Search claims · PlantClaims

Associationobservedreview summarynegativemeasured

Claim · model-written summary

Weed competition can decrease alfalfa yield.

Taxon: alfalfaMedicago sativae0
Interactor: Weedse0weed
Outcome: yieldse0
Direction: decreasee0

Verbatim

e0
“Weeds compete with alfalfa for water, nutrients, light, and space. This competition can decrease yields”
✓ located verbatim in the source · abstract, characters 0–103

Title

Weed Management in Alfalfa

William W. Witt UKnowledge (University of Kentucky) 1983

Other claims from this paper (4)

Associationauthor interpretationreview summarynegativebasis n/a

Claim · model-written summary

Salinity above 8 dS /m may decrease alfalfa yield by 50 %.

Taxon: alfalfaMedicago sativae0
Treatment: levelse0
Outcome: alfalfa yielde0
Direction: decreasee0
Value: 50 %e0
Qualifier: 8 dS /me0

Verbatim

e0
“8 dS /m (4091 ppm, 70 mM), levels that may decrease alfalfa yield by 50 %”
✓ located verbatim in the source · abstract, characters 526–599

Title

Breeding Strategies for Alfalfa Grown Under Saline Conditions

D. W. Johnson; S. E. Smith; A. K. Dobrenz UA Campus Repository (The University of Arizona) 1988

Other claims from this paper (3)

Association Alfalfa yields may increase slightly at very low soil salinity.
Association Moderate to high salinity may drastically reduce alfalfa yield.
Association Alfalfa yield begins to decline above a soil salinity threshold of 2 dS /m.

Observationobservedoriginal resultnegativeprojected

Claim · model-written summary

The largest projected alfalfa yield decrease is 9% in Siirt.

Taxon: alfalfaMedicago sativae1
Outcome: yielde0
Direction: decreasee0
Value: 9%e0
Setting: Siirte0

Verbatim

e0
“the maximum yield decrease will be noted in Siirt (9%)”
✓ located verbatim in the source · abstract, characters 1674–1728

e1
“Alfalfa yield for years 2020-2060”
✓ located verbatim in the source · abstract, characters 1019–1052

Title

Estimation of Alfalfa (Medicago sativa l.) yield under RCP4.5 and RCP8.5 climate change projections with ANN in Turkey

MuhammetAli Pekin; NurdanSahin Demirbag; KhalidMahmood Khawar; et al. MAUSAM 2023. doi:10.54302/mausam.v74i3.5598

Other claims from this paper (5)

Method / resource The ANN calculated alfalfa yield with a coefficient of determination of 0.827.
Method / resource The ANN calculated alfalfa yield with a Nash-Sutcliff coefficient of 0.813.
Association Projected alfalfa yield increases where precipitation increases.
Association Projected alfalfa yield decreases where precipitation decreases.
Observation The largest projected alfalfa yield increase is 6% in Artvin.

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Later spring seeding tended to decrease alfalfa dry matter yield.

Taxon: alfalfaMedicago sativae0
Treatment: Seeding alfalfa latere0
Outcome: alfalfa dry matter (DM) yielde0
Direction: decreasee0
Comparator: earliere0

Verbatim

e0
“Seeding alfalfa later, compared with earlier, in the spring tended to increase weed and decrease alfalfa dry matter (DM) yield”
✓ located verbatim in the source · abstract, characters 1037–1163

Title

Evaluation of Weed Control Practices during Spring and Summer Alfalfa Establishment

M. H. Hall; W. S. Curran; E. L. Werner; et al. jpa 1995. doi:10.2134/jpa1995.0360

Other claims from this paper (14)

Intervention effect Later spring alfalfa seeding tended to increase weed dry matter yield.
Intervention effect Spring seeding date did not affect seeding-year total dry matter yield.
Intervention effect Spring seeding date did not affect seeding-year forage quality.
Intervention effect Spring weed-control effects on alfalfa and weed yield were sporadic.
Intervention effect No spring weed control generally gave the greatest net return.
Intervention effect Spring seeding timing and weed-control treatments did not consistently differ in later yield, quality or net return.
Intervention effect Later summer seeding reduced first-harvest alfalfa yield by 704 lb/acre.
Intervention effect Later summer seeding reduced total-season alfalfa yield by 1121 lb/acre.
Intervention effect Summer weed control generally did not improve alfalfa dry matter yield.
Intervention effect Summer weed control generally did not improve total dry matter yield.
Intervention effect Summer weed control generally did not improve forage quality.
Intervention effect Summer weed control generally did not improve net economic return per acre.
Recommendation The authors conclude that studied weed-control practices were not economically beneficial and may reduce returns.
Recommendation The authors advise against nurse crops or herbicides where severe weed infestation is not expected.

Observationauthor interpretationreview summarynegativebasis n/a

Claim · model-written summary

The review states that inappropriate mineral potassium supply can decrease alfalfa biomass and grain yield.

