fertilization · Quality: phytochemicals · Brassica oleracea (wild cabbage)

Results differ66 papers: 57 positive, 9 negative or no effect · 2 pairs of papers confirmed to differ

82 claims from these papers; 14 citations between them.

Papers whose results differ, checked claim by claim 2

2 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.

The Influence of Digestate and Mineral Fertilisers on Yields and Content of Nitrates and Ascorbic Acid in Kohlrabi Bulbs (2014)
increaseFertilization significantly increased bulb ascorbic acid versus unfertilized treatment at 398 mg/kg.
Digestate is equal or a better alternative to mineral fertilization of kohlrabi (2013)
decreaseFertilised treatments had significantly lower ascorbic acid content (282-301 mg/kg) than the unfertilised control (334 mg/kg).
The records name no dose, test system or situation that separates the two claims.Compare the two papers →
Digestate is equal or a better alternative to mineral fertilization of kohlrabi (2013)
decreaseFertilised treatments had significantly lower ascorbic acid content (282-301 mg/kg) than the unfertilised control (334 mg/kg).
Comparison of the effectiveness of digestate and mineral fertilisers on yields and quality of kohlrabi (Brassica oleracea, L.) (2014)
increaseFertilised treatments had significantly higher ascorbic acid content than the unfertilised 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

14 citations between these papers: 12 on the same side, 2 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 57

