Search claims · PlantClaims

Associationauthor interpretationoriginal resultnegativeprojected

Claim · model-written summary

Projected precipitation decline in northwestern Halkidiki may decrease olive yield through higher water needs.

Taxon: OliveOlea europaeat0
Outcome: yielde1
Direction: decreasee1
Qualifier: possiblee1
Setting: northwestern Halkidikie1

Verbatim

e1
“Precipitation is projected to decrease in northwestern Halkidiki, leading to enhanced water needs and resulting in a possible decrease in yield”
✓ located verbatim in the source · abstract, characters 395–538

t0
“Olive Crop Production in Halkidiki”
✓ located verbatim in the source · title, characters 32–66

Title

The Impact of Climate Change on Olive Crop Production in Halkidiki, Greece

Ilias Kalfas; Christina Anagnostopoulou; Errikos Michail Manios 16th International Conference on Meteorology, Climatology and Atmospheric Physics—COMECAP 2023 2023. doi:10.3390/environsciproc2023026069

Other claims from this paper (2)

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Regulated deficit irrigation did not decrease olive fruit yield.

Taxon: olive treesOlea europaeae0
Treatment: RDI strategye3
Outcome: fruit yielde3
Direction: did not decreasee3
Comparator: full irrigatione6

Verbatim

e3
“The RDI strategy did not decrease the fruit yield despite the fact that olive weight tended to decrease, and it increased the oil yield by ~14.5%”
✓ located verbatim in the source · abstract, characters 933–1078

e6
“full irrigation (FI, 100% of ETc)”
✓ located verbatim in the source · abstract, characters 414–447

e0
“olive trees cv Arbosana”
✓ located verbatim in the source · abstract, characters 562–585

Title

Ripening Indices, Olive Yield and Oil Quality in Response to Irrigation With Saline Reclaimed Water and Deficit Strategies

Cristina Romero-Trigueros; Gaetano Alessandro Vivaldi; Emilio Nicolás Nicolás; et al. Frontiers in Plant Science 2019. doi:10.3389/fpls.2019.01243

Other claims from this paper (17)

Intervention effect Reclaimed water without water restriction increased olive fruit yield by 35% compared with control trees.
Intervention effect Reclaimed water without water restriction did not result in higher olive oil yield.
Intervention effect Regulated deficit irrigation tended to decrease olive weight.
Intervention effect Regulated deficit irrigation increased olive oil yield by about 14.5%.
Intervention effect Combined reclaimed water and deficit irrigation did not decrease olive fruit yield.
Intervention effect Combined reclaimed water and deficit irrigation significantly reduced olive oil yield by 25% in 2018.
Intervention effect Combined reclaimed water and deficit irrigation strongly reduced oil content per fruit dry weight by 40%.
Intervention effect Both RDI treatments lowered acidity levels in olive paste compared with full irrigation treatments.
Intervention effect Both RDI treatments reduced oil extractability and fatty yield.
Intervention effect Reclaimed water exposure decreased olive oil quality.
Intervention effect Reclaimed water exposure reduced oleic acid in olive oil.
Intervention effect Reclaimed water exposure increased the C18:2/C18:3 ratio in olive oil.
Intervention effect Reclaimed water exposure increased peroxides in olive oil.
Intervention effect Reclaimed water improved total polyphenols in olive.
Intervention effect Regulated deficit irrigation improved total polyphenols in olive.
Observation In all cases the olive oil parameters met the legislation.
Recommendation Reclaimed water and regulated deficit irrigation have potential to manage olive oil production.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Intercropping did not decrease olive tree yield compared with olive monoculture.

Taxon: olive treeOlea europaeae0
Treatment: all intercropping cropse0
Outcome: olive tree yielde0
Direction: did not decreasee0
Comparator: monoculturee0

Verbatim

e0
“The results showed that all intercropping crops did not decrease the olive tree yield compared to the olive tree in monoculture”
✓ located verbatim in the source · abstract, characters 953–1080

Title

The effect of intercropping crop type on soil fertility, olive trees productivity and quality in Moroccan agroforestry systems

Inass Zayani; Mohammed Ammari; Laïla Ben Allal; et al. Vegetos 2025. doi:10.1007/s42535-024-01132-7

Other claims from this paper (4)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Regulated deficit irrigation tended to decrease olive weight.