Taxon: alfalfaMedicago sativae0
Outcome: biomass and grain yield productione0
Direction: decreasee0
Qualifier: inappropriate supply of mineral potassium nutritione0

Verbatim

e0
“An inappropriate supply of mineral potassium nutrition in alfalfa production could result in a decrease in biomass and grain yield production”
✓ located verbatim in the source · abstract, characters 152–293

Title

Enhancing Alfalfa (Medicago sativa L.) Productivity: Exploring the Significance of Potassium Nutrition

Ebenezer Ayew Appiah; Andrea Balla-Kovács; Akasairi Ocwa; et al. Agronomy 2024. doi:10.3390/agronomy14081806

Other claims from this paper (1)

Observation The review states that potassium nutrition influences alfalfa photosynthesis, nutrient uptake, and stress tolerance.

Associationobservedoriginal resultnegativemeasured

Claim · model-written summary

A 20% decrease in alfalfa yield was observed when the soil was disturbed below 2.5 cm in an old established stand.

Taxon: alfalfaMedicago sativat0
Treatment: the soil was disturbed below 2.5 cme1
Outcome: yielde1
Direction: decreasee1
Value: 20%e1

Verbatim

t0
“Established Alfalfa Stands”
✓ located verbatim in the source · title, characters 57–83

e1
“A 20% decrease in yield was observed when the soil was disturbed below 2.5 cm”
✓ located verbatim in the source · abstract, characters 1134–1211

Title

Deleterious Effects on Yield of Drilling Fertilizer into Established Alfalfa Stands¹

A. J. Leyshon Agronomy Journal 1982. doi:10.2134/agronj1982.00021962007400040033x

Other claims from this paper (7)

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.

Associationobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

One to three large alfalfa weevil larvae often caused a significant decrease in alfalfa yield.

Taxon: AlfalfaMedicago sativae0
Interactor: alfalfa weevilHypera posticae1pest
Outcome: yielde2
Direction: decreasee2
Qualifier: one to three large larvaee2

Verbatim

e0
“Alfalfa (Medicago sativa L.)”
✓ located verbatim in the source · abstract, characters 0–28

e1
“The alfalfa weevil, Hypera postica (Gylenhall)”
✓ located verbatim in the source · abstract, characters 138–184

e2
“one to three large larvae often cause a significant decrease in yield”
✓ located verbatim in the source · abstract, characters 753–822

Title

Re-evaluating the Economic Injury Level for Alfalfa Weevil (Coleoptera: Curculionidae) Control in Low Desert Irrigated Alfalfa

K Harrington; Y Carrière; A M Mostafa Journal of Economic Entomology 2021. doi:10.1093/jee/toab070

Other claims from this paper (2)

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Nitrogen fertilization tended to decrease alfalfa yields.

Taxon: AlfalfaMedicago sativat0
Treatment: Nitrogen fertilizatione0
Outcome: yieldse0
Direction: decreasee0

Not reportedComparator

Verbatim

e0
“Nitrogen fertilization tended to decrease yields and stands”
✓ located verbatim in the source · abstract, characters 239–298

t0
“Alfalfa”
✓ located verbatim in the source · title, characters 92–99

Title

The Effect of Different Fertility Levels on Yield, Persistence, and Chemical Composition of Alfalfa¹

John L. Gerwig; Gilbert H. Ahlgren Agronomy Journal 1958. doi:10.2134/agronj1958.00021962005000060001x

Other claims from this paper (4)

Intervention effect Potash was the most important factor maintaining high alfalfa yield and stand persistence.
Observation The critical potassium percentage varied between seasons.
Intervention effect Nitrogen fertilization tended to decrease alfalfa stand persistence.
Intervention effect Phosphorus had no significant beneficial effect on alfalfa.

Intervention effectobservedoriginal resultnegativesignificant (as stated)measured

Claim · model-written summary

The maximal significant decrease in substrate biogas yield in bloom stage was 25 to 30% compared with bud stage.

Taxon: lucerneMedicago sativat0
Treatment: bloom stagee3
Outcome: SBYe3
Direction: decreasee3
Value: 25 to 30%e3
Comparator: bud stagee3

Verbatim

t0
“The biogas production from lucerne biomass in relation to term of harvest”
✓ located verbatim in the source · title, characters 0–73

e3
“the maximal significant decrease of SBY in bloom stage ranged from 25 to 30% in comparison with bud stage”
✓ located verbatim in the source · abstract, characters 620–725

Title

The biogas production from lucerne biomass in relation to term of harvest

J. Hakl; P. Fuksa; J. Habart; et al. Plant Soil and Environment 2012. doi:10.17221/98/2012-pse

Other claims from this paper (6)

Intervention effect Delayed cutting significantly increased area biogas yield from lucerne.
Intervention effect In late bloom stage, dry matter yield increased by approximately 50% in the first cut compared with bud stage.
Intervention effect In late bloom stage, dry matter yield increased by 35% in the second cut compared with bud stage.
Association The substrate biogas yield decrease was related to crude protein content in forage and was not consistent across years.
Recommendation Lucerne probably would not play a dominant role in biogas production.
Recommendation Growing lucerne could be a suitable supplement for field biogas production.

“yield decrease”

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