The 50% nitrogen, vermicompost and biofertilizer combination yielded a statistically higher ascorbic acid content of 51.16 mg/100g.

Azotobacter · quality: phytochemicals · Brassica oleracea (wild cabbage)Results agree

3 papers in the same direction as this claim

1. positive
   PSB plus Azotobacter gave maximum Vitamin C of 79.55 mg/100 g.

   Effect of mulching and bio-fertilizers on quality characteristics of sprouting Broccoli (Brassica oleracea var. italica L.) · 2018

   Same direction

2. positive
   Treatment T9 was superior for vitamin C in cauliflower.

   Response of foliar application of cow-urine and nitrogen fixing bacterial inoculants on quality of cauliflower (Brassica oleracea L. var. botrytis) cv. White crystal grown under naturally ventilated polyhouse condition · 2024

   Same direction

3. positive
   The combined treatment increased curd ascorbic acid to 87.00 mg/100g.

   Effect of biofertilizers (Azotobacter and Azospirillum) alone and in combination with reduced levels of nitrogen on post harvest quality of cauliflower Cv. Snowball-16 · 2025

   Same direction

fertilization · quality: phytochemicals · Brassica oleracea (wild cabbage)Results differ

56 papers in the same direction as this claim · 9 in the opposite direction

1. positive
   The combined treatment gave maximum vitamin A of 126.76 µg/100g.

   Enhancement of head yield and quality of cabbage (Brassica oleracea) by combining different sources of nutrients · 2012

   Same directionCited by this paper

2. no effect
   Total glucosinolate content did not differ significantly between rich and poor sulphur fertilisation.

   Total and individual glucosinolate contents in inflorescences of eight broccoli cultivars grown under various climatic and fertilisation conditions · 2003 · compared with poor

   Opposite direction

3. no effect
   Nitrogen fertilization rate does not affect broccoli weight and vitamin C losses during storage in the first year.

   Effect of nitrogen fertilization on head size, vitamin C content and storage life of broccoli (Brassica oleracea var. Italica) · 1994

   Opposite direction

4. negative
   Nitrogen and sulfur fertilization tended to decrease broccoli vitamin C by about 9.2% versus control.

   Selected yield and qualitative parameters of broccoli in dependence on nitrogen,sulfur, and zinc fertilization · 2016 · compared with the control

   Opposite direction

5. negative
   Higher ammonium proportion decreased vitamin C in kale leaves and stalks.

   Effect of Ammonium and Nitrate Ratio on Nutritional Quality of Chinese Kale · 2012

   Opposite direction

6. negative
   Fertilised treatments had significantly lower ascorbic acid content (282-301 mg/kg) than the unfertilised control (334 mg/kg).

   Digestate is equal or a better alternative to mineral fertilization of kohlrabi · 2013 · compared with unfertilised control

   Opposite direction

7. negative
   Phenolic content tended to decrease as vermicompost rose.

   Vermicompost soil amendment influences yield, growth responses and nutritional value of Kale (Brassica oleracea Acephala group), Radish (Raphanus sativus) and Tomato (Solanum lycopersicum L) · 2021

   Opposite direction

8. no effect
   Fertilization did not influence antioxidant capacity, total phenols, ascorbic acid or phenolic acids.

   EFFECT OF ANAEROBIC DIGESTATES APPLICATION ON QUALITATIVE TRAITS IN EARLY AND LATE CAULIFLOWER · 2013

   Opposite direction

57 papers more in this group

phosphorus · quality: phytochemicals · Brassica oleracea (wild cabbage)Positive and negative results

5 papers in the same direction as this claim · 1 in the opposite direction

1. no effect
   Phosphorus had no significant effect on the vitamin C content of broccoli.

   Effect of Nitrogen,Phosphorus and Potassium on Yield and Quality of Broccoli · 2011

   Opposite direction

2. positive
   DMPP significantly increased cabbage vitamin C, soluble sugar and K contents.

   Effects of Nitrogen Fertilizer with Nitrification Inhibitor DMPP (3,4-Dimethylpyrazole phosphate) on Nitrate Accumulation and Quality of Cabbage(Brassica campastris L.ssp. pekinesis) · 2004

   Same direction

3. positive
   Phosphorus deficiency significantly decreased yield, vitamin C, and finished product rate.

   Effect of Nitrogen,Phosphorus,Potassium and Boron on Nutrient Absorption,Distribution,Yield and Quality of Broccoli · 2008

   Same directionAbout lacking this nutrient, so it counts the other way round

4. positive
   PSB with boron significantly increased broccoli sprout Vitamin C content compared with the other treatments.

   Effect of different doses of micronutrients with phosphate solubilizing bacteria on growth, yield and quality of broccoli (Brassica oleraceae) · 2020 · compared with the treatments

   Same direction

5. positive
   Increasing N and P doses under mulch increased growth, yield and quality traits other than vitamin C and beta-carotene.

   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

   Same direction

6. positive
   The fertilizer treatment maximized Ascorbic acid at 86.72 mg-100 g.

   Effect of levels of nitrogen with boron and zinc on quality and chlorophyll content in broccoli (Brassica oleraceae L. Var. italica) Cv. Phule Ganesh · 2024

   Same direction