Paper · 2015 · DOAJ (DOAJ: Directory of Open Access Journals)

Economics and agronomic performance of maize and soybean intercropping under various tillage and residue levels

Narayan Khatri; Tika Bahadur Karki

13
claims
13
verbatim quotes
0
citations
1
research areas
—
Not open access

Abstract

A field experiment was conducted at National Maize Research Program, Rampur, Chitwan, Nepal during rainy season of 2013 to find out the effect of tillage, residue levels and intercropping systems on yield and yield attributing characters of maize and soybean. The results revealed that the grain yield of maize and soybean was significantly influenced by intercropping systems, but not by tillage system and residue levels. The grain yield of maize obtained under sole cropping (4.76 t/ha) was significantly higher than maize + soybean intercropping system (4.27 t/ha). Similarly, the grain yield of sole soybean was significantly higher (1.99 t/ha) than that of maize + soybean intercropping system (1.26 t/ha). There was 10 percent reduction of maize yield as compared to sole maize system due to intercropping systems. Similarly, reduction of seed yield of soybean under maize and soybean intercropping system was 37 % as compared to sole soybean system. Moreover, the total grain yield equivalent of 6.45 t/ha obtained from sole soybean system was significantly higher and was followed by maize and soybean intercropping system with 4.99 t/ha. Significantly, higher Land Equivalent Ratio (1.38) was recorded with maize and soybean intercropping system over sole system (1.0). Maize and soybean intercropping system produced higher gross return, net return and Benefit: Cost ratio. Net returns and Benefit: Cost ratio obtained from maize + soybean intercropping system under zero tillage residue removed condition was higher of NRs. 1,55,478 and 2.77 respectively.

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Claims 13

Observationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Maize grain yield differed significantly by intercropping system.

Taxon
maizeZea mayse0
Treatment
intercropping systemse0
Outcome
grain yield of maizee0

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

e0

“grain yield of maize and soybean was significantly influenced by intercropping systems, but not by tillage system and residue levels”

✓ located verbatim in the source · abstract, characters 290–422 · show in text ↑
Observationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Soybean grain yield differed significantly by intercropping system.

Taxon
soybeanGlycine maxe0
Treatment
intercropping systemse0
Outcome
grain yield of maize and soybeane0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“grain yield of maize and soybean was significantly influenced by intercropping systems, but not by tillage system and residue levels”

✓ located verbatim in the source · abstract, characters 290–422 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Tillage did not significantly influence maize and soybean grain yield.

Taxon
maize and soybeanGlycine maxZea mayse0
Treatment
tillage systeme0
Outcome
grain yield of maize and soybeane0

Not reportedComparatorDirection

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“grain yield of maize and soybean was significantly influenced by intercropping systems, but not by tillage system and residue levels”

✓ located verbatim in the source · abstract, characters 290–422 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Residue levels did not significantly influence maize and soybean grain yield.

Taxon
maize and soybeanGlycine maxZea mayse0
Treatment
residue levelse0
Outcome
grain yield of maize and soybeane0

Not reportedComparatorDirection

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“grain yield of maize and soybean was significantly influenced by intercropping systems, but not by tillage system and residue levels”

✓ located verbatim in the source · abstract, characters 290–422 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Sole maize yielded 4.76 t/ha, significantly above intercropped maize at 4.27 t/ha.

Taxon
maizeZea mayse0
Treatment
sole croppinge0
Outcome
grain yield of maizee0
Direction
highere0
Value
4.76 t/hae0
Qualifier
4.27 t/hae0
Comparator
maize + soybean intercropping systeme0

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

e0

“grain yield of maize obtained under sole cropping (4.76 t/ha) was significantly higher than maize + soybean intercropping system (4.27 t/ha)”

✓ located verbatim in the source · abstract, characters 428–568 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Sole soybean yielded 1.99 t/ha, significantly above intercropped soybean at 1.26 t/ha.

Taxon
soybeanGlycine maxe0
Treatment
sole soybeane0
Outcome
grain yield of sole soybeane0
Direction
highere0
Value
1.99 t/hae0
Qualifier
1.26 t/hae0
Comparator
maize + soybean intercropping systeme0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“grain yield of sole soybean was significantly higher (1.99 t/ha) than that of maize + soybean intercropping system (1.26 t/ha)”

✓ located verbatim in the source · abstract, characters 585–711 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced maize yield by 10 percent relative to sole maize.

