Search claims · PlantClaims

Intervention effectobservedoriginal resultnegativenot significant (as stated)measured

Claim · model-written summary

Traffic on extremely compacted soil caused an additional yield decrease that was not significant in the first year.

Taxon: alfalfaMedicago sativae0
Treatment: harvest traffice0
Outcome: yielde0
Direction: decreasee0
Qualifier: extremely compacted soile0

Not reportedComparator

Verbatim

e0
“When harvest traffic was applied to alfalfa grown in extremely compacted soil there was an additional decrease in yield. It was not statistically significant the 1st yr”
✓ located verbatim in the source · abstract, characters 1290–1458

Title

Alfalfa Yield as Affected by Harvest Traffic and Soil Compaction in a Sandy Loam Soil

E. A. Rechel; B. D. Meek; W. R. DeTar; et al. jpa 1991. doi:10.2134/jpa1991.0241

Other claims from this paper (13)

Intervention effect A single post-swathing traffic event reduced first-year yield by 20% relative to no traffic.
Intervention effect The single traffic event reduced second-year yield by 16.5%.
Intervention effect The single traffic event reduced third-year yield by 14%.
Intervention effect Single-event traffic did not significantly differ from no traffic in fourth-year yield.
Intervention effect Typical grower traffic did not differ in first-year total yield from no traffic.
Intervention effect Typical grower traffic reduced total yield by 5 to 17% in the succeeding three years.
Intervention effect Moderate soil compaction reduced first-year seasonal yield by 12% relative to uncompacted soil.
Intervention effect Heavy soil compaction reduced first-year seasonal yield by 26% relative to uncompacted soil.
Intervention effect Third-year annual yield was the same across soil compaction degrees.
Intervention effect Traffic on extremely compacted soil reduced yield by 17.8% in 1987.
Intervention effect Traffic on extremely compacted soil reduced yield by 19.1% in 1988.
Recommendation The authors recommend tilling compacted soil before planting for optimal long-term alfalfa yield.
Recommendation The authors recommend operations that reduce traffic-exposed field area.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The reduction in tomato fruit yield was attributed to a decrease in fruit weight.

Taxon: tomatoSolanum lycopersicumt0
Outcome: fruit yielde2
Qualifier: a decrease in fruit weighte2

Verbatim

t0
“single-truss tomato grown in hydroponics”
✓ located verbatim in the source · title, characters 67–107

e2
“The reduction in fruit yield was due to a decrease in fruit weight but not in fruit number”
✓ located verbatim in the source · abstract, characters 476–566

Title

Effects of salinity at two ripening stages on the fruit quality of single-truss tomato grown in hydroponics

Y. Sakamoto; S. Watanabe; T. Nakashima; et al. The Journal of Horticultural Science and Biotechnology 1999. doi:10.1080/14620316.1999.11511174

Other claims from this paper (10)

Intervention effect Salinity at the immature green stage improved tomato fruit quality more than salinity at the decolouring stage.
Intervention effect Salinity at the immature green stage decreased tomato fruit yield more than salinity at the decolouring stage.
Observation Fruit number of tomato was not reduced by salinity.
Intervention effect Salinity increased the concentrations of soluble solids, citrate and ascorbic acid in tomato fruit.
Intervention effect Salinity increased the K concentration in tomato fruit.
Intervention effect Salinity increased chlorophyll a and chlorophyll b concentrations in tomato fruit.
Intervention effect Salinity increased lycopene and carotene concentrations in tomato fruit.
Intervention effect Salinity decreased or did not affect the absolute amount of these constituents per tomato fruit.
Mechanism Authors suggest that the salinity-induced improvement in tomato fruit quality is caused by reduced water import into the fruit.
Intervention effect Salinity applied at the earlier development stage was significantly more effective for tomato.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

T1 caused no decrease in yield, fruit weight or quality across three years.

