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“yield decrease”

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plus 6 earlier · 1930s

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Observationobservedoriginal resultno effectmeasured

Claim · model-written summary

Corn plant densities showed no consistent differences in grain yield or mycotoxins.

Taxon: cornZea mays subsp. mayse6
Treatment: plants/acree2
Outcome: grain yields or mycotoxinse2

Verbatim

e6
“Potassium maintains water status in corn ( Zea mays L)”
✓ located verbatim in the source · abstract, characters 0–54

e2
“Consistent differences in grain yields or mycotoxins were not found among hybrids or plants/acre”
✓ located verbatim in the source · abstract, characters 1075–1171

Title

Additional Potassium Did Not Decrease Aflatoxin or Fumonisin nor Increase Corn Yields

H. Arnold Bruns; Hamed K. Abbas Crop Management 2010. doi:10.1094/cm-2010-0216-01-rs

Other claims from this paper (8)

Intervention effect Increased potassium fertility did not reduce aflatoxin contamination of corn grain.
Intervention effect Increased potassium fertility did not reduce fumonisin contamination of corn grain.
Intervention effect Increased potassium fertility did not increase corn grain yield.
Observation Corn hybrids showed no consistent differences in grain yield or mycotoxins.
Mechanism Differences among years in mycotoxins and yield likely resulted from differences in rainfall.
Recommendation Current potassium fertilizer recommendations appear adequate for both low mycotoxin levels and high grain yields.
Observation Site 1 soil needed 60 lbs K 2 O/acre to yield 200 bu/acre of corn.
Observation Site 2 soil needed 90 lbs/acre of potassium for corn.

Method / resourceobservedoriginal resultno effectprojected

Claim · model-written summary

EPIC projected no change in corn yield under the fine scale scenario.

Taxon: cornZea mays subsp. mayst0
Direction: no changee0
Comparator: fine scale 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 a corn yield decrease under the coarse 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

Plant and ear height remained stable when fertilizer rate fell from F100 to F50.

Taxon: hybrid maizeZea mayse0
Treatment: decrease in fertilizer rate from F100 to F50e3
Outcome: Plant and ear heighte3
Direction: no_changeinferrede3
Comparator: F100e3

Verbatim

e0
“hybrid maize in autumn and spring growing season”
✓ located verbatim in the source · abstract, characters 434–482

e3
“Plant and ear height remained stable with decrease in fertilizer rate from F100 to F50”
✓ located verbatim in the source · abstract, characters 711–797

Title

Improving yield and quality of maize by different drip-fertigation rates of N, P and K fertilizers

Asrar Mahboob; Muhammad Shoaib; Muhammad Manzoor; et al. Soil & Environment 2020. doi:10.25252/se/20/132080

Other claims from this paper (11)

Intervention effect In autumn, final harvested plants per hectare decreased by 4.9% as fertilizer rates fell from F100 to F25.
Intervention effect In spring, final harvested plants per hectare decreased by 5.85% as fertilizer rates fell from F100 to F25.
Intervention effect Ears per hectare decreased by 5.9% and 6.05% as fertilizer rates fell from F100 to F25.
Intervention effect With F25, maize reached maturity 2 days earlier than with F100 in both autumn and spring seasons.
Association Ear length and number of grains per row showed an increasing trend with increasing fertigation rate.
Observation Number of rows per ear showed a significant response in only one of four growing instances.
Intervention effect Highest fresh ear weight and grain yield were produced or sustained at F75 in both seasons, above the F100 rate.
Recommendation The authors recommend applying 75% of the recommended N, P and K through drip fertigation for maize in Punjab.
Intervention effect Protein and oil percentages were higher at F75 than at other rates in both seasons.
Association Partial factor productivity showed a negative relation with increasing fertigation rate.
Intervention effect Higher PFP values at lower fertilizer rates were economically ineffective.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Intercropping did not significantly influence plantain bunch yield.

Taxon: plantainMusa ABB Groupe2
Treatment: Intercroppinge2
Outcome: bunch yielde2
Direction: did not significantly influencee2
Setting: South Western Nigeriat0

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

t0
“Productivity of Plantain (MusaAAB)-Melon Mixtures in South Western Nigeria”
✓ located verbatim in the source · title, characters 0–74

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 caused a 2–7% yield decrease in egusi melon.
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 effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Low tunnels did not increase pepper yield.