Taxon: olive treesOlea europaeae0
Treatment: RDI strategye3
Outcome: olive weighte3
Direction: tended to decreasee3
Comparator: full irrigatione6

Verbatim

e3
“The RDI strategy did not decrease the fruit yield despite the fact that olive weight tended to decrease, and it increased the oil yield by ~14.5%”
✓ located verbatim in the source · abstract, characters 933–1078

e6
“full irrigation (FI, 100% of ETc)”
✓ located verbatim in the source · abstract, characters 414–447

e0
“olive trees cv Arbosana”
✓ located verbatim in the source · abstract, characters 562–585

Title

Ripening Indices, Olive Yield and Oil Quality in Response to Irrigation With Saline Reclaimed Water and Deficit Strategies

Cristina Romero-Trigueros; Gaetano Alessandro Vivaldi; Emilio Nicolás Nicolás; et al. Frontiers in Plant Science 2019. doi:10.3389/fpls.2019.01243

Other claims from this paper (17)

Intervention effect Reclaimed water without water restriction increased olive fruit yield by 35% compared with control trees.
Intervention effect Reclaimed water without water restriction did not result in higher olive oil yield.
Intervention effect Regulated deficit irrigation did not decrease olive fruit yield.
Intervention effect Regulated deficit irrigation increased olive oil yield by about 14.5%.
Intervention effect Combined reclaimed water and deficit irrigation did not decrease olive fruit yield.
Intervention effect Combined reclaimed water and deficit irrigation significantly reduced olive oil yield by 25% in 2018.
Intervention effect Combined reclaimed water and deficit irrigation strongly reduced oil content per fruit dry weight by 40%.
Intervention effect Both RDI treatments lowered acidity levels in olive paste compared with full irrigation treatments.
Intervention effect Both RDI treatments reduced oil extractability and fatty yield.
Intervention effect Reclaimed water exposure decreased olive oil quality.
Intervention effect Reclaimed water exposure reduced oleic acid in olive oil.
Intervention effect Reclaimed water exposure increased the C18:2/C18:3 ratio in olive oil.
Intervention effect Reclaimed water exposure increased peroxides in olive oil.
Intervention effect Reclaimed water improved total polyphenols in olive.
Intervention effect Regulated deficit irrigation improved total polyphenols in olive.
Observation In all cases the olive oil parameters met the legislation.
Recommendation Reclaimed water and regulated deficit irrigation have potential to manage olive oil production.

Mechanismhypothesisoriginal resultnegativebasis n/a

Claim · model-written summary

Photosynthetic damage may result in a possible decrease in growth and yield of olive plants attacked by Saissetia oleae.

Taxon: Olea europaeaOlea europaeat0
Outcome: decrease in growth and yielde7
Qualifier: damages to the photosynthetic apparatuse7

Verbatim

t0
“Olea europaea”
✓ located verbatim in the source · title, characters 25–38

e7
“The increase of initial fluorescence, reduction of maximum photochemical quantum yield of photosystem II/maximum fluorescence, and electron transport rate in some cultivars of O. europaea attacked by S. oleae indicate damages to the photosynthetic apparatus, resulting in a possible decrease in growth and yield of the plants.”
✓ located verbatim in the source · abstract, characters 1563–1889

Title

Physiological Aspects of Olea europaea (Oleaceae) Attacked by Saissetia oleae (Hemiptera: Coccidae)

Marinalva Martins dos Santos; Letícia Alves Carvalho Reis; Evander Alves Ferreira; et al. Florida Entomologist 2022. doi:10.1653/024.105.0305

Other claims from this paper (6)

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Combined reclaimed water and deficit irrigation did not decrease olive fruit yield.

