Paper · 2026 · Urban Agriculture & Regional Food Systems

Synergistic effects of vermicompost and biochar amendments on cherry tomato production in an urban rooftop garden: A 2‐year study

Mohammad Mahbub Islam; Robiul Islam; Rezowana Nizam; et al.

9
claims
18
verbatim quotes
0
citations
2
research areas
✓
Open access · cc-by-nc-nd

Abstract

Abstract Urban agriculture has emerged as a practical strategy to strengthen local food systems in cities with limited land availability. Rooftop gardening, in particular, offers opportunities for fresh vegetable production, but the sustainability of this practice depends heavily on soil media preparation. This study evaluated the growth, physiology, and yield response of cherry tomato ( Solanum lycopersicum var. cerasiforme ) in different rooftop soil media supplemented with vermicompost and biochar. A 2‐year experiment was conducted during the winter season via a completely randomized design with four replications and nine treatments consisting of varying proportions of soil (74%–100%), vermicompost (10%–20%), and biochar (3%–6%). The results indicated that plant growth, physiology, and yield traits were significantly influenced by media composition. The combined application of vermicompost and biochar consistently outperformed the individual applications. The treatments with 74% soil, 20% vermicompost, and 6% biochar produced the tallest plants, the highest leaf number, thick stems, high soil plant analysis development values (leaf greenness), high relative water content, and the highest fruit yield across both years. Although fruit yield declined by 20.49% in the second year due to a reduced number of fruits per plant, residual amendment effects continued to enhance plant performance relative to the untreated soil. These findings demonstrate that integrating vermicompost and biochar into rooftop soil media improves soil health, plant physiology, and crop productivity. Such practices represent an effective strategy for sustainable rooftop farming and can contribute to resilient urban food systems in land‐constrained cities.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗

The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.

Claims 9

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Combined vermicompost and biochar outperformed separate applications.

Treatment
combined application of vermicompost and biochare0
Outcome
outperformede0
Direction
outperformede0
Comparator
individual applicationse0

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The combined application of vermicompost and biochar consistently outperformed the individual applications.”

✓ located verbatim in the source · abstract, characters 865–972 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The 74% soil, 20% vermicompost and 6% biochar medium gave tallest plants.

Treatment
74% soil, 20% vermicompost, and 6% biochare0
Outcome
tallest plantse0
Direction
talleste0

Not reportedComparator

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The treatments with 74% soil, 20% vermicompost, and 6% biochar produced the tallest plants, the highest leaf number, thick stems, high soil plant analysis development values (leaf greenness), high relative water content, and the highest fruit yield across both years.”

✓ located verbatim in the source · abstract, characters 973–1240 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The 74% soil, 20% vermicompost and 6% biochar medium gave highest leaf number.

Treatment
74% soil, 20% vermicompost, and 6% biochare0
Outcome
highest leaf numbere0
Direction
higheste0

Not reportedComparator

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The treatments with 74% soil, 20% vermicompost, and 6% biochar produced the tallest plants, the highest leaf number, thick stems, high soil plant analysis development values (leaf greenness), high relative water content, and the highest fruit yield across both years.”

✓ located verbatim in the source · abstract, characters 973–1240 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The 74% soil, 20% vermicompost and 6% biochar medium gave thick stems.

Treatment
74% soil, 20% vermicompost, and 6% biochare0
Outcome
thick stemse0
Direction
thicke0

Not reportedComparator

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The treatments with 74% soil, 20% vermicompost, and 6% biochar produced the tallest plants, the highest leaf number, thick stems, high soil plant analysis development values (leaf greenness), high relative water content, and the highest fruit yield across both years.”

✓ located verbatim in the source · abstract, characters 973–1240 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The 74% soil, 20% vermicompost and 6% biochar medium gave soil plant analysis development values (leaf greenness).

Treatment
74% soil, 20% vermicompost, and 6% biochare0
Outcome
soil plant analysis development values (leaf greenness)e0
Direction
highe0

Not reportedComparator

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The treatments with 74% soil, 20% vermicompost, and 6% biochar produced the tallest plants, the highest leaf number, thick stems, high soil plant analysis development values (leaf greenness), high relative water content, and the highest fruit yield across both years.”

✓ located verbatim in the source · abstract, characters 973–1240 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The 74% soil, 20% vermicompost and 6% biochar medium gave relative water content.