Taxon: Bell Peppert0
Treatment: low tunnels for two weeks after transplantinge1
Outcome: yielde0
Direction: did not increasee0
Comparator: plants not grown under low tunnelse0

Verbatim

e0
“they did not increase yield or decrease sunscald compared to plants not grown under low tunnels”
✓ located verbatim in the source · abstract, characters 1209–1304

e1
“plants grown under low tunnels for two weeks after transplanting”
✓ located verbatim in the source · abstract, characters 1123–1187

t0
“Bell Pepper”
✓ located verbatim in the source · title, characters 63–74

Title

Biological and Mechanical Approaches to Sunscald Management in Bell Pepper Production

Day, Samuel D. Digital Commons - USU (Utah State University) 2021. doi:10.26076/9131-577c

Other claims from this paper (13)

Intervention effect Two weeks of low tunnels produced larger pepper canopies.
Intervention effect Low tunnels did not decrease pepper sunscald.
Intervention effect Vertical shade with low tunnels increased pepper yield most effectively.
Intervention effect Vertical shade with low tunnels decreased sunscald most effectively.
Observation Vertical shade protected exposed fruit at lower solar elevations.
Observation Increased canopy shade protected fruit at high solar elevations.
Intervention effect Horizontal shade completely eliminated sunscald.
Intervention effect Horizontal shade produced the largest yields of high quality fruit.
Observation Increased yields and larger fruit value offset supplemental shade costs.
Association Sunlight above 550 W·m-2 raised pepper fruit surface temperature to damaging levels.
Association Wind decreased pepper fruit surface temperature.
Association Moderate wind of 3.0 m·s-1 did not lower fruit temperature below damaging levels.
Recommendation Growers should use supplemental shade above 550 W·m-2 solar radiation.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Tolerating weeds in turnips did not benefit predators.

Taxon: turnipsBrassica rapa subsp. rapae0
Treatment: tolerating weedse0
Interactor: predatorse0other
Outcome: predatorse0
Direction: did not benefite0

Not reportedComparator

Verbatim

e0
“tolerating weeds in turnips had strong yield costs, and did not benefit predators or decrease pest pressure”
✓ located verbatim in the source · abstract, characters 899–1006

Title

Weeds Impose Unique Outcomes for Pests, Natural Enemies, and Yield in Two Vegetable Crops

Melina K Madden; Ivy V Widick; Carmen K Blubaugh Environmental Entomology 2020. doi:10.1093/ee/nvaa168

Other claims from this paper (8)

Intervention effect Weeds adjacent to eggplant rows increased predator abundance.
Intervention effect Weeds adjacent to eggplant rows reduced pests.
Intervention effect Relaxed weed management did not reduce eggplant yield.
Intervention effect Tolerating weeds reduced turnip yield.
Intervention effect Tolerating weeds in turnips did not decrease pest pressure.
Association Pest abundance declined as weed diversity rose in both crops.
Intervention effect Weed treatments did not change consumption of weed seeds by soil-surface insects.
Intervention effect Weed treatments did not change consumption of sentinel prey by soil-surface insects.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Soil pH between 5.3 and 6.6 did not change nutrient uptake.

Taxon: cabbageBrassica oleracea var. capitatat0
Treatment: soil pH from 5.3 to 6.6e0
Outcome: nutrient uptakee0
Direction: did not increase or decreasee0

Not reportedComparator

Verbatim

e0
“a range of soil pH from 5.3 to 6.6 did not increase or decrease leaf tipburn incidence, nutrient uptake or total yield”
✓ located verbatim in the source · abstract, characters 1050–1168

t0
“cabbage”
✓ located verbatim in the source · title, characters 79–86

Title

Influence of soil calcium, potassium, and pH on development of leaf tipburn of cabbage in eastern North Carolina

Marc A. Cubeta; Bryan R. Cody; Roger E. Sugg; et al. Communications in Soil Science and Plant Analysis 2000. doi:10.1080/00103620009370435

Other claims from this paper (9)

Intervention effect Higher potassium rates increased cabbage leaf potassium concentration.
Intervention effect Higher potassium rates increased soil potassium content.
Intervention effect Higher potassium rates increased cabbage tipburn incidence.
Intervention effect Total cabbage yield increased with potassium rates, significantly only at 365 kg K ha‐1 versus control in 1996.
Intervention effect Adding calcium and potassium together did not significantly increase tipburn incidence.
Intervention effect Soil pH between 5.3 and 6.6 did not change tipburn incidence.
Intervention effect Soil pH between 5.3 and 6.6 did not change total yield.
Mechanism The authors suggest excessive potassium fertilization can induce cabbage tipburn.
Recommendation The authors suggest calcium with potassium may reduce potassium-related tipburn risk.

Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

The 75% RFD dose did not significantly compromise yield compared with the 125% RFD treatment.

