application · Yield · Lactuca sativa (garden lettuce)

Positive and negative results38 papers: 30 positive, 8 negative or no effect

45 claims from these papers; 1 citation between them.

Papers here report positive and negative or no-effect results. No pair of them has been accepted in the claim-by-claim check.

How these papers cite each other

1 citation between these papers: 1 on the same side, 0 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 30

Control of Macrosiphum barri Essig and Its Damage to Lettuce Seed Plants · 1959
- positive
  Repeated parathion sprays and dusts tripled lettuce seed yield.
EFFECT OF NITROGEN FERTILIZATION AND SPRAYING GIBBERELLIC ACID (GA3) ON GROWTH, SEED YIELD AND ITS OIL CONTENT OF SOME LETTUCE CULTIVARS · 2000
- positive
  Balady lettuce fertilized with 60 kg N/fed. and sprayed with 50 ppm GA3 gave the highest seed yield.
Suppression of Western Flower Thrips by Overhead Sprinkler Irrigation in Romaine Lettuce · 2002
- positive
  Insecticide sprays produced higher yielding lettuce than sprinklers.
  compared with sprinklers
- no effect
  Adding sprinkler irrigation to insecticide sprays did not significantly improve yields.
  compared with insecticide spraysNo difference from an alternative treatment
Influences of Sfoliar Selenium Solution Spraying on Selenium content,yield and qualit of Lettuce · 2007
- positive
  Selenium spraying raised lettuce yield.
COMBINED EFFECT OF N-FERTILIZATION LEVELS AND FOLIAR APPLICATION WITH Ca Cl2 AND CITRIC ACID ON YIELD AND NITRATE CONTENT OF LETTUCE PLANTS · 2007
- positive
  80 kg N with CaCl2 significantly affected growth and yield versus control.
  compared with control treatment
Effects of Chelating Plant Nutrients on the yield and quality of flowering Chinese cabbage and lettuce · 2010
- positive
  600-time spraying increased lettuce yield to 2 304 kg per 667 m2, 22.6% above control.
  compared with the control
ROLE OF MICRONUTRIENTS AND ANTIOXIDANTS APPLICATION IN STIMULATING GROWTH AND YIELD OF FRESH EDIBLE VEGETABLES · 2011
- positive
  Micronutrient and antioxidant spraying improved lettuce growth and yield.
Effect of N Fertigation Rates and Humic Acid on The Productivity of Crisphead Lettuce (Lactuca sativa L.) Grown in Sandy Soil · 2016
- positive
  An 800 mg l-1 humic acid drench gave the highest lettuce yield, 65.81 ton ha-1.
Alternative Systems for Cultivating and Side Dressing Specialty Crops for Improved Nitrogen Use Efficiency · 2016
- positive
  Point injection applicator with shaved bed sidewalls showed a trend of roughly 11% higher yield in romaine lettuce.
  compared with conventional cultivation
- no effect
  Point injection applicator combined with a cultivation technique that left bed sidewalls intact did not realize yield improvements in romaine lettuce.
EFFECT OF SPRAY WITH SOME VEGTABLE SPROUTS EXTRACT ON GROWTH, YIELD, AND MICROBAL LOAD OF LETTUCE. · 2016
- positive
  Pepton at 2% produced total lettuce yield of 8775g/m2.
  compared with fenugreek sprout extract
Effect of Vegetal- and Seaweed Extract-Based Biostimulants on Agronomical and Leaf Quality Traits of Plastic Tunnel-Grown Baby Lettuce under Four Regimes of Nitrogen Fertilization · 2019
- positive
  Under non-fertilized regimens, foliar plant biostimulants increased growth and yield of baby lettuce compared with non-treated plants.
  compared with non-treated plants
The Role of Vermicompost and Foliar Spray of SpirulinaPlatensis Extract on Vegetative Growth, Yield and NutritionStatus of Lettuce Plant under sandy soil · 2019
- positive
  Vermicompost and Spirulina extract significantly increased lettuce growth and yield relative to control.
  compared with control treatment
Plug Cell Volume, Main Temperature and the Synthetic Cytokinin 6, Benzyl Aminopurine (BAP) Spray on Lettuce Biomass Accumulation during Nursery at Ambient Temperatures · 2020
- positive
  A BAP spray applied to limited plug trays (128- or 288-cells) increases the nursery yield of lettuce.
Potential of Vermicompost Drippings and Other Vermicomposting Products on the Growth and Yield of Lettuce · 2020
- positive
  Adding foliar vermicompost drippings to vermicompost further improved lettuce yield.
  compared with vermicompost
Effects of Electrical Conductivity, pH, and Foliar Application of Calcium Chloride on Yield and Tipburn of Lactuca sativa Grown Using the Nutrient–Film Technique · 2020
- positive
  Foliar calcium chloride spray had only a minor impact on yield compared with reducing EC.
  compared with reducing EC
Salicylic Acid Enhances Growth, Yield and Quality of Lettuce Plants (Lactuca sativa L.) under Drought Stress Conditions · 2020
- positive
  Salicylic acid spray significantly increased lettuce fresh head weight and head diameter under water deficit.