Taxon
maizeZea mayse0
Treatment
intercropping systemse0
Outcome
maize yielde0
Direction
reductione0
Value
10 percente0
Comparator
sole maize systeme0

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

e0

“10 percent reduction of maize yield as compared to sole maize system due to intercropping systems”

✓ located verbatim in the source · abstract, characters 723–820 · show in text ↑
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Intercropping reduced soybean seed yield by 37 % relative to sole soybean.

Taxon
soybeanGlycine maxe0
Treatment
maize and soybean intercropping systeme0
Outcome
seed yield of soybeane0
Direction
reductione0
Value
37 %e0
Comparator
sole soybean systeme0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“reduction of seed yield of soybean under maize and soybean intercropping system was 37 % as compared to sole soybean system”

✓ located verbatim in the source · abstract, characters 833–956 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Sole soybean had grain yield equivalent of 6.45 t/ha, above intercropping at 4.99 t/ha.

Taxon
soybeanGlycine maxe0
Treatment
sole soybean systeme0
Outcome
total grain yield equivalente0
Direction
highere0
Value
6.45 t/hae0
Qualifier
4.99 t/hae0
Comparator
maize and soybean intercropping systeme0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗

Verbatim

e0

“total grain yield equivalent of 6.45 t/ha obtained from sole soybean system was significantly higher and was followed by maize and soybean intercropping system with 4.99 t/ha”

✓ located verbatim in the source · abstract, characters 972–1146 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Intercropping had a land equivalent ratio of 1.38 versus 1.0 for sole cropping.

Taxon
maize and soybeanGlycine maxZea mayse0
Treatment
maize and soybean intercropping systeme0
Outcome
Land Equivalent Ratioe0
Direction
highere0
Value
1.38e0
Qualifier
1.0e0
Comparator
sole systeme0

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“higher Land Equivalent Ratio (1.38) was recorded with maize and soybean intercropping system over sole system (1.0)”

✓ located verbatim in the source · abstract, characters 1163–1278 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Intercropping produced higher gross return, net return and benefit:cost ratio.

Taxon
Maize and soybeanGlycine maxZea mayse0
Treatment
intercropping systeme0
Outcome
gross return, net return and Benefit: Cost ratioe0
Direction
highere0

Not reportedComparator

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

Glycine max
Glycine max · TaxonPublic domain · Wikimedia Commons ↗
Zea mays
Zea mays · TaxonAkwugo · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Maize and soybean intercropping system produced higher gross return, net return and Benefit: Cost ratio”

✓ located verbatim in the source · abstract, characters 1280–1383 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Intercropping under zero tillage with residue removed gave net returns of NRs. 1,55,478.

Taxon
maize + soybeane0
Treatment
zero tillage residue removed conditione0
Outcome
Net returnse0
Direction
highere0
Value
NRs. 1,55,478e0

Verbatim

e0

“Net returns and Benefit: Cost ratio obtained from maize + soybean intercropping system under zero tillage residue removed condition was higher of NRs. 1,55,478 and 2.77 respectively”

✓ located verbatim in the source · abstract, characters 1385–1566 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

Intercropping under zero tillage with residue removed gave benefit:cost ratio of 2.77.

Taxon
maize + soybeane0
Treatment
zero tillage residue removed conditione0
Outcome
Benefit: Cost ratioe0
Direction
highere0
Value
2.77e0

Verbatim

e0

“Net returns and Benefit: Cost ratio obtained from maize + soybean intercropping system under zero tillage residue removed condition was higher of NRs. 1,55,478 and 2.77 respectively”

✓ located verbatim in the source · abstract, characters 1385–1566 · show in text ↑

Zea mays · yield · Glycine max (soybean)Positive and negative results

79 papers: 58 positive, 21 negative or no effect

57 papers in the same direction as this paper · 21 in the opposite direction

  1. negative
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  3. negative

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Glycine max · yield · Zea mays (maize)Positive and negative results

180 papers: 155 positive, 25 negative or no effect

154 papers in the same direction as this paper · 18 in the opposite direction · 7 reporting no difference from an alternative

  1. no effect
  2. no effect
  3. negative

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intercropping · yield · Glycine max (soybean)Positive and negative results

218 papers: 131 positive, 87 negative or no effect

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tillage · yield · Glycine max (soybean)Positive and negative results

390 papers: 264 positive, 126 negative or no effect

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

834 papers: 613 positive, 221 negative or no effect

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

1,099 papers: 812 positive, 287 negative or no effect

286 papers in the same direction as this paper · 812 in the opposite direction

  1. positive
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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.