glyphosate · Growth · Medicago sativa (alfalfa)
27 claims from these papers; 12 citations between them.
Papers whose results differ, checked claim by claim 5
5 pairs of papers on this question report results that differ: an effect in one paper, the opposite effect or no effect in the other. Two model reviewers reading both claims accepted each pair.
- Effects of glyphosate on the germination and establishment of surface-sown pasture species (1974)
no changeResidual glyphosate had no important effect on seed germination.
Herbicidal Activity of Glyphosate in Soil (1982)decreaseGermination and growth of alfalfa were reduced when seeds were sown on a glyphosate-sprayed soil surface up to 24 h after application.
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - Use of Glyphosate in Sod Seeding Alfalfa(Medicago sativa)Establishment (1978)
no changeGlyphosate-treated bluegrass clippings did not significantly reduce alfalfa dry weight.
The Impact of Glyphosate-Contaminated Soil on the Growth of Alfalfa (2025)decreaseHigh glyphosate residue reduced fresh weight by 5.5 g (46%).
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - Preharvest glyphosate in alfalfa for seed production: Control of Canada thistle (2003)
no changePreharvest glyphosate did not affect germination or later emergence of harvested alfalfa seed.
Herbicidal Activity of Glyphosate in Soil (1982)decreaseGermination and growth of alfalfa were reduced when seeds were sown on a glyphosate-sprayed soil surface up to 24 h after application.
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - Preharvest glyphosate in alfalfa for seed production: Effect on alfalfa seed yield and quality (2003)
no changeGlyphosate rate and timing did not affect germination or seedling emergence.
Herbicidal Activity of Glyphosate in Soil (1982)decreaseGermination and growth of alfalfa were reduced when seeds were sown on a glyphosate-sprayed soil surface up to 24 h after application.
The records name no dose, test system or situation that separates the two claims.Compare the two papers → - Herbicidal Activity of Glyphosate in Soil (1982)
decreaseGermination and growth of alfalfa were reduced when seeds were sown on a glyphosate-sprayed soil surface up to 24 h after application.
Use of Glyphosate in Sod Seeding Alfalfa(Medicago sativa)Establishment (1978)no changeGlyphosate did not significantly reduce germination of Saranac or Vernal alfalfa in petri dishes.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
How these papers cite each other
12 citations between these papers: 6 on the same side, 6 across the two sides.
- Positive result
- Negative result or no effect
- Citation, pointing to the cited paper
- Citation across the two sides
- Larger circle: more citations overall
Years run left to right. Citations come from the papers’ OpenAlex reference lists. Hover a paper to bring forward its citations; click it to open the paper.
Papers reporting a positive result 6
Glyphosate Timing Effects on Establishment of Sod‐Seeded Legumes and Grasses1 · 1981
- positive
- positive
Continuous Alfalfa: Invertebrate Pests During Establishment1 · 1984
- positive
Dodder (Cuscutaspp.) Control in Established Alfalfa (Medicago sativa) with Glyphosate and SC-0224 · 1989
- positive
Dodder (Cuscutaspp.) Control in Newly Seeded Alfalfa (Medicago sativa) with Glyphosate · 1990
- positive
Establishment Systems for Glyphosate-Resistant Alfalfa · 2008
- positive
Competition Indicator in Alfalfa Populations Following Recurrent Selection to Glyphosate Tolerance · 2020
- positive
- negative
- negative
- negative
- negative
Papers reporting a negative result or no effect 8
Effects of glyphosate on the germination and establishment of surface-sown pasture species · 1974
- negative
- no effect
Use of Glyphosate in Sod Seeding Alfalfa(Medicago sativa)Establishment · 1978
- no effect
- no effect
- no effect
- negative
Herbicidal Activity of Glyphosate in Soil · 1982
- negative
- negative
- negative
- negative
Preharvest glyphosate in alfalfa for seed production: Control of Canada thistle · 2003
- no effect
Preharvest glyphosate in alfalfa for seed production: Effect on alfalfa seed yield and quality · 2003
- no effect
- negative
The Impact of Glyphosate-Contaminated Soil on the Growth of Alfalfa · 2025
- negative
- negative
- negative
A paper is on the positive side when any of its claims here is positive. Claims are grouped by organism, treatment and what was measured or targeted. Claims that compare genotypes are left out; a claim about lacking a nutrient counts the other way round in that nutrient’s question. “Results differ” marks a question where two model reviewers, reading both claims, accepted at least one pair of papers whose results differ.