Paper · 1981

The influence of nitrogen fertilization and population density on yield and yield components of three sorghum varieties

E.M. Ricamonte; A. C. Alferez

8
claims
24
verbatim quotes
0
citations
2
research areas
—
Not open access

Abstract

Field experiment was conducted to evaluate the response of Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions. The levels of nitrogen were 60, 100 and 150 kg per hectare. The population densities used were 200,000, 250,000 and 300,000 plants per hectare. The computed grain yield per hectare of the three varieties was highest at 150 kg N per hectare (14.1 tons) and lowest at 50 kg N per hectare C9.0 tons). Grain yield also increased as plant population was increased from 200, 000 (9.7 tons) to 250,000 (2.0 tons) plants per hectare. Yield did not increase beyond 250,000 plants per hectare. Incremental nitrogen increased panicle length, weight, and grain yield per panicle. These yield components de;reased, however, with increasing plant population in all the three varieties. Blooming period was shortened by increasing nitrogen but not by plant population. Plant height was not significantly affected by both nitrogen fertilization and plant population.

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Claims 8

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Grain yield per hectare was highest at 150 kg N per hectare (14.1 tons) compared with 50 kg N per hectare.

Taxon
sorghumSorghumt0
Material
Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5e0
Treatment
150 kg N per hectaree1
Outcome
grain yield per hectaree1
Direction
higheste1
Value
14.1 tonse1
Comparator
50 kg N per hectaree1
Setting
Central Luzone0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

t0

“three sorghum varieties”

✓ located verbatim in the source · title, characters 96–119 · show in text ↑
e0

“Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions”

✓ located verbatim in the source · abstract, characters 59–255 · show in text ↑
e1

“The computed grain yield per hectare of the three varieties was highest at 150 kg N per hectare (14.1 tons) and lowest at 50 kg N per hectare”

✓ located verbatim in the source · abstract, characters 401–542 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Grain yield increased as plant population was raised from 200,000 to 250,000 plants per hectare; the abstract reports 2.0 tons at 250,000.

Taxon
sorghumSorghumt0
Material
Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5e0
Treatment
plant populatione2
Outcome
Grain yielde2
Direction
increasede2
Value
2.0 tonse2
Comparator
200, 000 (9.7 tons)e2
Setting
Central Luzone0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

t0

“three sorghum varieties”

✓ located verbatim in the source · title, characters 96–119 · show in text ↑
e0

“Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions”

✓ located verbatim in the source · abstract, characters 59–255 · show in text ↑
e2

“Grain yield also increased as plant population was increased from 200, 000 (9.7 tons) to 250,000 (2.0 tons) plants per hectare”

✓ located verbatim in the source · abstract, characters 555–681 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Grain yield did not increase beyond 250,000 plants per hectare.

Taxon
sorghumSorghumt0
Material
Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5e0
Treatment
250,000 plants per hectaree3
Outcome
Yielde3
Direction
did not increasee3
Setting
Central Luzone0

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

t0

“three sorghum varieties”

✓ located verbatim in the source · title, characters 96–119 · show in text ↑
e0

“Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions”

✓ located verbatim in the source · abstract, characters 59–255 · show in text ↑
e3

“Yield did not increase beyond 250,000 plants per hectare”

✓ located verbatim in the source · abstract, characters 683–739 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Incremental nitrogen increased panicle length, panicle weight and grain yield per panicle.

Taxon
sorghumSorghumt0
Material
Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5e0
Organ / stage
paniclee4
Treatment
Incremental nitrogene4
Outcome
panicle length, weight, and grain yield per paniclee4
Direction
increasede4
Setting
Central Luzone0

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

t0

“three sorghum varieties”

✓ located verbatim in the source · title, characters 96–119 · show in text ↑
e0

“Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions”

✓ located verbatim in the source · abstract, characters 59–255 · show in text ↑
e4

“Incremental nitrogen increased panicle length, weight, and grain yield per panicle”

✓ located verbatim in the source · abstract, characters 741–823 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Yield components decreased with increasing plant population in all three varieties.

