Paper · 2019 · Journal of Agricultural Science

Nitrogen and Potassium Fertilizers Increase Cherry Tomato Height and Yield

G. Ddamulira; R. Idd; S. Namazzi; et al.

9
claims
15
verbatim quotes
13
citations
2
research areas
✓
Open access · cc-by

Abstract

Less or no fertilizer use compromises growth and yield of cherry tomato (Solanum lycopersicum var. Cerasiforme) in Uganda. A study was conducted to determine the effect of nitrogen (N) and potassium (K) fertilizer rates on cherry tomato growth and yield. The experiment was conducted in a field during 2016B and 2017A seasons at Namulonge. The treatments included; (100, 60, 100) and (200, 60, 200) kg ha-1 of N, P, K and the control with no fertilizer application, these were laid out in a split plot design with three replications. Results revealed that tomato plants significantly (P < 0.05) responded to nitrogen and potassium fertilizer application by increasing their height and yield. The highest tomato height and yield were obtained from plots applied with 100, 60, 100 kg ha-1 of N, P and K. This rate was considered as the optimal application rate because plants applied with fertilizer above this rate were observed to have low height and yield. On the other hand, plants applied with nitrogen and potassium fertilizers below 100, 60, 100 kg ha-1, flowered and matured earlier than those in the control plots. The study showed that N and K fertilizer influenced plant height, flowering, maturity period and yield of cherry tomato. Based on these findings, use of 100, 60, 100 kg ha-1 of N, P and K is recommended for improving cherry tomato production in central Uganda, where the study was conducted, and any fertilizer rate above 100, 60, 100 kg ha-1 in the same area may be un-economical to use in cherry tomato growing.

Abstract from the paper’s OpenAlex record; open copy licensed cc-by. 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 resultpositivesignificant (as stated)measured

Claim · model-written summary

Nitrogen and potassium fertilizer increased tomato height significantly.

Treatment
nitrogen and potassium fertilizer applicatione0
Outcome
heighte0
Direction
increasinge0

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“tomato plants significantly (P < 0.05) responded to nitrogen and potassium fertilizer application by increasing their height and yield”

✓ located verbatim in the source · abstract, characters 556–690 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Nitrogen and potassium fertilizer increased tomato yield significantly.

Treatment
nitrogen and potassium fertilizer applicatione0
Outcome
yielde0
Direction
increasinge0

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“tomato plants significantly (P < 0.05) responded to nitrogen and potassium fertilizer application by increasing their height and yield”

✓ located verbatim in the source · abstract, characters 556–690 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The 100, 60, 100 kg ha-1 N, P, K rate produced the highest tomato height.

Treatment
100, 60, 100 kg ha-1 of N, P and Ke0
Outcome
tomato heighte0
Direction
higheste0

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The highest tomato height and yield were obtained from plots applied with 100, 60, 100 kg ha-1 of N, P and K”

✓ located verbatim in the source · abstract, characters 692–800 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

The 100, 60, 100 kg ha-1 N, P, K rate produced the highest tomato yield.

Treatment
100, 60, 100 kg ha-1 of N, P and Ke0
Outcome
yielde0
Direction
higheste0

Not reportedComparator

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

Solanum lycopersicum
Solanum lycopersicum · TaxonKod B · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The highest tomato height and yield were obtained from plots applied with 100, 60, 100 kg ha-1 of N, P and K”

✓ located verbatim in the source · abstract, characters 692–800 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Rates above 100, 60, 100 kg ha-1 reduced tomato height.

Treatment
fertilizer above this ratee0
Outcome
heighte0
Direction
lowe0
Comparator
100, 60, 100 kg ha-1 of N, P and Ke1

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

“plants applied with fertilizer above this rate were observed to have low height and yield”

✓ located verbatim in the source · abstract, characters 867–956 · show in text ↑
e1

“plots applied with 100, 60, 100 kg ha-1 of N, P and K”

✓ located verbatim in the source · abstract, characters 747–800 · show in text ↑
t0

“Cherry Tomato”

✓ located verbatim in the source · title, characters 44–57 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Rates above 100, 60, 100 kg ha-1 reduced tomato yield.

Treatment
fertilizer above this ratee0
Outcome
yielde0
Direction
lowe0
Comparator
100, 60, 100 kg ha-1 of N, P and Ke1

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

“plants applied with fertilizer above this rate were observed to have low height and yield”

✓ located verbatim in the source · abstract, characters 867–956 · show in text ↑
e1

“plots applied with 100, 60, 100 kg ha-1 of N, P and K”

✓ located verbatim in the source · abstract, characters 747–800 · show in text ↑
t0

“Cherry Tomato”

✓ located verbatim in the source · title, characters 44–57 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Plants receiving lower N and K rates flowered earlier than unfertilized controls.

Treatment
nitrogen and potassium fertilizers below 100, 60, 100 kg ha-1e0
Outcome
flowerede0
Direction
earliere0
Comparator
control plotse0

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

“plants applied with nitrogen and potassium fertilizers below 100, 60, 100 kg ha-1, flowered and matured earlier than those in the control plots”

✓ located verbatim in the source · abstract, characters 977–1120 · show in text ↑
t0

“Cherry Tomato”

✓ located verbatim in the source · title, characters 44–57 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Plants receiving lower N and K rates matured earlier than unfertilized controls.

Treatment
nitrogen and potassium fertilizers below 100, 60, 100 kg ha-1e0
Outcome
maturede0
Direction
earliere0
Comparator
control plotse0

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

“plants applied with nitrogen and potassium fertilizers below 100, 60, 100 kg ha-1, flowered and matured earlier than those in the control plots”

✓ located verbatim in the source · abstract, characters 977–1120 · show in text ↑
t0

“Cherry Tomato”

✓ located verbatim in the source · title, characters 44–57 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

The authors recommend 100, 60, 100 kg ha-1 N, P, K for central Uganda cherry tomato production.

Outcome
use of 100, 60, 100 kg ha-1 of N, P and Ke0
Setting
central Ugandae0

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

“use of 100, 60, 100 kg ha-1 of N, P and K is recommended for improving cherry tomato production in central Uganda”

✓ located verbatim in the source · abstract, characters 1268–1381 · show in text ↑

potassium · growth · Solanum lycopersicum (tomato)Results differ

47 papers: 34 positive, 13 negative or no effect

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

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

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potassium · yield · Solanum lycopersicum (tomato)Results differ

80 papers: 67 positive, 13 negative or no effect

66 papers in the same direction as this paper · 12 in the opposite direction · 1 reporting no difference from an alternative

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

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phosphorus · yield · Solanum lycopersicum (tomato)Results differ

101 papers: 80 positive, 21 negative or no effect

79 papers in the same direction as this paper · 17 in the opposite direction · 4 reporting no difference from an alternative

  1. no effect
  2. negative
  3. no effect

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

76 papers: 64 positive, 12 negative or no effect

63 papers in the same direction as this paper · 12 in the opposite direction

  1. no effect
  2. negative
  3. negative

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

153 papers: 108 positive, 45 negative or no effect

107 papers in the same direction as this paper · 45 in the opposite direction

  1. negative
  2. negative
  3. negative

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

210 papers: 172 positive, 38 negative or no effect

171 papers in the same direction as this paper · 31 in the opposite direction · 7 reporting no difference from an alternative

  1. positive
  2. negative
  3. negative

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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. no effect
  3. negative

664 papers more in this group

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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. positive

974 papers more in this group

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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.