum and 3-octanone increased saleable potato mass over controls (p < 0.001).
Recommendation The stimulate-and-deter strategy can significantly enhance saleable potato yields and control wireworm populations.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Second-year converted plots did not differ significantly from continued sowing plots in growth and yield.

Taxon: riceOryza sativae0
Treatment: second year plots after converted from transplanting culturee0
Outcome: growth and yielde0
Direction: No significant differencese0
Comparator: continued direct sowing plotse0

Verbatim

e0
“No significant differences in the growth and yield of direct sowing rice could be found between the second year plots after converted from transplanting culture and the continued direct sowing plots.”
✓ located verbatim in the source · abstract, characters 808–1007

Title

The Alternation of Direct Sowing and Transplanting as a Counterplan for the Rice Yield Decrease due to Continuance of Direct Sowing Culture

Yoshimasa UEMURA; Akira MIYASAKA Japanese Journal of Crop Science 1977. doi:10.1626/jcs.46.414

Other claims from this paper (8)

Intervention effect First-year converted plots had better rice growth than long-term direct sowing plots.
Intervention effect First-year converted plots had better rice yield than long-term direct sowing plots.
Association The first-year growth and yield advantage was more apparent in well-drained fields.
Intervention effect Conversion increased total inorganic available nitrogen in soil early in the first year.
Intervention effect Conversion decreased soil nitrate nitrogen early in the first year.
Intervention effect Postharvest direct sowing soil drained and harrowed more easily and had more porosity than transplanted soil.
Observation The soil physical properties of direct sowing appeared in the first year after conversion.
Recommendation The authors concluded that alternating direct sowing and transplanting could counter the yield decline.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Reducing nitrogen left grain quality unaffected.

Taxon: wheatTriticum aestivumt0
Treatment: Reducing N fertilizatione0
Outcome: grain qualitye0
Direction: unaffectede0

Not reportedComparator

Verbatim

e0
“Reducing N fertilization resulted in a yield decrease of approximately 20%, while grain quality remained unaffected”
✓ located verbatim in the source · abstract, characters 1114–1229

t0
“wheat”
✓ located verbatim in the source · title, characters 123–128

Title

Reduced nitrogen fertilization combined with microbial bio-inputs restores soil bacterial functional profiles and sustains wheat performance

Audrey Pecourt; Audrey Bertrand; Manuella Catterou; et al. The Science of The Total Environment 2026. doi:10.1016/j.scitotenv.2026.181886

Other claims from this paper (10)

Intervention effect Reducing nitrogen decreased wheat yield by about 20%.
Intervention effect Sphingomonas sediminicola Dae20 partially compensated for yield loss.
Intervention effect The Bacillus supernatant partially compensated for yield loss.
Intervention effect Combined bio-inputs restored yield to conventional fertilization levels.
Intervention effect Combined bio-inputs did not increase grain nitrogen concentration.
Intervention effect Combined bio-inputs did not increase grain protein concentration.
Observation Bacterial diversity remained stable across treatments.
Observation Soil microbial metabolic activity declined sharply at the crop cycle end in untreated soils.
Observation Soil functional richness declined sharply at the crop cycle end in untreated soils.
Intervention effect Bio-input treated soils maintained microbial metabolic activity and functional richness.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

ABA-deficient wilty pea stomatal conductance did not respond to liming.

Taxon: peaLathyrus oleraceuse0
Material: wiltye0
Treatment: liminge0
Outcome: g(s)e0
Direction: unresponsivee0

Not reportedComparator

Verbatim

e0
“g(s) of the ABA-deficient mutant pea wilty was unresponsive to liming”
✓ located verbatim in the source · abstract, characters 1354–1423

Title

Liming can decrease legume crop yield and leaf gas exchange by enhancing root to shoot ABA signalling

Shane A. Rothwell; E. David Elphinstone; Ian C. Dodd Journal of Experimental Botany 2015. doi:10.1093/jxb/erv042

Other claims from this paper (12)

Intervention effect Recommended liming reduced field bean pod yield by about 30%.
Intervention effect Liming reduced V. faba stomatal conductance by 63%.
Intervention effect Liming reduced bean stomatal conductance by 26%.
Intervention effect Liming reduced pea stomatal conductance by 59%.
Intervention effect Liming reduced shoot dry biomass by 16–24% across the three legume species.
Observation Liming decreased phosphorus concentration in root xylem sap and leaves.
Association Lower phosphorus concentration correlated with lower stomatal conductance.
Intervention effect Superphosphate partly reversed the phosphorus decline.
Intervention effect Superphosphate partly reversed the stomatal-conductance decline.
Mechanism In pea, lime-induced low phosphorus appeared to raise systemic ABA and reduce leaf gas exchange.
Intervention effect Synthetic ABA supplied through the transpiration stream reduced detached pea-leaf transpiration.
Recommendation The authors question current liming recommendations.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Methanol use did not significantly change soybean grain yield.

