other · Yield · Brassica oleracea (wild cabbage)

Results differ37 papers: 33 positive, 4 negative or no effect · 1 pair of papers confirmed to differ

57 claims from these papers; 7 citations between them.

Papers whose results differ, checked claim by claim 1

1 pair 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.

Effect on yield, total phenolic, total flavonoid and total isothiocyanate content of two broccoli cultivars (Brassica oleraceae var italica) following the application of a commercial brown seaweed extract (Ascophyllum nodosum) (2014)
no changeThe lower seaweed application rate did not increase broccoli yield.
Impact of Seaweed Extract, Chelated Manganese and Some Chemical Substances on Growth Parameters and Yield Components of Cauliflower (Brassica oleracea var, botrytis) (2021)
increaseSeaweed extract at 3 ml/l increased yield and yield components of cauliflower compared with the untreated control.
The records name no dose, test system or situation that separates the two claims.Compare the two papers →

How these papers cite each other

7 citations between these papers: 6 on the same side, 1 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 33

Fertility and Weed Management Effects on Crop Quality and Disease Variables in a Transitional-organic Processing Cabbage and Tomato System · 2005
- positive
  In cabbage, head weight, size and volume of amended plots exceeded the control plots in 2002 and 2003.
  compared with control plots
Results of a trial with hydrogel in cabbage production · 2010
- positive
  Gel treatment differed significantly from other variants in plant weight, head diameter and yield.
  compared with other variants
- positive
  Gel treatment produced the highest cabbage yield, 55.85 t ha-1.
  compared with bands
- negative
  Bands produced the lowest cabbage yield, 39.78 t ha-1.
  compared with gel
Response of Cabbage Plants (Brassica oleraceae var. capitata L. ) to Fertilization with Chicken Manure, Mineral Nitrogen Fertilizer and Humic Acid · 2010
- positive
  Foliar humic acid improved cabbage head yield and head dimensions.
- positive
  Combined chicken manure and humic acid gave favorable cabbage weight and yield.
Study on Yield-increasing Effect of Enteromorpha prolifera Seaweed Fertilizer on Cabbage · 2011
- positive
  Liquid seaweed fertilizer increased cabbage yield by 15.6%.
Farm Compost Application: Effects on Crop Performance · 2012
- positive
  Brussels sprouts dry matter yield increased significantly with annual farm compost in year four.
Integrated effect of bio-organics with chemical fertilizer on growth, yield and quality of cabbage (Brassica oleracea var capitata) · 2014
- positive
  The combined full-dose treatment significantly increased head yield to 54.38 tonnes/ha over the half-dose treatment with Pseudomonas.
  compared with 50% recommended dose of fertilizer with Pseudomonas fluorescens applied
cited by 2 papers here
Enhancing Production Potential of Cabbage and Improves Soil Fertility Status of Indo-Gangetic Plain through Application of Bio-organics and Mineral Fertilizer · 2017
- positive
  Dual inoculation of P. fluorescens and humic acid gave the maximum cabbage productivity.
- positive
  Pseudomonas fluorescens alone or with humic acid gave considerable improvement in cabbage productivity and nutrient status.
cites 1 paper herecited by 1 paper here
EFFECT OF HUMIC ACID AND TRANSPLANTING CONTAINER SIZE ON GROWTH, QUANTITY AND QUALITY YIELD OF PLANT CABBAGE · 2017
- positive
  Humic acid at 5 ml/Litter with the big transplant container produced the highest cabbage yield, 34.23 T/hea.
Response of Broccoli to Irrigation Water Quantities and Foliar Application with Antitranspirants and Humic Acid as Soil Amendement on Yield, Quality and some Antioxidant · 2019
- positive
  Kaolin or humic acid significantly increased most vegetative growth and yield traits relative to control.
  compared with control
cited by 1 paper here
The Effect of Boron, Humic Acid and Interference on Water Productivity and Yield of Cauliflower (Brassica Oleracea) · 2019
- positive
  Boron and humic acid significantly increased cauliflower growth and yield parameters.
The Effect of Boron, Humic Acid and Interference on Water Productivity and Yield of Cauliflower (Brassica Oleracea) · 2019
- positive
  Boron and humic acid application significantly increased cauliflower growth and yield parameters.
Organic Fertilization and Foliar Application with some Microelements and Biostimulants Effects on Productivity and Quality of Cauliflower · 2020
- positive
  Humic acid gave the best yield and components among organic fertilizers.
  compared with other organic fertilization treatments (compost and farmyard manure)
THE EFFICIENCY OF ORGANIC BIOSTIMULANTS FOR KOHLRABI SEEDS AND PLANTS TREATMENT · 2021
- positive
  Biostimulants increased soluble dry matter yield in Delikatesna Bila.
  compared with control treatment
- positive
  Biostimulants increased soluble dry matter yield in Violeta.
  compared with control treatment
Role of Humic Acid and Chemical Fertilizer in NPK Concentration, Growth and Yield of Broccoli Under Salinity Conditions · 2021
- positive
  Humic acid application at 0.25 gm/L gave superior broccoli total yield, at 8.215 tons ha-1.
cited by 2 papers here
Impact of Seaweed Extract, Chelated Manganese and Some Chemical Substances on Growth Parameters and Yield Components of Cauliflower (Brassica oleracea var, botrytis) · 2021
- positive
  Foliar sprays of seaweed extract led to earlier cauliflower production compared with the control.
  compared with the control
- positive
  Seaweed extract at 3 ml/l increased yield and yield components of cauliflower compared with the untreated control.
  compared with control (untreated) treatment
Effect of zeolite on the growth and yield of broccoli in the dry season · 2021
- positive
  Zeolite at 4.68 and 6.24 t ha-1 improved broccoli head diameter and head weight relative to the other treatments.