Treatment
74% soil, 20% vermicompost, and 6% biochare0
Outcome
relative water contente0
Direction
highe0

Not reportedComparator

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The treatments with 74% soil, 20% vermicompost, and 6% biochar produced the tallest plants, the highest leaf number, thick stems, high soil plant analysis development values (leaf greenness), high relative water content, and the highest fruit yield across both years.”

✓ located verbatim in the source · abstract, characters 973–1240 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

The 74% soil, 20% vermicompost and 6% biochar medium gave fruit yield.

Treatment
74% soil, 20% vermicompost, and 6% biochare0
Outcome
fruit yielde0
Direction
higheste0

Not reportedComparator

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“The treatments with 74% soil, 20% vermicompost, and 6% biochar produced the tallest plants, the highest leaf number, thick stems, high soil plant analysis development values (leaf greenness), high relative water content, and the highest fruit yield across both years.”

✓ located verbatim in the source · abstract, characters 973–1240 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑
Observationobservedoriginal resultnegativemeasured

Claim · model-written summary

Fruit yield was 20.49% lower in year two, attributed to fewer fruits per plant.

Outcome
fruit yielde0
Direction
declinede0
Value
20.49%e0
Qualifier
reduced number of fruits per plante0

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“fruit yield declined by 20.49% in the second year due to a reduced number of fruits per plant”

✓ located verbatim in the source · abstract, characters 1250–1343 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Residual amendments enhanced plant performance compared with untreated soil.

Treatment
residual amendment effectse0
Outcome
plant performancee0
Direction
enhancee0
Comparator
untreated soile0

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

Solanum lycopersicum var. cerasiforme
Solanum lycopersicum var. cerasiforme · TaxonJS · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e0

“residual amendment effects continued to enhance plant performance relative to the untreated soil”

✓ located verbatim in the source · abstract, characters 1345–1441 · show in text ↑
e1

“cherry tomato ( Solanum lycopersicum var. cerasiforme )”

✓ located verbatim in the source · abstract, characters 375–430 · show in text ↑

biochar · yield · Solanum lycopersicum (tomato)Results differ

56 papers: 51 positive, 5 negative or no effect

50 papers in the same direction as this paper · 5 in the opposite direction

  1. positive
  2. no effect
  3. no effect

52 papers more in this group

See all 56 papers →

biochar · growth · Solanum lycopersicum (tomato)Results differ

80 papers: 71 positive, 9 negative or no effect

70 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative

  1. positive
  2. no effect
  3. negative

76 papers more in this group

See all 80 papers →

biochar · physiology: pigments · Solanum lycopersicum (tomato)Positive and negative results

13 papers: 12 positive, 1 negative or no effect

11 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive

9 papers more in this group

See all 13 papers →

fertilization · physiology: water · Solanum lycopersicum (tomato)Positive and negative results

41 papers: 33 positive, 8 negative or no effect

32 papers in the same direction as this paper · 8 in the opposite direction

  1. negative
  2. no effect
  3. no effect

37 papers more in this group

See all 41 papers →

fertilization · physiology: pigments · Solanum lycopersicum (tomato)Positive and negative results

105 papers: 84 positive, 21 negative or no effect

83 papers in the same direction as this paper · 19 in the opposite direction · 2 reporting no difference from an alternative

  1. positive
  2. no effect
  3. no effect

101 papers more in this group

See all 105 papers →

other · yield · Solanum lycopersicum (tomato)Positive and negative results

130 papers: 117 positive, 13 negative or no effect

116 papers in the same direction as this paper · 13 in the opposite direction

  1. no effect
  2. no effect
  3. no effect

126 papers more in this group

See all 130 papers →

fertilization · growth · Solanum lycopersicum (tomato)Positive and negative results

668 papers: 567 positive, 101 negative or no effect

566 papers in the same direction as this paper · 93 in the opposite direction · 8 reporting no difference from an alternative

  1. positive
  2. positive
  3. positive

664 papers more in this group

See all 668 papers →

fertilization · yield · Solanum lycopersicum (tomato)Positive and negative results

978 papers: 850 positive, 128 negative or no effect

849 papers in the same direction as this paper · 104 in the opposite direction · 24 reporting no difference from an alternative

  1. positive
  2. positive
  3. no effect

974 papers more in this group

See all 978 papers →

8 of 9 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.

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.