Paper · 1991 · Journal of Agronomy and Crop Science

Evaluation of Intercropping Cassava/Corn/Beans (Phaseolus vulgaris L.) in Northeast Brazil

E. Zaffaroni; A. F. M. Vasconcelos; E. B. Lopes

9
claims
11
verbatim quotes
3
citations
1
research areas
—
Not open access

Abstract

Abstract Cassava, corn and drybeans were tested under sole cropping and under all possible intercropping combinations in Paraiba State, Northeast Brazil. The crops were planted with and without fertilizer (N, P, K), which generated fourteen cropping systems. Yields of beans were not affected by either intercropping systems or fertilization. Yields of corn and cassava were affected by intercropping systems, fertilizer, and cropping systems fertilizer interaction. LER values were significantly different among cropping systems but were not affected by fertilization. This indicates that the advantage of intercropping was not improved by the addition of nutrients.

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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 resultno effectmeasured

Claim · model-written summary

Bean yields were not affected by intercropping systems or fertilization.

Taxon
beanse1
Treatment
intercropping systems or fertilizatione1
Outcome
Yieldse1
Direction
not affectede1

Not reportedComparator

Verbatim

e1

“Yields of beans were not affected by either intercropping systems or fertilization”

✓ located verbatim in the source · abstract, characters 259–341 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Corn yield was affected by intercropping systems.

Treatment
intercropping systemse2
Outcome
Yieldse2

Not reportedComparatorDirection

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e2

“Yields of corn and cassava were affected by intercropping systems, fertilizer, and cropping systems fertilizer interaction”

✓ located verbatim in the source · abstract, characters 343–465 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Cassava yield was affected by intercropping systems.

Treatment
intercropping systemse2
Outcome
Yieldse2

Not reportedComparatorDirection

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

Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗

Verbatim

e2

“Yields of corn and cassava were affected by intercropping systems, fertilizer, and cropping systems fertilizer interaction”

✓ located verbatim in the source · abstract, characters 343–465 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Corn yield was affected by fertilizer.

Treatment
fertilizere2
Outcome
Yieldse2

Not reportedComparatorDirection

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e2

“Yields of corn and cassava were affected by intercropping systems, fertilizer, and cropping systems fertilizer interaction”

✓ located verbatim in the source · abstract, characters 343–465 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Cassava yield was affected by fertilizer.

Treatment
fertilizere2
Outcome
Yieldse2

Not reportedComparatorDirection

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

Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗

Verbatim

e2

“Yields of corn and cassava were affected by intercropping systems, fertilizer, and cropping systems fertilizer interaction”

✓ located verbatim in the source · abstract, characters 343–465 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Corn yield was affected by the cropping systems fertilizer interaction.

Treatment
cropping systems fertilizer interactione2
Outcome
Yieldse2

Not reportedComparatorDirection

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

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e2

“Yields of corn and cassava were affected by intercropping systems, fertilizer, and cropping systems fertilizer interaction”

✓ located verbatim in the source · abstract, characters 343–465 · show in text ↑
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Cassava yield was affected by the cropping systems fertilizer interaction.

Treatment
cropping systems fertilizer interactione2
Outcome
Yieldse2

Not reportedComparatorDirection

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

Manihot esculenta
Manihot esculenta · Taxon葉子 · CC0 · iNaturalist ↗

Verbatim

e2

“Yields of corn and cassava were affected by intercropping systems, fertilizer, and cropping systems fertilizer interaction”

✓ located verbatim in the source · abstract, characters 343–465 · show in text ↑
Intervention effectobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

LER values were significantly different among cropping systems.

Taxon
Cassava/Corn/Beanst0
Treatment
cropping systemse3
Outcome
LER valuese3

Not reportedComparatorDirection

Verbatim

t0

“Cassava/Corn/Beans”

✓ located verbatim in the source · title, characters 28–46 · show in text ↑
e3

“LER values were significantly different among cropping systems but were not affected by fertilization”

✓ located verbatim in the source · abstract, characters 467–568 · show in text ↑
Intervention effectobservedoriginal resultno effectmeasured

Claim · model-written summary

LER values were not affected by fertilization.

Taxon
Cassava/Corn/Beanst0
Treatment
fertilizatione3
Outcome
LER valuese3
Direction
not affectede3

Not reportedComparator

Verbatim

t0

“Cassava/Corn/Beans”

✓ located verbatim in the source · title, characters 28–46 · show in text ↑
e3

“LER values were significantly different among cropping systems but were not affected by fertilization”

✓ located verbatim in the source · abstract, characters 467–568 · show in text ↑

intercropping · yield · Phaseolus vulgaris (common bean)Results differ

67 papers: 37 positive, 30 negative or no effect

29 papers in the same direction as this paper · 37 in the opposite direction

  1. positive
  2. positive
  3. positive

63 papers more in this group

See all 67 papers →

fertilization · yield · Manihot esculenta (cassava)Positive and negative results

153 papers: 141 positive, 12 negative or no effect

11 papers in the same direction as this paper · 141 in the opposite direction

  1. positive
  2. positive
  3. positive

149 papers more in this group

See all 153 papers →

fertilization · yield · Phaseolus vulgaris (common bean)Positive and negative results

376 papers: 331 positive, 45 negative or no effect

44 papers in the same direction as this paper · 331 in the opposite direction

  1. positive
  2. positive
  3. positive

372 papers more in this group

See all 376 papers →

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

3,908 papers: 3,485 positive, 423 negative or no effect

422 papers in the same direction as this paper · 3,485 in the opposite direction

  1. positive
  2. positive
  3. positive

3,904 papers more in this group

See all 3,908 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.