Taxon: soybeanGlycine maxe1
Treatment: use of methanole4
Outcome: grain yielde5
Direction: no significant differencee5

Not reportedComparator

Verbatim

e1
“To investigate the effects of methanol on the yield and growth of soybean (Glysine max L.) in different conditions of irrigation”
✓ located verbatim in the source · abstract, characters 0–128

e4
“on the one hand increase in photosynthesis and dry matter production and the other hand relative accelerated flowering phase due to the use of methanol lead to decrease in remobilization time”
✓ located verbatim in the source · abstract, characters 943–1134

e5
“therefore no significant difference was observed in grain yield”
✓ located verbatim in the source · abstract, characters 1136–1199

Title

Effects of methanol on the yield and growth of soybean in different irrigation conditions

International Journal of Biosciences (IJB) 2014. doi:10.12692/ijb/4.8.160-168

Other claims from this paper (4)

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Up to 50% leaf removal did not change Hamlin yield, fruit number or fruit size.

Taxon: oranget0
Material: Hamline0
Treatment: removal of up to 50% of the leavese0
Outcome: fruit yield, fruit number, fruit sizee0
Direction: no effecte0

Not reportedComparator

Verbatim

e0
“In `Hamlin', removal of up to 50% of the leaves in late November had no effect on fruit yield, fruit number, fruit size, soluble solids yield, juice °Brix, and °Brix to acid ratio of juice the following year”
✓ located verbatim in the source · abstract, characters 276–483

t0
“Orange Tree”
✓ located verbatim in the source · title, characters 76–87

Title

Partial Defoliation Can Decrease Average Leaf Size but Has Little Effect on Orange Tree Growth, Fruit Yield and Juice Quality

Rongcai Yuan; Fernando Alferez; Igor Kostenyuk; et al. HortScience 2005. doi:10.21273/hortsci.40.7.2011

Other claims from this paper (7)

Intervention effect Up to 50% leaf removal did not change Hamlin soluble solids yield or juice measures.
Intervention effect Removing 50% of Valencia leaves decreased fruit yield and soluble solids yield.
Intervention effect Removing 50% of Valencia leaves did not affect Brix or Brix-to-acid ratio.
Intervention effect Removing 50% of leaves reduced new-flush leaf size in both cultivars.
Intervention effect Removing 50% of leaves had little effect on canopy size.
Intervention effect Removing 25% of canopy leaves had no measured effects.
Association Fruit weight increased with leaf area per fruit.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Drought stress applied this way did not reduce leaf lettuce yield.

Taxon: Leaf lettucee0
Treatment: drought stresse1
Outcome: yielde1
Direction: no_changeinferrede1
Qualifier: without reducinge1

Not reportedComparator

Verbatim

e0
“Leaf lettuce ( Lactuca sativa ) was grown hydroponically and subjected to rhizosphere drought stress by lowering the water level in the solution tub before harvesting”
✓ located verbatim in the source · abstract, characters 353–519

e1
“Appropriate drought stress using this method could increase AsA, polyphenol, and sugar content by 24%, 50%, and 17%, respectively, and decrease nitrate nitrogen content by 18% without reducing yield”
✓ located verbatim in the source · abstract, characters 521–719

Title

Augmentation of Antioxidant Constituents by Drought Stress to Roots in Leafy Vegetables

Ryohei Koyama; Hiromichi Itoh; Syuji Kimura; et al. HortTechnology 2012. doi:10.21273/horttech.22.1.121

Other claims from this paper (6)

Intervention effect Drought stress could increase ascorbic acid (AsA) content in leaf lettuce by 24%.
Intervention effect Drought stress could increase polyphenol content in leaf lettuce by 50%.
Intervention effect Drought stress could increase sugar content in leaf lettuce by 17%.
Intervention effect Drought stress could decrease nitrate nitrogen content in leaf lettuce by 18%.
Intervention effect Drought stress had similar effects on AsA content in four other plant species.
Recommendation The hydroponic drought stress method is proposed to raise leafy vegetable quality without reducing yield in controlled environments.

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“yield decrease”

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