Cultivation Conditions and Selenium Fertilization Alter the Phenolic Profile, Glucosinolate, and Sulforaphane Content of Broccoli · 2005
- positive
  Selenium fertilization initially increased glucosinolate production.
- negative
  Above the threshold selenium fertilization decreased glucosinolate production.
cited by 1 paper here
Application effect of hi-effective green amino acid chelating leaf fertilizer in cabbage · 2006
- positive
  The chelating leaf fertilizer increased Vitamin C concentration in cabbage
EFFECT OF SHEEP MANURE, PHOSPHORUS LEVELS AND CHEMICAL FERTILIZERS AS WELL AS BIOFERTILIZERS ON GROWTH, YIELD, NITRATE ACCUMULATION AND CHEMICAL COMPONENTS OF BROCCOLI (Brassica oleracea var italica) PLANTS · 2009
- positive
  Sheep manure plus 10 kg P2O5 produced higher head ascorbic acid than chemical fertilizer.
  compared with chemical fertilizers
- positive
  Sheep manure plus 10 kg P2O5 produced higher head ascorbic acid than manure plus 20 kg P2O5.
  compared with sheep manure plus 20 kg P2O5
Functional studies of lignin biosynthesis genes and putative flowering gene in Miscanthus x giganteus and studies on indolyl glucosinolate biosynthesis and translocation in Brassica oleracea · 2010
- positive
  Low-level selenium fertilization with MeJA increased total glucosinolate concentration by 50% in broccoli.
- positive
  Low-level selenium fertilization with MeJA increased indolyl glucosinolate concentration by 90% in broccoli.
cites 1 paper here
Effect of slow-release-compound fertilizers on yield and quality in cabbage. · 2010
- positive
  SRF improved the vitamin C, amino acid and reductive sugar contents of cabbage.
Effect of Nitrogen,Phosphorus and Potassium on Yield and Quality of Broccoli · 2011
- positive
  Nitrogen fertilizer increased the vitamin C content of broccoli.
Enhancement of phenolics, flavonoids and glucosinolates of Broccoli (Brassica olaracea, var. Italica) as antioxidants in response to organic and bio-organic fertilizers · 2012
- positive
  Under organic fertilizer treatment, total phenolic, flavonoid and glucosinolate contents were almost higher in Calabrese.
Enhancement of head yield and quality of cabbage (Brassica oleracea) by combining different sources of nutrients · 2012
- positive
  The combined treatment gave maximum vitamin A of 126.76 µg/100g.
- positive
  The combined treatment gave maximum vitamin C of 44.62 mg/100g.
cites 1 paper herecited by 3 papers here
Effect of Different Tillage Ways and Fertilization Patterns on Cauliflower Growth and Nutrient Uptake · 2012
- positive
  Fertilization improved vitamin C content of cauliflower compared with no fertilizer.
  compared with no fertilizer
Effect of organic manures and biofertilizers on yield, dry matter partitioning and quality traits of cabbage (Brassica oleracea var. capitata) · 2012
- positive
  FYM or pressmud with PSM or VAM increased cabbage head ascorbic acid content.
cited by 2 papers here
FERTILISATION IMPACT ON THE CONTENT OF SELECTED BIOACTIVE COMPOUNDS IN CAULIFLOWER · 2013
- positive
  Increased nitrogen and sulphur fertilization significantly increased cauliflower vitamin C content.
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 gave significantly higher head ascorbic acid content of 34.51 mg/100 g.
cites 2 papers here
The Influence of Digestate and Mineral Fertilisers on Yields and Content of Nitrates and Ascorbic Acid in Kohlrabi Bulbs · 2014
- positive
  Fertilization significantly increased bulb ascorbic acid versus unfertilized treatment at 398 mg/kg.
  compared with unfertilised treatment
cites 1 paper here
Comparison of the effectiveness of digestate and mineral fertilisers on yields and quality of kohlrabi (Brassica oleracea, L.) · 2014
- positive
  Fertilised treatments had significantly higher ascorbic acid content than the unfertilised control.
  compared with unfertilised treatment
cited by 2 papers here
EFFECT OF INTEGRATED NUTRIENT MANAGEMENT ON YIELD AND QUALITY OF CAULIFLOWER (BRASSICA OLERACEA VAR. BOTRYTIS L.) · 2014
- positive
  The treatment yielded maximum ascorbic acid of 63.19.
Effect of different organic nutrient levels on growth, yield and quality in cauliflower · 2015
- positive
  Integrated nutrient management improved vitamin C in cauliflower compared with chemical fertilizers only.