Treatment: Treatment Tle0
Outcome: yield, fruit weight or fruit qualitye0
Direction: no decreasee0
Qualifier: over all three yearse0
Comparator: the controle0

Not reportedTaxon

Verbatim

e0
“Treatment Tl received about 30 cm less irrigation water than the control and showed no decrease in yield, fruit weight or fruit quality over all three years.”
✓ located verbatim in the source · abstract, characters 441–598

Title

Postharvest water stress of an early maturing plum

R. Scott Johnson; D. F. Handley; K. R. Day Journal of Horticultural Science 1994. doi:10.1080/00221589.1994.11516542

Other claims from this paper (11)

Intervention effect T1 saved about 30 cm of irrigation water.
Intervention effect T2 caused no decrease in productivity during the first two years.
Intervention effect Third-year T2 irrigation saved over 60 cm of applied water.
Observation Severe T2 stress caused extensive defoliation.
Observation Severe T2 stress caused shoot and scaffold dieback.
Observation Severe T2 stress reduced next-year yield.
Observation Double fruit formation was low across treatments.
Intervention effect Stress did not increase double fruit formation.
Observation Control stem water potential followed a consistent seasonal pattern.
Association Postharvest stem water potential correlated with following spring yield.
Recommendation Authors suggest stem water potential monitoring to prevent productivity loss while saving water.

Method / resourceobservedoriginal resultnegativeprojected

Claim · model-written summary

EPIC projected a corn yield decrease under the coarse scenario.

Taxon: cornZea mays subsp. mayst0
Direction: decreasee0
Comparator: coarse scenarioe0

Not reportedOutcomeValue

Verbatim

e0
“EPIC simulated a decrease for the coarse scenario but no change for the fine scale scenario”
✓ located verbatim in the source · abstract, characters 568–659

t0
“for wheat and corn”
✓ located verbatim in the source · abstract, characters 61–79

Title

Comparative responses of EPIC and CERES crop models to high and low spatial resolution climate change scenarios

L. O. Mearns; T. Mavromatis; E. Tsvetsinskaya; et al. Journal of Geophysical Research Atmospheres 1999. doi:10.1029/1998jd200061

Other claims from this paper (5)

Method / resource CERES projected moderate corn yield decreases under both scenarios.
Method / resource EPIC projected no change in corn yield under the fine scale scenario.
Method / resource The models also differed in simulated wheat yields.
Mechanism Model differences in yield arose from contrasting formation of final yield despite similar potential biomass simulation.
Method / resource Crop model type was identified as an uncertainty in impact assessment alongside climate scenario spatial resolution.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Leafhopper load up to 71.8 leafhopper-days per leaf did not decrease yield and fruit quality.

Taxon: Vitis viniferaVitis viniferae7
Treatment: leafhoppere1
Interactor: grape leafhopperEmpoasca vitise0pest
Outcome: yield and fruit qualitye1
Direction: No decreasee1

Not reportedComparator

Verbatim

e0
“The impact of the grape leafhopper”
✓ located verbatim in the source · abstract, characters 9–43

e7
“the grapevines, Vitis vinifera L.”
✓ located verbatim in the source · abstract, characters 148–181

e1
“No decrease in yield and fruit quality with leafhopper”
✓ located verbatim in the source · abstract, characters 1266–1320

Title

Grapevine leaf gas exchange, plant growth, yield, fruit quality and carbohydrate reserves influenced by the grape leafhopper, Empoasca vitis

M. P. Candolfi; M. Jermini; E. Carrera; et al. Entomologia Experimentalis et Applicata 1993. doi:10.1111/j.1570-7458.1993.tb01751.x

Other claims from this paper (9)

Intervention effect Photosynthesis and mesophyll conductance were severely reduced on main leaves showing leafhopper feeding symptoms.
Intervention effect Stomatal conductance of the red leaf section of infested main leaves was lower than on undamaged control leaves.
Intervention effect Transpiration rates of the red leaf section of infested main leaves were lower than on green parts of the same leaves and undamaged control leaves.
Intervention effect Gas exchange processes of lateral leaves were not affected by leafhopper feeding.
Association Leafhopper load on main leaves was correlated with visual damage symptoms.
Observation Up to 40% of the main leaf area of infested grapevines was discolored from the borders towards the center.
Observation Lateral leaves of grapevines showed no feeding symptoms.
Intervention effect Shoot diameter, pruning weight and carbohydrate reserves in the wood were not affected by leafhoppers.
Intervention effect Lateral leaf area growth of grapevines was significantly stimulated by leafhopper infestation.