Taxon: olive treesOlea europaeae0
Treatment: combination of both stresses (RW and RDI)e4
Outcome: fruit yielde4
Direction: neither did decreasee4
Comparator: control treese1

Verbatim

e4
“The combination of both stresses (RW and RDI) neither did decrease the fruit yield; however, it significantly reduced oil yield (25% less in 2018)”
✓ located verbatim in the source · abstract, characters 1080–1226

e1
“RW without water restrictions increased the fruit yield by 35% due to a slight increase in the fruit weight and, mainly, to a greater fruit set than the control trees”
✓ located verbatim in the source · abstract, characters 647–813

e0
“olive trees cv Arbosana”
✓ located verbatim in the source · abstract, characters 562–585

Title

Ripening Indices, Olive Yield and Oil Quality in Response to Irrigation With Saline Reclaimed Water and Deficit Strategies

Cristina Romero-Trigueros; Gaetano Alessandro Vivaldi; Emilio Nicolás Nicolás; et al. Frontiers in Plant Science 2019. doi:10.3389/fpls.2019.01243

Other claims from this paper (17)

Intervention effect Reclaimed water without water restriction increased olive fruit yield by 35% compared with control trees.
Intervention effect Reclaimed water without water restriction did not result in higher olive oil yield.
Intervention effect Regulated deficit irrigation did not decrease olive fruit yield.
Intervention effect Regulated deficit irrigation tended to decrease olive weight.
Intervention effect Regulated deficit irrigation increased olive oil yield by about 14.5%.
Intervention effect Combined reclaimed water and deficit irrigation significantly reduced olive oil yield by 25% in 2018.
Intervention effect Combined reclaimed water and deficit irrigation strongly reduced oil content per fruit dry weight by 40%.
Intervention effect Both RDI treatments lowered acidity levels in olive paste compared with full irrigation treatments.
Intervention effect Both RDI treatments reduced oil extractability and fatty yield.
Intervention effect Reclaimed water exposure decreased olive oil quality.
Intervention effect Reclaimed water exposure reduced oleic acid in olive oil.
Intervention effect Reclaimed water exposure increased the C18:2/C18:3 ratio in olive oil.
Intervention effect Reclaimed water exposure increased peroxides in olive oil.
Intervention effect Reclaimed water improved total polyphenols in olive.
Intervention effect Regulated deficit irrigation improved total polyphenols in olive.
Observation In all cases the olive oil parameters met the legislation.
Recommendation Reclaimed water and regulated deficit irrigation have potential to manage olive oil production.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

High salinity tolerance was associated with decreased olive yield.

Taxon: OliveOlea europaeat0
Treatment: high-salinitye0
Outcome: olive yielde0
Direction: decreasee0

Not reportedComparator

Verbatim

t0
“Olive”
✓ located verbatim in the source · title, characters 78–83

e0
“the high-salinity tolerance caused to decrease for olive yield”
✓ located verbatim in the source · abstract, characters 1087–1149

Title

Effects of Salinity and Calcium on the Growth, Ion Concentration and Yield of Olive (Olea europaea L.) Trees

A Lolaei; Mohammad Ali Rezaei; Mojtaba Khorrami Raad; et al. Annals of biological research 2012

Other claims from this paper (11)

Intervention effect Annual and accumulated yield were affected by salts.
Intervention effect Fruit size and vegetative growth ratio were affected by salts.
Intervention effect Shoot length was higher in plants treated with CaCl2.
Intervention effect Shoot growth was reduced at 50 mg/L NaCl.
Association NaCl concentrations in plants were affected by Ca2+, K+ and N concentration.
Intervention effect Ca2+ supply linearly increased leaf Ca2+ concentration.
Intervention effect Ca2+ supply decreased leaf Na+ concentration.
Intervention effect Leaf Ca2+, K+ and N decreased under salt stress.
Intervention effect Salt stress caused a significant reduction in plant growth and leaf number and weight.
Observation The high-Ca tolerance index for yield was effective in screening for high fruit number and high yield of olive.
Intervention effect CaCl2 and salinity significantly affected yield and growth of olive plants.

Observationobservedoriginal resultprojected

Claim · model-written summary

Western European olive yield is projected to decline by up to 45%.