  compared with chemical fertilizers only
- positive
  Integrated nutrient management improved total antioxidant capacity, radical scavenging ability and total flavonoids in cauliflower compared with chemical fertilizers only.
  compared with chemical fertilizers only
Impact of integrated nutrient management on yield, quality traits and economics of cabbage (Brassica oleracea L. var. capitata) · 2015
- positive
  FYM or pressmud with PSM or VAM significantly increased head ascorbic acid to 14.25–15.48±0.33 mg/100 g.
- positive
  FYM with PSM gave significantly higher total phenols at 45 DAT and edible maturity.
Growth, yield and quality response of organic broccoli to intercrops and crop geometry · 2016
- positive
  application of vermicompost coupled with single row spacing and sole crop of broccoli gave the maximum vitamin A (14.43 mg/100 g) among 30 combinations.
  compared with 30 treatment combinations
- positive
  application of vermicompost coupled with single row spacing and sole crop of broccoli gave the maximum vitamin C (96.80 mg/100 g) among 30 combinations.
  compared with 30 treatment combinations
Yield and Quality of Cabbage (Brassica oleracea L. var. Capitata) Under Organic Growing Media Using Vermicompost and Earthworm Pontoscolex corethrurus Inoculation · 2016
- positive
  Vermicompost increased cabbage vitamin C content by an average 57%.
  compared with inorganic treatment
Mulching and different levels of nitrogen and phosphorus improve yield and quality attributes of broccoli (Brassica oleracea var. italica) and physicochemical property of soil · 2017
- positive
  Increasing N and P doses under mulch increased growth, yield and quality traits other than vitamin C and beta-carotene.
Effect of Bio-Organics and Mineral Nutrients on Yield, Quality and Economics of Sprouting Broccoli (Brassica oleracea var. italica) · 2017
- positive
  The combined treatment was best for broccoli head crude protein and vitamin-C contents.
cited by 2 papers here
The Use Of Different Systems Fertilizer Of Late Cabbage In Irrigated Vegetable And Fodder Crop Rotation Steppe Of Ukraine. · 2017
- positive
  60 t/ha manure plus N 120 P 120 K 90 significantly increased ascorbic acid to 27.99 mg/100g from 24.81 mg/100g without fertilizers.
  compared with without fertilizers
Effects of integrated nutrient management on growth, yield, quality and economics of sprouting broccoli (Brassica oleracea var. italica) cv. Shayali · 2018
- positive
  T7 had highest vitamin C of 80.24mg/g.
A COMPARATIVE STUDY ON THE EFFECTS OF DIFFERENT CONVENTIONAL, ORGANIC AND BIO-FERTILIZERS ON BROCCOLI YIELD AND QUALITY · 2018
- positive
  Some organic fertilizers and biofertilizers significantly increased ascorbic acid content of broccoli heads.
cites 1 paper herecited by 1 paper here
Effect of integrated nutrient management on growth, yield and quality of broccoli (Brassica oleracea L. var. italica) · 2018
- positive
  Maximum ascorbic acid of broccoli (84.17 mg 100 g-1) was recorded in T9 (75% RDF + Biofertilizers + Vermicompost).
Effect of Seaweed Liquid Fertilizer on Antioxidant and Enzyme Activity of Different Vegetables Seeds · 2019
- positive
  Seaweed liquid fertilizer enhanced antioxidant activity of Brassica oleracea var. Capitata
Influence of Organic Manure and Inorganic Fertilizer on the Growth, Yield and Phytochemical Constituents of Cabbage (Brassica oleracea) · 2019
- positive
  Organic manure produced more phenolics, alkaloids and flavonoids in cabbage than inorganic fertilizer.
  compared with inorganic fertilizer
Effect of Liquid Biofertilizers and Inorganic Fertilizers on Yield and Quality Attributes of Broccoli (Brassica oleracea L. var. italica) · 2019
- positive
  Broccoli ascorbic acid was highest (125.04 mg/100g) with 125 % RDF plus Azotophos.
cites 1 paper here
Partial substitution of mineral fertilizer with biofertilizer enhances cauliflower nutritional quality, yield, and soil characteristics · 2020
- positive
  The 80% mineral fertilizer with biofertilizer treatment increased cauliflower vitamin C content by 39.5% in 2015 and 43.6% in 2016 relative to 100% mineral fertilization.
  compared with 100% mineral fertilization treatment
cites 1 paper here
