Paper · 1970

Maize and sorghum - prospective intercrops in Malaysian plantations.

Ruth Goh Pek Ean

7
claims
9
verbatim quotes
0
citations
1
research areas
—
Not open access

Abstract

In a discussion of the agronomy of maize and sorghum in West Malaysia, experiments on soil type, spacing, fertilizers, weed control and pests and diseases are described. Highest grain yields were obtained at between-row spacing of 18 and 24 in with both maize and sorghum and within-row spacing of 9 in with maize and 2-4 in with sorghum. Grain yields of maize and sorghum were increased significantly by applying 10 lb atrazine/ac pre-emergence and at 50 days after sowing. Yields were significantly increased by ammonium sulphate at rates up to 250 kg N/ha, split applications giving higher yields than a single application at sowing. It was concluded that maize and sorghum may be suitable as intercrops for oil palm and other plantation crops during the period before bearing

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Claims 7

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Grain yields of maize and sorghum were highest at between-row spacing of 18 and 24 in.

Taxon
maize and sorghumSorghumZea mayse1
Treatment
between-row spacing of 18 and 24 ine1
Outcome
grain yieldse1
Direction
Higheste1

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 ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Highest grain yields were obtained at between-row spacing of 18 and 24 in with both maize and sorghum and within-row spacing of 9 in with maize and 2-4 in with sorghum”

✓ located verbatim in the source · abstract, characters 170–337 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Maize grain yield was highest at within-row spacing of 9 in.

Taxon
maizeZea mayse1
Treatment
within-row spacing of 9 ine1
Outcome
grain yieldse1
Direction
Higheste1

Not reportedComparator

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

Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Highest grain yields were obtained at between-row spacing of 18 and 24 in with both maize and sorghum and within-row spacing of 9 in with maize and 2-4 in with sorghum”

✓ located verbatim in the source · abstract, characters 170–337 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Sorghum grain yield was highest at within-row spacing of 2-4 in.

Taxon
sorghumSorghume1
Treatment
2-4 in with sorghume1
Outcome
grain yieldse1
Direction
Higheste1

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

e1

“Highest grain yields were obtained at between-row spacing of 18 and 24 in with both maize and sorghum and within-row spacing of 9 in with maize and 2-4 in with sorghum”

✓ located verbatim in the source · abstract, characters 170–337 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Applying 10 lb atrazine/ac pre-emergence and at 50 days after sowing significantly increased grain yields of maize and sorghum.

Taxon
maize and sorghumSorghumZea mayse1
Treatment
10 lb atrazine/ace1
Outcome
Grain yieldse1
Direction
increasede1

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 ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Grain yields of maize and sorghum were increased significantly by applying 10 lb atrazine/ac pre-emergence and at 50 days after sowing”

✓ located verbatim in the source · abstract, characters 339–473 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Ammonium sulphate at rates up to 250 kg N/ha significantly increased yields.

Taxon
maize and sorghumSorghumZea mayse2
Treatment
ammonium sulphate at rates up to 250 kg N/hae1
Outcome
Yieldse1
Direction
increasede1

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 ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“Yields were significantly increased by ammonium sulphate at rates up to 250 kg N/ha”

✓ located verbatim in the source · abstract, characters 475–558 · show in text ↑
e2

“Highest grain yields were obtained at between-row spacing of 18 and 24 in with both maize and sorghum and within-row spacing of 9 in with maize and 2-4 in with sorghum”

✓ located verbatim in the source · abstract, characters 170–337 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Split applications of ammonium sulphate gave higher yields than a single application at sowing.

Taxon
maize and sorghumSorghumZea mayse2
Treatment
split applicationse1
Outcome
yieldse1
Direction
highere1
Comparator
a single application at sowinge1

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 ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“split applications giving higher yields than a single application at sowing”

✓ located verbatim in the source · abstract, characters 560–635 · show in text ↑
e2

“Highest grain yields were obtained at between-row spacing of 18 and 24 in with both maize and sorghum and within-row spacing of 9 in with maize and 2-4 in with sorghum”

✓ located verbatim in the source · abstract, characters 170–337 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

Maize and sorghum may be suitable as intercrops for oil palm and other plantation crops before bearing.

Taxon
maize and sorghumSorghumZea mayse1
Outcome
intercrops for oil palm and other plantation cropse1

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 ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e1

“maize and sorghum may be suitable as intercrops for oil palm and other plantation crops during the period before bearing”

✓ located verbatim in the source · abstract, characters 659–779 · show in text ↑

ammonium sulfate · yield · Zea mays (maize)Results differ

37 papers: 31 positive, 6 negative or no effect

30 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative

  1. no effect
  2. negative
  3. negative

33 papers more in this group

See all 37 papers →

atrazine · yield · SorghumResults differ

43 papers: 32 positive, 11 negative or no effect

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

  1. negative
  2. no effect
  3. no effect

39 papers more in this group

See all 43 papers →

atrazine · yield · Zea mays (maize)Results differ

240 papers: 205 positive, 35 negative or no effect

204 papers in the same direction as this paper · 29 in the opposite direction · 6 reporting no difference from an alternative

  1. negative
  2. no effect
  3. negative

236 papers more in this group

See all 240 papers →

ammonium sulfate · yield · SorghumResults agree

6 papers: 6 positive, 0 negative or no effect

5 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

2 papers more in this group

See all 6 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 →

density · yield · Zea mays (maize)Positive and negative results

658 papers: 519 positive, 139 negative or no effect

518 papers in the same direction as this paper · 132 in the opposite direction · 7 reporting no difference from an alternative

  1. negative
  2. negative
  3. no effect

654 papers more in this group

See all 658 papers →

nitrogen · yield · Zea mays (maize)Positive and negative results

2,185 papers: 1,906 positive, 279 negative or no effect

1,905 papers in the same direction as this paper · 234 in the opposite direction · 45 reporting no difference from an alternative

  1. negative
  2. no effect
  3. negative

2,181 papers more in this group

See all 2,185 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.