Taxon
sorghumSorghumt0
Material
Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5e0
Treatment
increasing plant populatione5
Outcome
yield componentse5
Direction
de;reasede5
Setting
Central Luzone0

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

t0

“three sorghum varieties”

✓ located verbatim in the source · title, characters 96–119 · show in text ↑
e0

“Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions”

✓ located verbatim in the source · abstract, characters 59–255 · show in text ↑
e5

“These yield components de;reased, however, with increasing plant population in all the three varieties”

✓ located verbatim in the source · abstract, characters 825–927 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Blooming period was shortened by increasing nitrogen.

Taxon
sorghumSorghumt0
Material
Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5e0
Treatment
increasing nitrogene6
Outcome
Blooming periode6
Direction
shortenede6
Setting
Central Luzone0

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

t0

“three sorghum varieties”

✓ located verbatim in the source · title, characters 96–119 · show in text ↑
e0

“Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions”

✓ located verbatim in the source · abstract, characters 59–255 · show in text ↑
e6

“Blooming period was shortened by increasing nitrogen but not by plant population”

✓ located verbatim in the source · abstract, characters 929–1009 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

Blooming period was not affected by plant population.

Taxon
sorghumSorghumt0
Material
Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5e0
Treatment
plant populatione6
Outcome
Blooming periode6
Setting
Central Luzone0

Not reportedComparatorDirection

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

t0

“three sorghum varieties”

✓ located verbatim in the source · title, characters 96–119 · show in text ↑
e0

“Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions”

✓ located verbatim in the source · abstract, characters 59–255 · show in text ↑
e6

“Blooming period was shortened by increasing nitrogen but not by plant population”

✓ located verbatim in the source · abstract, characters 929–1009 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Plant height was not significantly affected by nitrogen fertilization or plant population.

Taxon
sorghumSorghumt0
Material
Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5e0
Treatment
nitrogen fertilization and plant populatione7
Outcome
Plant heighte7
Direction
not significantly affectede7
Setting
Central Luzone0

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

t0

“three sorghum varieties”

✓ located verbatim in the source · title, characters 96–119 · show in text ↑
e0

“Cosor 3, BPI [Bureau of Plant Industry] Sor 1 and UPLB [University of the Philippines at Los Banos] SG 5 to varying levels of nitrogen and plant plantation densities under Central Luzon conditions”

✓ located verbatim in the source · abstract, characters 59–255 · show in text ↑
e7

“Plant height was not significantly affected by both nitrogen fertilization and plant population”

✓ located verbatim in the source · abstract, characters 1011–1106 · show in text ↑

fertilization · growth · SorghumResults differ

120 papers: 104 positive, 16 negative or no effect

15 papers in the same direction as this paper · 104 in the opposite direction

  1. positive
  2. positive
  3. positive

116 papers more in this group

See all 120 papers →

density · phenology · SorghumPositive and negative results

2 papers: 1 positive, 1 negative or no effect

1 in the opposite direction

  1. positive
See all 2 papers →

density · growth · SorghumPositive and negative results

34 papers: 22 positive, 12 negative or no effect

11 papers in the same direction as this paper · 22 in the opposite direction

  1. positive
  2. positive
  3. positive

30 papers more in this group

See all 34 papers →

density · yield · SorghumPositive and negative results

98 papers: 83 positive, 15 negative or no effect

82 papers in the same direction as this paper · 14 in the opposite direction · 1 reporting no difference from an alternative

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

94 papers more in this group

See all 98 papers →

nitrogen · yield · SorghumPositive and negative results

290 papers: 264 positive, 26 negative or no effect

263 papers in the same direction as this paper · 22 in the opposite direction · 4 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

286 papers more in this group

See all 290 papers →

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.