  compared with treatment that under water deficit
Effects of Humic Acid And Bread Yeast on Growth And Yield of Lettuce (lactuca Sativa L.) under Protected Conditions · 2020
- positive
  Foliar spraying of humic acid and yeast had significant effects on growth and yield of lettuce compared with control.
  compared with control
- positive
  Foliar yeast at 5 g/L gave the highest head weight of lettuce among the treatments.
  compared with control and other treatments
Effects of organic foliar nutrient application on lettuce production in Central Vietnam · 2020
- positive
  Spraying 100 l/ha was optimal and produced the highest lettuce growth and yield.
EFFECT OF FOLIAR SPRAY WITH UREA AND DRY YEAST EXTRACT ON HEAD LETTUCE PRODUCTION · 2021
- positive
  Foliar urea and dry yeast extract significantly increased lettuce root and head length, leaf number, leaf dimensions, and head diameter compared with water spray.
  compared with control treatment
Effect of Mineral Nitrogen Levels and Foliar Spray with Tryptophan Concentrations on Growth, Yield and Quality of Lettuce Plants · 2021
- positive
  The 75% N and 30 ppm tryptophan combination best increased lettuce head weight, total yield and leaf area index.
Effect of biofertilizers, seaweed extract and inorganic fertilizer on growth and yield of lettuce (Lactuca sativa var. longifolia L.) · 2022
- positive
  Soil biofertilizer and foliar algal extract with inorganic fertilizer increased lettuce head weight, yield and total yield compared with the control.
  compared with the control
Influence of foliar application with Moringa oleifera residue fertilizer on growth, and yield quality of leafy vegetables · 2022
- positive
  Lettuce yield was highest at 100 mL per Litre MFB spray.
- no effect
  Lettuce leaf area index and yield were similar across sprays.
  compared with chitosan, and seaweed fertilizersNo difference from an alternative treatment
Effect of foliar application of amino acid biostimulants on growth, macronutrient, total phenol contents and antioxidant activity of soilless grown lettuce cultivars · 2023
- positive
  Perfectose increased iceberg lettuce fresh yield by 25.7%.
- positive
  Perfectose increased romaine lettuce fresh yield by 39%.
cited by 1 paper here
Effect of water stress and foliar application of chitosan and glycine betaine on lettuce · 2023
- positive
  Foliar chitosan or glycine betaine significantly improved lettuce plant performance compared with untreated plants under limited and normal irrigation.
  compared with untreated plants
RESPONSE OF YIELD AND HEAD QUALITY OF LETTUCE TO NITROGEN FERTILIZATION AND SEAWEED EXTRACT FOLIAR APPLICATION UNDER NEW VALLEY CONDITIONS · 2024
- positive
  fertilizing lettuce plants with 90 kg N/fed. and foliar spraying with SWE at 6 ml/l significantly enhanced head diameter, head fresh weight, dry matter percentage in leaves.
- positive
  fertilizing lettuce plants with 90 kg N/fed. and foliar spraying with SWE at 6 ml/l significantly enhanced total yield.
Foliar Spraying Zinc–Carbon Dot Nanofertilizer Promotes Yield and Quality of Lettuce (Lactuca sativa L.) through Leaf–Root Regulation · 2025
- positive
  Nano-ZCD spraying improved lettuce yield by 62.3%.
Alginate/okra gum microcapsules containing fulvic acid for agricultural applications · 2025
- positive
  Foliar encapsulated fulvic acid significantly enhanced lettuce head weight.
  compared with 0%
EFFECT OF MINERAL NITROGEN LEVELS AND FOLIAR SPRAY WITH (Spirulina platensis) EXTRACT ON GROWTH, YIELD AND QUALITY OF LETTUCE PLANTS · 2025
- positive
  Spraying spirulina at 4 ml/l gave the highest head diameter, fresh weight and dry matter percentage of lettuce in both seasons.
A Sustainable Technology Approach to Lettuce (Lactuca sativa L.) Grown Under Greenhouse Condition Through Foliar Application of Various Biostimulants · 2025
- positive
  Rerum foliar fertilization increased lettuce yield 2.19 times versus control.
  compared with control
cites 1 paper here
Intercropping of Lettuce with Mint (Mentha piperita) Fertilized with Rooster Tree (Calotropis procera) Plus Cattle Manure · 2026
- positive
  Lettuce productivity under the rooster tree and cattle manure mixture at 3.0 kg m-2 reached a maximum of 893.83 g m-2 in monoculture.
- positive
  Lettuce productivity under the rooster tree and cattle manure mixture at 3.0 kg m-2 reached a maximum of 344.30 g m-2 when intercropped.

Papers reporting a negative result or no effect 8

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.

application · Yield · Lactuca sativa (garden lettuce)

How these papers cite each other

Papers reporting a positive result 30

Papers reporting a negative result or no effect 8

application on Lactuca sativa (garden lettuce) against other targets

application · yield on other organisms