  compared with the other treatments
- positive
  Zeolite at 6.24 t ha-1 gave a high total broccoli yield of 8.45 t ha-1.
- positive
  Zeolite at 4.68 and 6.24 t ha-1 improved broccoli time to 50% flowering and harvest relative to the other treatments.
  compared with the other treatments
Effect of Fulvic Acid and Seaweed on the Growth and Yield of Broccoli · 2022
- positive
  Spraying fulvic acid at 2.5 g L-1 exceeded total yield in broccoli, at 23.93 t/ha.
  compared with control treatment
- positive
  Spraying seaweed extract at 6 ml L-1 exceeded total yield in broccoli, at 23.55 t/ha.
Combination Influence of Humic Acid and Chelated Iron on yield and quality of Broccoli (Brassica oleracea L) in Erbil, Iraqi Kurdistan Region. · 2023
- positive
  Humic acid at 60Mg ha-1 produced broccoli yield of 21.20 Mg ha-1, above HA0 yield.
  compared with HA0
- positive
  Combined 60 Mg ha-1 humic acid and 12 Mg ha-1 chelated iron produced 22.53 Mg ha-1 yield, above HA0-Fe0.
  compared with HA0-Fe0
- positive
  Combined humic acid and chelated iron increased broccoli yield 1.49 times.
cites 1 paper here
Effect of Plant Biostimulants on Growth, Yield and Some Mineral Composition of Broccoli Plants (Brassica oleracea var. Italica) · 2023
- positive
  Combined biostimulants at 2 ml.L-1 gave the highest main head weight of broccoli (674.46 g).
- positive
  Combined biostimulants at 2 ml.L-1 gave the highest plant yield of broccoli (883.04 g).
- positive
  Combined biostimulants at 2 ml.L-1 gave the highest lateral head weight of broccoli (208.58 g).
The Role of Iron Nanoparticles and Humic Acid in Iron Concentration, Growth and Yield of Broccoli (Brassica Oleracea var Italic) · 2023
- positive
  Combined humic acid and nano iron produced total plant yield of 29.83 mg h -1.
- positive
  Humic acid increased total plant yield to 19.81 Mg h -1.
  compared with control treatment
cites 1 paper here
Effect of foliar application of bio-stimulants on growth, yield and nutritional quality of broccoli · 2023
- positive
  Isabion and seaweed extract increased broccoli yield per plant by 5%.
Effect of adding chemical and organic fertilizers and spraying seaweed extracts on NPKS concentrations and cauliflower yield · 2023
- positive
  Seaweed extract at 4 mmol. L-1 significantly increased head weight to 1.282 kg. Plant-1.
cites 1 paper here
Effect of Algae Seaweed, Urtica Dioica And Zinc Sulfate on Some Yield Quality And Chemical Parameters of Broccoli (brassica Oleracea Var. Italica) Plant · 2023
- positive
  Increasing seaweed concentration increased broccoli head length and diameter.
Effect of Foliar Application Nano NPK Fertilizers and Bio Stimulants on Growth, Yield, and Quality of Two Red Cabbage Cultivars (Brassica oleracea L. var. capitata rubra) · 2023
- positive
  Fulvic acid significantly increased red-cabbage head length, head weight and total yield.
Enhancement of yield and quality of cabbage through application of some biostimulants · 2023
- positive
  Seaweed extract promoted number and weight of non-wrapped leaves and head weight in both seasons.
Mitigation of water stress in broccoli by soil application of humic acid · 2024
- positive
  Soil humic acid mitigated water deficit effects on broccoli growth and yield.
cites 1 paper here
Effect of humic acid, calcium and poultry waste on growth and yield of broccoli · 2024
- positive
  Broccoli yield reached 30.07 Mg ha−1, 143.87% above control.
  compared with control
Effect of Humic Acid, Seaweed Extracts and Organic Fertilizer on the Growth and Yield of Broccoli (Brassica Oleracea) · 2024
- positive
  The combined high-dose treatments significantly increased broccoli plant height (cm), number of leaves.plant-1, and number of head per plant.
- positive
  The combined high-dose treatments significantly increased broccoli head weight (g), head dry matter (%), and yield (kg.m2).
ASSESSMENT OF THE ECONOMIC BENEFIT OF CABBAGE PRODUCTION UNDER DIFFERENT IRRIGATION LEVELS AND SOIL AMENDMENTS IN A SEMI-ARID ENVIRONMENT · 2024
- positive
  Be-Grow Boost (L) hydrogel had the highest benefit-cost ratio of 3.81 among the fully irrigated treatments.
  compared with fully irrigated treatments
- positive
  Zeolite had a benefit-cost ratio of 3.67 among the fully irrigated treatments.
  compared with fully irrigated treatments
- positive
  The fully irrigated Be-Grow Boost (L) hydrogel had a benefit-cost ratio of 3.43 in the second experiment.
Role of seaweed extract and vermicompost application on the morphology, yield, phytochemical, and elemental composition of cauliflower plants · 2024
- positive
  F5 significantly improved cauliflower yield components relative to other treatments.
  compared with the other treatments
Effect of Biostimulants on the Productivity and Nutritional Value of White Cabbage (Brassica oleracea L. var. capitata) · 2025
- positive
  Amino acid and combined treatments gave Bagočiai the highest productivity of 74.9 to 76.2 t ha−1.
- positive
  Biostimulants increased Kamienna Głowa head yield by up to 35% versus control.
  compared with control
- positive
  Biostimulants increased Bagočiai head yield by up to 25% versus control.
  compared with control
- positive
  Amino acid and combined treatments gave Kamienna Głowa the highest productivity of 72.5–78.6 t ha−1.
Nitrogen-enriched Humic Acid together with Zinc Oxide Nanoparticles to Enhance Growth and Quality of Cabbage. · 2025
- positive
  Spraying nitrogen-enriched humic acid at 2 or 3 ml per litre with nZnO at 25 mg per litre raised cabbage head weight by 46.7 to 53.9% above the control.
  compared with control treatment
Development of polyvinyl alcohol, carboxymethyl cellulose, humic acid ternary polymer-based hydrogel fertilizer to enhance cabbage growth, yield, and nutritional quality · 2026
- positive
  Adding humic acid to PCHC-NPK increased cabbage yield 10.25% relative to PCC–NPK.
  compared with PCC–NPK