Taxon: riceOryza sativat0
Treatment: 75% RFD dosee1
Outcome: yielde1
Direction: without compromisinge1
Comparator: 125% RFD treatmente1

Verbatim

t0
“Nitrogen rates shaping rice yield”
✓ located verbatim in the source · title, characters 0–33

e1
“Despite slightly lower yield than the 125% RFD treatment, the 75% RFD dose showed a significant decrease in nitrate leaching in groundwater without compromising the yield significantly”
✓ located verbatim in the source · abstract, characters 1873–2057

Title

Nitrogen rates shaping rice yield and groundwater nitrate in the Jamuna River basin of north central Bangladesh

Md. Israfil Haq; Nishat Salsabil Khan; Mohammad Golam Kibria; et al. JSFA reports 2026. doi:10.1002/jsf2.70036

Other claims from this paper (15)

Intervention effect Nitrogen fertilizer application significantly improved plant height, panicle length and tillers compared with control in rice.
Intervention effect Nitrogen fertilizer application significantly improved the number of filled grains compared with control in rice.
Intervention effect Grain yield increased significantly over control, highest at 125% RFD with 4.76 t/ha.
Intervention effect Straw yield increased significantly over control, highest at 125% RFD with 5.48 t/ha.
Observation Grain yields at 75% and 100% RFD were statistically similar in rice.
Association Groundwater nitrate concentration responded significantly to fertilizer rates and sampling time.
Observation Groundwater nitrate was lowest on day 1 and peaked on day 5 after each split application.
Observation Highest groundwater nitrate concentration reached 6.8 ppm following the first split.
Observation Highest groundwater nitrate concentration reached 9.4 ppm following the second split.
Observation Highest groundwater nitrate concentration reached 12.2 ppm following the third split.
Intervention effect The highest nitrate concentrations in groundwater were always observed under 125% RFD.
Intervention effect Elevated urea application rate led to greater nitrate leaching.
Intervention effect The 75% RFD dose significantly decreased nitrate leaching in groundwater compared with the 125% RFD treatment.
Recommendation A 75% RFD rate is recommended as offering an optimal balance between yield performance and groundwater contamination risk.
Association Excessive nitrogen use is suggested to accelerate groundwater nitrate contamination in this floodplain ecosystem.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Optimum gibberellin concentrations caused little or no reduction in fruit yield.

Taxon: Zinfandel, Tinta Madeira, and Carignane vinese0
Treatment: Optimum concentrations of gibberelline2
Outcome: yield of fruite2
Direction: little or no reductione2

Not reportedComparator

Verbatim

e0
“Zinfandel, Tinta Madeira, and Carignane vines were sprayed with gibberellin at prebloom or bloom stage”
✓ located verbatim in the source · abstract, characters 0–102

e2
“Optimum concentrations of gibberellin caused little or no reduction in yield of fruit”
✓ located verbatim in the source · abstract, characters 180–265

Title

Studies with Gibberellin on Wine Grapes to Decrease Bunch Rot

Robert J. Weaver; A. N. Kasimatis; Stanley B. Mccune American Journal of Enology and Viticulture 1962. doi:10.5344/ajev.1962.13.2.78

Other claims from this paper (3)

Intervention effect Gibberellin sprays loosened grape clusters.
Intervention effect Gibberellin sprays sharply reduced the prevalence of bunch rot.
Intervention effect Gibberellin spraying in two successive years produced no adverse effects.

Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Direct sowing maintained yield at the level of classic tillage and sowing.

Taxon: WINTER WHEATTriticum aestivumt0
Treatment: Direct sowinge0
Outcome: yielde0
Direction: same levele0
Comparator: classic soil tillage and sowing technologiese0

Verbatim

e0
“Direct sowing and conservation soil tillage gave a decrease o f grain cost and provide the same level o f yield achieved with classic soil tillage and sowing technologies”
✓ located verbatim in the source · abstract, characters 470–640

t0
“WINTER WHEAT”
✓ located verbatim in the source · title, characters 51–63

Title

EFFECTS OF SOIL TILLAGE AND SOWING TECHNOLOGIES ON WINTER WHEAT

Dainis Lapiņš; Andris Bērziņš; Zinta Gaile; et al. Environment Technology Resources Proceedings of the International Scientific and Practical Conference 2001. doi:10.17770/etr2001vol1.1937

Other claims from this paper (5)

Intervention effect Soil pacomat increased winter wheat yield.
Intervention effect Local mineral fertilizing increased winter wheat yield.
Intervention effect Direct sowing decreased grain cost.
Intervention effect Conservation soil tillage decreased grain cost.
Intervention effect Conservation soil tillage maintained yield at the level of classic tillage and sowing.

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“yield decrease”

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