Mechanismauthor interpretationoriginal resultnegativemeasured

Claim · model-written summary

The decrease in seed yield under stress was largely due to fewer pods and seeds per pod.

Taxon: cowpeaVigna unguiculatae0
Outcome: The decrease in seed yielde1
Qualifier: largely due to reductions in pods plant −1 and seeds pod −1e1

Verbatim

e0
“three cowpea [ Vigna unguiculata (L.) Walp.] genotypes”
✓ located verbatim in the source · abstract, characters 135–189

e1
“The decrease in seed yield was largely due to reductions in pods plant −1 and seeds pod −1”
✓ located verbatim in the source · abstract, characters 1921–2011

Title

Reproductive Abscission and Yield of Irrigated and Drought Stressed Cowpea

H. Tewolde; A. K. Dobrenz; D. L. Robinson; et al. Journal of Agronomy and Crop Science 1991. doi:10.1111/j.1439-037x.1991.tb00903.x

Other claims from this paper (17)

Observation Reproductive abscission of CA‐5 and AZ‐54 ranged between 68 and 76 % in the first experiment.
Observation Reproductive abscission of SPH ranged between 86 and 89 % in the first experiment.
Observation CA‐5 and AZ‐54 retained two to three pods per peduncle.
Observation SPH retained only one mature pod per peduncle.
Observation Average seed yields of SPH and AZ‐54 were 45 and 50 % of CA‐5.
Intervention effect Drought stress did not affect production of floral buds in cowpea.
Intervention effect Drought stress significantly increased percent reproductive abscission of CA‐5.
Intervention effect Drought stress decreased pod retention of CA‐5.
Intervention effect Abscission in the bottom two‐third nodes of cowpea rose from 82 % in well‐irrigated to 93 % in non‐irrigated plants.
Intervention effect The increase in abscission in non‐irrigated cowpea corresponded to a nearly 60 % reduction in pod retention.
Intervention effect Pods per peduncle in the bottom two‐third nodes of cowpea fell from 1.9 in well‐irrigated to fewer in non‐irrigated plants.
Intervention effect Drought stress did not affect abscission or pod retention in the top one‐third nodes of cowpea.
Intervention effect Stress decreased peduncles per plant and seeds per pod in cowpea.
Intervention effect Stress decreased dry matter and seed yield per plant in cowpea.
Intervention effect Stress did not affect seed weight or harvest index in cowpea.
Mechanism Fewer pods under stress resulted from fewer peduncles and more reproductive abscission in cowpea.
Association External conditions that raise abscission beyond normal levels are concluded to reduce cowpea seed yield.

Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

Orchardgrass yield did not decrease with delay from early to mid-August.

Taxon: OrchardgrassDactylis glomeratae0
Treatment: planting was delayed from early‐ to mid‐Auguste0
Outcome: yieldse0
Direction: did not decreasee0

Verbatim

e0
“Orchardgrass ( Dactylis glomerata L.) yields did not decrease at either location when planting was delayed from early‐ to mid‐August.”
✓ located verbatim in the source · abstract, characters 1249–1382

Title

Plant Vigor and Yield of Perennial Cool‐Season Forage Crops When Summer Planting Is Delayed

M. H. Hall jpa 1995. doi:10.2134/jpa1995.0233

Other claims from this paper (14)

Recommendationauthor interpretationoriginal resultbasis n/a

Claim · model-written summary

A grower could accept a tomato yield decrease if quality increases sufficiently.