Impact of Various Organic Manures on Growth, Growth Attributes and Quality of Cabbage (Brassica oleracea var. capitata L.) · 2020
- positive
  Recommended fertilizer gave maximum ascorbic acid content of 44.05 mg/100g.
Bio-effectiveness of Sabuj Gold as Organic Manure on Cabbage, Cauliflower and French Bean · 2020
- positive
  Organic regime produced cabbage ascorbic acid 65.24 mg/100g.
The Effects of Different Fertilizer Treatments on Kohlrabi (Brassica oleracea L. var. gongylodes) Cultivation · 2021
- positive
  Compared with the control, treatments increased vitamin C by 3.37 (VC) to 12.45% (SW).
  compared with control
Effect of Different Doses and Sources of Nitrogen on Postharvest Quality of Cauliflower · 2021
- positive
  A 50/50 urea and poultry manure blend produced vitamin C content of 52.0 mg/100 g.
Phosphorus and Biofertilizer Application Effects on Growth Parameters, Yield and Chemical Constituents of Broccoli · 2021
- positive
  MAP plus mycorrhiza gave the highest leaf nitrogen and head ascorbic acid.
cited by 1 paper here
Efficiency of nutrient solutions with different concentration in the cultivation of white cabbage seedlings · 2021
- positive
  Solution No. 2 raised Mirror F 1 ascorbic acid content to 78.79 mg%.
Impact of Molybdenum Application on Yield, Quality and Profitability of Cauliflower ( var. L.) in Brassica oleracea botrytis an Acid Alfisol Soil · 2022
- positive
  The same treatment enhanced ascorbic acid content, to 77.8 mg per 100 g.
EFFECT OF NPK AND SULPHUR ON GROWTH, YIELD AND CHLOROPHYLL CONTENTS OF CAULIFLOWER (BRASSICA OLERACEA L). · 2022
- positive
  vitamin C was maximal at 56.81 mg100 g-1 with NPK 16:19:19 and sulphur 40 g per plant.
cited by 1 paper here
Effect of Organic Manures and Inorganic Fertilizers on Growth, Yield and Quality of Broccoli (Brassica oleraceae var. italica L.) cv. Green Magic · 2022
- positive
  Treatment T6 performed best for Vitamin C with 103.97.
  compared with other treatments
Integrated nutrient management studies in cabbage (Brassica oleracea) under subtropical plains of Jammu · 2022
- positive
  The 50% nitrogen, vermicompost and biofertilizer combination yielded a statistically higher ascorbic acid content of 51.16 mg/100g.
cites 1 paper here
RESPONSE OF FARMYARD MANURE AND INORGANIC NITROGEN ON VEGETATIVE GROWTH, LEAF YIELD AND QUALITY OF KALE (BRASSICA OLERACEAVARACEPHALA) IN TEMPERATE REGION OF KASHMIR VALLEY · 2022
- positive
  FYM at 45 t ha-1 increased vitamin C.
Effect of Climatic Conditions, and Agronomic Practices Used in Organic and Conventional Crop Production on Yield and Nutritional Composition Parameters in Potato, Cabbage, Lettuce and Onion; Results from the Long-Term NFSC-Trials · 2023
- positive
  Organic fertilization raised vitamin C concentrations in cabbage.
- positive
  Organic fertilization raised phenolic concentrations in cabbage.
Effect of Organic and Inorganic Nutrients Sources on Growth, Yield and Quality of Cauliflower In Mid Hills of Himachal Pradesh · 2023
- positive
  The specified vermicompost and jeevamrit application significantly increased curd ascorbic acid content.
Effect of Different Doses of Nutrients on Vegetative, Reproductive and Biochemical Parameters of Cauliflower (Brassica oleracea L.) cv. F1 Amazing Hybrid · 2024
- positive
  NPK (150 + 100 + 100 kg/acre) yielded maximum vitamin C of 46.35 mg/100ml.
cites 1 paper here
Effect of Nano and non-Nano NPK Fertilizers on growth, Yield and Quality of Broccoli (Brassica oleracea var. Italica) Grown under Covered and Un Covered Conditions. · 2024
- positive
  Conventional NPK increased vitamin C to 35.89 versus control.
  compared with control
Effect of organic manures and biofertilizers on growth, yield and quality of broccoli (Brassica oleracea L. Var. Italica) · 2024
- positive
  T7 had the highest ascorbic acid content of 20.63 mg/100g.
Influence of nitrogen treatments on some nutrient concentration and bioactive compounds of broccoli · 2024
- positive
  Nitrate-based fertilizer gave higher total phenolic values (0.28) than ammonium-based fertilizer in broccoli.
  compared with ammonium-based fertilizer treatments
- positive
  Nitrate-based fertilizer gave higher flavonoid values (0.56) than ammonium-based fertilizer in broccoli.
  compared with ammonium-based fertilizer treatments
- positive