Taxon: oliveOlea europaeae0 t0
Outcome: yielde0 t0
Direction: decreasee0 t0
Value: −45%e0 t0

Verbatim

e0
“a yield decrease (down to −45%)”
✓ located verbatim in the source · abstract, characters 1469–1500

t0
“Climate change projections for olive yields in the Mediterranean Basin”
✓ located verbatim in the source · title, characters 0–70

Title

Climate change projections for olive yields in the Mediterranean Basin

Helder Fraga; Joaquim G. Pinto; Francesco Viola; et al. International Journal of Climatology 2019. doi:10.1002/joc.6237

Other claims from this paper (17)

Observation Past olive growing season length was higher at lower latitudes.
Observation Past olive yields were lower in inner south Iberia and higher in Italy and Greece.
Observation Southern Iberia had higher growing season temperature and lower precipitation.
Observation Southern Iberia had higher potential evapotranspiration.
Observation Southern Iberia had lower actual evapotranspiration.
Observation Southern Iberia had stronger water demand.
Observation Past water productivity had similar ranges across Europe.
Observation Future olive growing season length is projected to increase.
Observation Future growing season temperature is projected to increase up to 3°C.
Observation Western European growing season precipitation is projected to decrease.
Observation Western European water demand is projected to rise.
Observation Eastern European precipitation is projected to rise slightly.
Observation Eastern European water demand is projected to decline.
Observation Eastern European olive yield is projected to increase by up to 15%.
Observation Olive water productivity is projected to remain mostly unchanged.
Observation Climate change may threaten olive orchard viability in southern Iberia and parts of Italy.
Recommendation The authors call for timely adaptation planning for the olive sector.

Observationobservedoriginal resultmeasured

Claim · model-written summary

Excessive salinization decreased yield.

Taxon: Olea europaea L.Olea europaeae1
Treatment: excessive salinizatione0
Outcome: yielde0
Direction: decreasee0

Verbatim

e0
“excessive salinization caused an increase in the Na level in the leaves, gas exchange, growth retardation and a decrease in yield”
✓ located verbatim in the source · abstract, characters 989–1118

e1
“Olea europaea L.”
✓ located verbatim in the source · abstract, characters 548–564

Title

Effects of Environmental Variability on the Genus Olea L.

Leyla Atayeva; Sariye Ahmadova; Lala Nasirli; et al. BIO Web of Conferences 2025. doi:10.1051/bioconf/202515104025

Other claims from this paper (9)

Observation Irrigation water EC was 5.46 mS/cm.
Observation Excessive salinization increased leaf Na level.
Observation Excessive salinization increased gas exchange.
Observation Excessive salinization retarded growth.
Observation The species adapts to arid climates.
Observation Water deficit and high temperatures create environmental stress affecting the plant.
Observation Trunks and branches were infected with Saissetia oleae Olivier.
Observation S.oleae colonies showed life cycle differences under climate change.
Observation S.oleae colonies showed increased insecticide resistance under climate change.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Water addition decreased olive oil yield.

Taxon: oliveOlea europaeat0
Treatment: Water additione0
Outcome: oil yielde0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“Water addition caused a decrease in oil yield and extractability”
✓ located verbatim in the source · abstract, characters 633–697

t0
“Effect of talc and water addition on olive oil quality and antioxidants”
✓ located verbatim in the source · title, characters 0–71

Title

Effect of talc and water addition on olive oil quality and antioxidants

Ana I. Carrapiso; Amparo García; M. Jesús Petrón; et al. European Journal of Lipid Science and Technology 2013. doi:10.1002/ejlt.201200252

Other claims from this paper (10)

Intervention effect Water addition decreased olive oil extractability.
Intervention effect Water addition increased the peroxide index of olive oil.
Intervention effect Water addition decreased K 270 in olive oil.
Intervention effect Water addition decreased total phenol content of olive oil.
Intervention effect Water addition scarcely affected instrumental color.
Intervention effect Talc addition increased olive oil yield and extractability.
Intervention effect Talc addition decreased the peroxide index of olive oil.
Intervention effect Talc addition decreased α‐tocopherol content of olive oil.
Intervention effect Talc addition markedly affected instrumental color.
Recommendation Water addition at 42.9% w/w is not advisable for the two olive cultivars.

“yield decrease”

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