Taxon: tomatoSolanum lycopersicumt0
Outcome: accept a decrease in yielde0
Qualifier: if there were a sufficient increment in quality of the producte0

Verbatim

t0
“GREENHOUSE TOMATO CROP”
✓ located verbatim in the source · title, characters 75–97

e0
“a grower could accept a decrease in yield if there were a sufficient increment in quality of the product”
✓ located verbatim in the source · abstract, characters 2416–2520

Title

COMBINED EFFECT OF CLIMATE AND CONCENTRATION OF THE NUTRIENT SOLUTION ON A GREENHOUSE TOMATO CROP. II: YIELD QUANTITY AND QUALITY

C. Stanghellini; W.Th.M. van Meurs; F. Corver; et al. Acta Horticulturae 1998. doi:10.17660/actahortic.1998.458.27

Other claims from this paper (12)

Intervention effect High EC significantly reduced yield in greenhouse tomato relative to 2 dS/m.
Intervention effect Low transpiration mitigated the effect of high EC on tomato yield relative to high transpiration.
Intervention effect Under high EC, high transpiration reduced marketable tomato yield by 30 percent relative to low transpiration.
Intervention effect Under high EC, high transpiration gave tomato fruits about 25 percent smaller than low transpiration.
Intervention effect Under high EC, high transpiration increased blossom-end rot incidence to 20 percent relative to low transpiration.
Intervention effect Low transpiration with high EC reduced tomato size and yield by 15 percent relative to 2 dS/m.
Observation Under low transpiration, incidence of blossom-end rot was only 2 percent.
Intervention effect Dry matter and sugar content of tomato fruit were higher under high EC than under 2 dS/m.
Observation Total dry matter yield of tomato was the same across treatments except the high EC, high transpiration treatment.
Observation In the high EC, high transpiration treatment, blossom-end rot reduced marketable tomato dry matter by 25 percent.
Observation Tomato fruit elasticity was not affected by any treatment once size differences were accounted for.
Recommendation Appropriate use of indoor climate tools can offset the effect of high salinity of irrigation water on tomato.

Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors favor frequent irrigation to decrease surface relocation of water, despite only slight yield gains.

Taxon: Grain SorghumSorghum bicolort0
Outcome: Frequent irrigation intervalse0
Qualifier: decrease surface relocation of watere0

Verbatim

e0
“Frequent irrigation intervals added only slightly to yield but are desirable in order to decrease surface relocation of water from high intensity LEPA application”
✓ located verbatim in the source · abstract, characters 2051–2213

t0
“Grain Sorghum”
✓ located verbatim in the source · title, characters 19–32

Title

LEPA Irrigation of Grain Sorghum with Varying Water Supplies

J. P. Bordovsky; W. M. Lyle Transactions of the ASAE 1996. doi:10.13031/2013.27706

Other claims from this paper (9)

Intervention effect A 3.5-day irrigation interval gave the highest mean sorghum yield, 7.57 Mg ha1, significantly above longer intervals.
Intervention effect Yield differed significantly among preplant only, 0.4 BI and 0.7 BI quantities.
Intervention effect Yield did not differ among 0.7, 1.0 and 1.3 BI treatments.
Intervention effect The 0.7 BI treatment had almost double the irrigation water use efficiency of 1.3 BI.
Observation Seasonal WUE was 1.69 kg m3 at 0.4 BI.
Intervention effect Preplant-only WUE was 1.52 and equaled the 0.7 BI treatment.
Intervention effect The 3.5-day interval yielded higher WUE than the 14-day interval.
Intervention effect Applicator location had no significant response in yield, IWUE or WUE.
Recommendation The authors advise deficit seasonal LEPA irrigation near 0.7 BI when preplant soil water is adequate.

Observationauthor interpretationoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Grain yield might not decrease significantly when Zaoxian A is used as a parent.

Taxon: indica-japonica hybrid ricee1
Material: Zaoxian Ae0
Outcome: grain yielde0
Direction: might not decreasee0

Verbatim

e0
“Using male sterile line Zaoxian A with a dominant earnness gene as a parent could reduce growth period duration for about 17 days, while grain yield might not decrease significantly.”
✓ located verbatim in the source · abstract, characters 167–349

e1
“indica-japonica hybrid rice”
✓ located verbatim in the source · abstract, characters 30–57

Title

Studies on Earliness of Indica-Japonica Hybrid Rice

Cao Liyon Zhongguo shuidao kexue 1997

Other claims from this paper (1)

Observation Using Zaoxian A as a parent reduced hybrid rice growth period by about 17 days.

“yield decrease”

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