  Nitrate-based fertilizer gave higher FRAP values (0.24) than ammonium-based fertilizer in broccoli.
  compared with ammonium-based fertilizer treatments
cites 1 paper here
Effect of nano titanium and organic fertilizer on broccoli growth, production, and biochemical profiles · 2024
- positive
  The combination of 20 mg/L TiO2NPs and 30 L/ha OF most significantly increased broccoli total flavonoid content compared with controls and single treatments.
  compared with control plants and single effect of TiO2NPs and OF
- positive
  40 mg/L TiO2NPs with 30 L/ha OF increased broccoli DPPH free radical scavenging activity.
cites 1 paper here
IMPACT OF NANO AND CHEMICAL FERTILIZERS ON YIELD AND QUALITY OF CABBAGE (BRASSICA OLERACEA L. VAR. CAPITATA) · 2024
- positive
  Nano fertilizers significantly improved cabbage dry matter, yield and ascorbic acid content after harvest.
- positive
  Among chemical fertilizers, 75% RDF (C3) gave the best dry matter, yield and ascorbic acid content.
  compared with chemical fertilizers
Role of seaweed extract and vermicompost application on the morphology, yield, phytochemical, and elemental composition of cauliflower plants · 2024
- positive
  F2 vermicompost produced the highest total phenolic content, 35.49 μg GAE/g FW.
Effect of Bio-fertilizers on Yield and Quality Attributes of Broccoli (Brassica oleracea var. italica L.) · 2025
- positive
  T7 gave the highest broccoli vitamin-C content (92.54 mg/100g).
Comparative evaluation of conventional and vermicompost fertilizers on broccoli ( Brassica oleracea L.) in different agroecological zones · 2025
- positive
  Conventional fertilizer gave the highest vitamin C content (1392.13 mg · kg −1) in ‘Orantes’ F 1 in Adıyaman.
- positive
  Conventional fertilizer gave the highest phenolic content (434.11 mg · kg −1) in ‘Orantes’ F 1 in Adıyaman.
cites 1 paper here
Effect of integrated nutrient management practices on growth, yield and quality of broccoli (Brassica oleracea L. var. italica) · 2025
- positive
  T10 gave the maximum ascorbic acid (89.44 mg 100 g-1).
Effects of organic and bacterial fertilizer application on cabbage characteristic and rhizosphere soil microorganisms · 2025
- positive
  OF, BC and SB produced the highest vitamin C content, 48.4 mg/kg.
Mealworm frass-based biofertilizer improves soil nutrient profile and Chinese kale growth parameters towards sustainable agriculture · 2026
- positive
  Mealworm frass with 50% chemical fertilizer generally outperformed chicken manure alone for plant growth, nutrient uptake, antioxidant activity, and vitamin C content.
  compared with CM alone
- positive
  Mealworm frass with 50% chemical fertilizer gave Chinese kale vitamin C of 227.97 mg plant −1.
- positive
  Mealworm frass with 50% chemical fertilizer gave Chinese kale antioxidant activity of 238.10 µmol TE g −1.
Compost-mixed Biochar Improves Saline Soil Properties and Enhances Brassica Oleracea var. Capitata physio-biochemical Responses · 2026
- positive
  Cabbage grown in saline soil had 56.0% greater phenolics content under CMB 20 than under CMB 0.
  compared with CMB 0
Effects of Using Vermicomposted Black Soldier Fly Larval Frass as a Germination Substrate on Emergence, Growth, and Antioxidant Content in Kale, Bell Pepper, and Tomato Seedlings · 2026
- positive
  Vermicomposted frass increased flavonoid accumulation.
Waste-Derived Fertilizers Enhance Soil Functionality: A Multi-Indicator Assessment in Mediterranean Agroecosystems · 2026
- positive
  Vermicompost 10/90 increased vitamin E in broccoli by 54% compared with the unfertilized control.
  compared with unfertilized control
- positive
  Vermicompost 10/90 increased vitamin C in broccoli by 154% compared with the unfertilized control.
  compared with unfertilized control

Papers reporting a negative result or no effect 9

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.

fertilization · Quality: phytochemicals · Brassica oleracea (wild cabbage)

Papers whose results differ, checked claim by claim 2

How these papers cite each other

Papers reporting a positive result 57

Papers reporting a negative result or no effect 9

fertilization on Brassica oleracea (wild cabbage) against other targets

fertilization · quality: phytochemicals on other organisms