Abstract
Abstract Low availability of phosphorus (P) and potassium (K) in acidic soil is a major constraint for crop production. Therefore, a field study was conducted to determine the effects of K and P on nodulation, productivity, and nutrient uptake of cowpea (Vigna unguiculata L. Walp) under rainfed conditions. The K and P were subjected to main and subplots, respectively with 100, 75, and 50% of fertilizer application. The growth and yield attributes were better using 100% K with 100% P. However, 100% K resulted in 20.9 and 16.9% greater green pod and stover yield than 50% K. Similarly, 100% P recorded 20.2 and 15.6% greater green pod and stover yield than 50% P. Uptake of nutrients such as nitrogen (N), P, and K followed the trend of greater to lower, 100% > 75% > 50%, in order for K and P. Similarly, nutrient-use efficiencies and production efficiency followed the trend of nutrient uptake. Keywords: Cowpeanodulationnutrient uptakephosphoruspotassiumyield
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Claims 7
Claim · model-written summary
Cowpea growth and yield attributes were better with full potassium and phosphorus application.
- Taxon
- cowpea
Vigna unguiculatae1 - Treatment
- 100% K with 100% Pe0
- Outcome
- growth and yield attributese0
- Direction
- bettere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth and yield attributes were better using 100% K with 100% P.”
e1“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Full potassium produced 20.9% greater cowpea green pod yield than half potassium.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- 100% Ke0
- Outcome
- green pode0
- Direction
- greatere0
- Value
- 20.9e0
- Comparator
- 50% Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100% K resulted in 20.9 and 16.9% greater green pod and stover yield than 50% K.”
e1“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Full potassium produced 16.9% greater cowpea stover yield than half potassium.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- 100% Ke0
- Outcome
- stover yielde0
- Direction
- greatere0
- Value
- 16.9%e0
- Comparator
- 50% Ke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100% K resulted in 20.9 and 16.9% greater green pod and stover yield than 50% K.”
e1“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Full phosphorus produced 20.2% greater cowpea green pod yield than half phosphorus.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- 100% Pe0
- Outcome
- green pode0
- Direction
- greatere0
- Value
- 20.2e0
- Comparator
- 50% Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100% P recorded 20.2 and 15.6% greater green pod and stover yield than 50% P.”
e1“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Full phosphorus produced 15.6% greater cowpea stover yield than half phosphorus.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- 100% Pe0
- Outcome
- stover yielde0
- Direction
- greatere0
- Value
- 15.6%e0
- Comparator
- 50% Pe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“100% P recorded 20.2 and 15.6% greater green pod and stover yield than 50% P.”
e1“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Cowpea nitrogen, phosphorus and potassium uptake ranked 100%, 75%, then 50% for potassium and phosphorus fertilizer applications.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- K and Pe0
- Outcome
- Uptake of nutrients such as nitrogen (N), P, and Ke0
- Direction
- greater to lowere0
- Comparator
- 75% > 50%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Uptake of nutrients such as nitrogen (N), P, and K followed the trend of greater to lower, 100% > 75% > 50%, in order for K and P.”
e1“cowpea (Vigna unguiculata L. Walp)”
Claim · model-written summary
Cowpea nutrient use and production efficiencies followed the same rate ranking as nutrient uptake.
- Taxon
- cowpeaVigna unguiculatae2
- Treatment
- K and Pe1
- Outcome
- nutrient-use efficiencies and production efficiencye0
- Comparator
- 75% > 50%e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Similarly, nutrient-use efficiencies and production efficiency followed the trend of nutrient uptake.”
e1“100% > 75% > 50%, in order for K and P.”
e2“cowpea (Vigna unguiculata L. Walp)”
The same questions in other papers
phosphorus · yield · Vigna unguiculata (cowpea)Results differ
106 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- negative
109 papers more in this group
See all 113 papers →potassium · yield · Vigna unguiculata (cowpea)Positive and negative results
31 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
29 papers more in this group
See all 33 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.