Abstract
Abstract Cowpea [ Vigna unguiculata (L.) Walp] has not been considered as a doublecrop alternative in the midwestern United States. Forage potential of cowpea following green peas ( Pisum sativum L.) was studied in two field experiments in central and southern Minnesota. Dry-matter yield was higher in 1981 than in 1982 for all cowpea cultivars tested. Increasing the plant population improved yields for ‘California Black-eye Number 5’, ‘Alabama Giant Blackeye’, ‘Freezegreen’, and the breeding lines MN 139, MN 150, and Au 704, but not for ‘Colossus’. In vitro dry matter digestibility (IVDMD) was >63% for both stems and leaves in all cultivars and was not affected by plant population. Crude protein (CP) in leaves exceeded 20% for all treatments. We conclude that cowpea has excellent potential for supplying high-quality forage from double-cropping systems in the midwestern United States.
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Claims 12
Claim · model-written summary
Cowpea dry matter yield was higher in 1981 than 1982.
- Taxon
- cowpea
Vigna unguiculatae0 - Outcome
- Dry-matter yielde0
- Direction
- highere0
- Comparator
- 1982e0
- Setting
- 1981e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry-matter yield was higher in 1981 than in 1982 for all cowpea cultivars tested.”
Claim · model-written summary
Increasing population improved cowpea yield for ‘California Black-eye Number 5’.
- Taxon
- CowpeaVigna unguiculatat0
- Material
- ‘California Black-eye Number 5’e0
- Treatment
- Increasing the plant populatione0
- Outcome
- yieldse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the plant population improved yields for ‘California Black-eye Number 5’, ‘Alabama Giant Blackeye’, ‘Freezegreen’, and the breeding lines MN 139, MN 150, and Au 704, but not for ‘Colossus’.”
t0“Cowpea”
Claim · model-written summary
Increasing population improved cowpea yield for ‘Alabama Giant Blackeye’.
- Taxon
- CowpeaVigna unguiculatat0
- Material
- ‘Alabama Giant Blackeye’e0
- Treatment
- Increasing the plant populatione0
- Outcome
- yieldse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the plant population improved yields for ‘California Black-eye Number 5’, ‘Alabama Giant Blackeye’, ‘Freezegreen’, and the breeding lines MN 139, MN 150, and Au 704, but not for ‘Colossus’.”
t0“Cowpea”
Claim · model-written summary
Increasing population improved cowpea yield for ‘Freezegreen’.
- Taxon
- CowpeaVigna unguiculatat0
- Material
- ‘Freezegreen’e0
- Treatment
- Increasing the plant populatione0
- Outcome
- yieldse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the plant population improved yields for ‘California Black-eye Number 5’, ‘Alabama Giant Blackeye’, ‘Freezegreen’, and the breeding lines MN 139, MN 150, and Au 704, but not for ‘Colossus’.”
t0“Cowpea”
Claim · model-written summary
Increasing population improved cowpea yield for MN 139.
- Taxon
- CowpeaVigna unguiculatat0
- Material
- MN 139e0
- Treatment
- Increasing the plant populatione0
- Outcome
- yieldse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the plant population improved yields for ‘California Black-eye Number 5’, ‘Alabama Giant Blackeye’, ‘Freezegreen’, and the breeding lines MN 139, MN 150, and Au 704, but not for ‘Colossus’.”
t0“Cowpea”
Claim · model-written summary
Increasing population improved cowpea yield for MN 150.
- Taxon
- CowpeaVigna unguiculatat0
- Material
- MN 150e0
- Treatment
- Increasing the plant populatione0
- Outcome
- yieldse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the plant population improved yields for ‘California Black-eye Number 5’, ‘Alabama Giant Blackeye’, ‘Freezegreen’, and the breeding lines MN 139, MN 150, and Au 704, but not for ‘Colossus’.”
t0“Cowpea”
Claim · model-written summary
Increasing population improved cowpea yield for Au 704.
- Taxon
- CowpeaVigna unguiculatat0
- Material
- Au 704e0
- Treatment
- Increasing the plant populatione0
- Outcome
- yieldse0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the plant population improved yields for ‘California Black-eye Number 5’, ‘Alabama Giant Blackeye’, ‘Freezegreen’, and the breeding lines MN 139, MN 150, and Au 704, but not for ‘Colossus’.”
t0“Cowpea”
Claim · model-written summary
Increasing population did not improve Colossus yield.
- Taxon
- CowpeaVigna unguiculatat0
- Material
- ‘Colossus’e0
- Treatment
- Increasing the plant populatione0
- Outcome
- yieldse0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the plant population improved yields for ‘California Black-eye Number 5’, ‘Alabama Giant Blackeye’, ‘Freezegreen’, and the breeding lines MN 139, MN 150, and Au 704, but not for ‘Colossus’.”
t0“Cowpea”
Claim · model-written summary
Stem and leaf digestibility exceeded 63% across cowpea cultivars.
- Taxon
- CowpeaVigna unguiculatat0
- Organ / stage
- stems and leavese0
- Outcome
- In vitro dry matter digestibilitye0
- Value
- >63%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In vitro dry matter digestibility (IVDMD) was >63% for both stems and leaves in all cultivars and was not affected by plant population.”
t0“Cowpea”
Claim · model-written summary
Plant population did not affect cowpea stem and leaf digestibility.
- Taxon
- CowpeaVigna unguiculatat0
- Treatment
- plant populatione0
- Outcome
- In vitro dry matter digestibilitye0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In vitro dry matter digestibility (IVDMD) was >63% for both stems and leaves in all cultivars and was not affected by plant population.”
t0“Cowpea”
Claim · model-written summary
Cowpea leaf crude protein exceeded 20% for all treatments.
- Taxon
- CowpeaVigna unguiculatat0
- Organ / stage
- leavese0
- Outcome
- Crude proteine0
- Direction
- exceedede0
- Value
- 20%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Crude protein (CP) in leaves exceeded 20% for all treatments.”
t0“Cowpea”
Claim · model-written summary
Cowpea was recommended as high quality forage in Midwestern double cropping systems.
- Taxon
- cowpeaVigna unguiculatae0
- Outcome
- high-quality foragee0
- Setting
- midwestern United Statese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that cowpea has excellent potential for supplying high-quality forage from double-cropping systems in the midwestern United States.”
The same questions in other papers
density · quality: grain · Vigna unguiculata (cowpea)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- no effect
density · yield · Vigna unguiculata (cowpea)Positive and negative results
49 papers in the same direction as this paper · 13 in the opposite direction
- negative
- no effect
- negative
59 papers more in this group
See all 63 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.