Intervention effectmodel-written summary

Pre-emergence herbicides decreased pea seed yield.

A claim from Effects of herbicides on nodulation, symbiotic nitrogen fixation, growth and yield of pea (Pisum sativum) · 1999

Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Pre-emergence herbicides decreased pea seed yield.

Treatment
pre-emergence herbicidese0
Outcome
seed yielde0
Direction
decreasede0

Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Lathyrus oleraceus
Lathyrus oleraceus · TaxonRenee Comet (photographer) AV Number: AV-9400-4164 · Public domain · Wikimedia Commons ↗

Verbatim

e0

“All pre-emergence herbicides decreased nodulation, total nitrogenase activity, net photosynthesis, leaf area, root and shoot dry weight, nitrogen content and seed yield of peas.”

✓ located verbatim in the source · abstract, characters 331–508

Title

Effects of herbicides on nodulation, symbiotic nitrogen fixation, growth and yield of pea (Pisum sativum)

G. SINGH; D. WRIGHT The Journal of Agricultural Science 1999. doi:10.1017/s0021859699006735

Other claims from this paper (7)

Record rev-d85f9967f25a16d393e5da6be642d649b0fca094e1716d87885d60456c876dc1 · schema claims-v0.9 · position 3 in the model’s answer

herbicide · yield · Lathyrus oleraceus (pea)Results differ

62 papers: 45 positive, 17 negative or no effect

16 papers in the same direction as this claim · 45 in the opposite direction

  1. negative
    Herbicides decreased pea seed yield.

    Effect of weed management on weeds, and on the nodulation, nitrogenase activity, growth and yield of pea (Pisum sativum) · 2006

    Same directionCites this paper

  2. positive
    Combined imazethapyr seed treatment and late imazapyr increased pea biomass and seed yield relative to infested untreated plants.

    Broomrape (Orobanche crenata) Control with Imazethapyr Applied to Pea (Pisum sativum) Seed · 1996 · compared with broomrape-infested nontreated control

    Opposite direction

  3. positive
    Under conservation tillage, maximum weed management raised pea yield by up to 335 kg ha −1 compared with minimum management.

    Integration of Weed Management and Tillage Practices in Spring Dry Pea Production · 1994 · compared with minimum weed management level

    Opposite direction

  4. positive
    Early-seeded field peas followed by an in-crop herbicide application gave the highest field pea yields.

    Pre-emergence mechanical weed control in field pea (Pisum sativum L.) · 2010

    Opposite direction

  5. positive
    Early herbicide application produced no recorded yield penalty.

    An assessment of the concept of early time of weed removal in field pea using natural weed populations · 2003

    Opposite direction

  6. positive
    Weed-control treatments significantly increased green pod yield versus unweeded control.

    Evaluation of mulching, stale seedbed, hand weeding and hoeing for weed control in organic garden pea (Pisum sativumsub sp. Hortens L.) · 2009 · compared with unweeded control

    Opposite direction

  7. positive
    Weed-control treatments significantly increased green pod yield over the weedy check.

    Integrated weed management in gardenpea under mid-hills of north-west Himalayas. · 2000 · compared with weedy check

    Opposite direction

  8. positive
    The greatest pea yield increases came from pre-emergence tine weeding.

    Timing and frequency of tine weeding in organic wheat and pea crops · 2003

    Opposite direction

53 papers more in this group

See all 62 papers →

Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.