Abstract
A field study was conducted to evaluate the effect of Acacia (Acacia albida) planted at three densities (100, 200 and 400 trees ha−1) and phosphorus fertilization (0, 20 and 40 kg P ha−1) on yield and water expense efficiency of rainfed cowpea (Vigna unguiculata) on a loamy sand soil. The interactive effects of tree density and phosphorus were non-significant. The yields of sole crop were at par with the 10×5 m spacing (200 trees ha−1) but significantly higher than that under 10×10 m (100 trees ha−1) and 5×5 m (400 trees ha−1). Phosphorus application had no significant effect on crop yield, though the yield with 20 kg P ha−1 was higher than the control. The water expense efficiency was maximum (3.71 kg ha−1 cm−1) in the sole crop which was thrice of that in 5×5 m spacing and twice of that in 10×5 m spacing. The results indicate that under arid conditions planting of A. albida at 10×5 cm spacing (200 trees ha−1) is optimum for agri-silviculture system.
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Claims 10
Claim · model-written summary
Tree density and phosphorus did not interact significantly.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- tree density and phosphoruse0
- Outcome
- interactive effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“The interactive effects of tree density and phosphorus were non-significant.”
Claim · model-written summary
Sole crop yield was at par with 10×5 m spacing.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sole crope0
- Outcome
- yieldse0
- Direction
- at pare0
- Comparator
- 10×5 m spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“The yields of sole crop were at par with the 10×5 m spacing (200 trees ha−1)”
Claim · model-written summary
Sole crop yield exceeded yield at 10×10 m spacing.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sole crope1
- Outcome
- highere0
- Direction
- highere0
- Comparator
- 10×10 me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“significantly higher than that under 10×10 m (100 trees ha−1)”
e1“The yields of sole crop were at par with the 10×5 m spacing (200 trees ha−1)”
Claim · model-written summary
Sole crop yield exceeded yield at 5×5 m spacing.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“significantly higher than that under 10×10 m (100 trees ha−1) and 5×5 m (400 trees ha−1)”
e1“The yields of sole crop were at par with the 10×5 m spacing (200 trees ha−1)”
Claim · model-written summary
Phosphorus application had no significant effect on crop yield.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- Phosphorus applicatione0
- Outcome
- crop yielde0
- Direction
- no significant effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“Phosphorus application had no significant effect on crop yield”
Claim · model-written summary
Yield at 20 kg P ha−1 exceeded the control without a stated significant difference.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- 20 kg P ha−1e0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“the yield with 20 kg P ha−1 was higher than the control”
Claim · model-written summary
Water expense efficiency was highest in sole crop at 3.71 kg ha−1 cm−1.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sole crope0
- Outcome
- water expense efficiencye0
- Direction
- maximume0
- Value
- 3.71 kg ha−1 cm−1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“The water expense efficiency was maximum (3.71 kg ha−1 cm−1) in the sole crop”
Claim · model-written summary
Sole crop water expense efficiency was three times that at 5×5 m spacing.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sole crope0
- Outcome
- thricee0
- Direction
- thricee0
- Comparator
- 5×5 m spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“in the sole crop which was thrice of that in 5×5 m spacing”
Claim · model-written summary
Sole crop water expense efficiency was twice that at 10×5 m spacing.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sole crope0
- Outcome
- twicee0
- Direction
- twicee0
- Comparator
- 10×5 m spacinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“in the sole crop which was thrice of that in 5×5 m spacing and twice of that in 10×5 m spacing”
Claim · model-written summary
The authors considered A. albida at 200 trees ha−1 optimal for arid agri-silviculture.
- Taxon
- cowpeaVigna unguiculatat0
- Outcome
- planting of A. albida at 10×5 cm spacing (200 trees ha−1) is optimume0
- Setting
- arid conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“rainfed cowpea”
e0“under arid conditions planting of A. albida at 10×5 cm spacing (200 trees ha−1) is optimum for agri-silviculture system”
The same questions in other papers
phosphorus · yield · Vigna unguiculata (cowpea)Results differ
5 papers in the same direction as this paper · 107 in the opposite direction
- positive
- positive
- positive
109 papers more in this group
See all 113 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.