Papers reporting a negative result or no effect 4

Effects of textural amendment of coarse soils on crop growth and water use · 1980
- no effect
  Fine particle amendments had little effect on field cauliflower yield.
  compared with unamended soil
Enhancement of phenolic and flavonoid compounds in cabbage (Brassica oleraceae) following application of commercial seaweed extracts of the brown seaweed, (Ascophyllum nodosum) · 2013
- no effect
  Seaweed extracts did not significantly increase cabbage yield.
cited by 1 paper here
Effect on yield, total phenolic, total flavonoid and total isothiocyanate content of two broccoli cultivars (Brassica oleraceae var italica) following the application of a commercial brown seaweed extract (Ascophyllum nodosum) · 2014
- no effect
  The lower seaweed application rate did not increase broccoli yield.
cites 1 paper here
The effect of adding compound fertilizer of NPK and Humic acid on the availability of NPK soil and cabbage yield · 2022
- negative
  Humic acid gave lower cabbage yield (57.53 Mg ha-1) than compound fertilizer in the second stage (106 days).
  compared with compound fertilizer
cites 1 paper here

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.

other · Yield · Brassica oleracea (wild cabbage)

Papers whose results differ, checked claim by claim 1

How these papers cite each other

Papers reporting a positive result 33

Papers reporting a negative result or no effect 4

other on Brassica oleracea (wild cabbage) against other targets

other · yield on other organisms