Applied phosphorus significantly improved pods per plant in cowpea, with the highest response at 60 kg.P.ha–1.

phosphorus · yield · Vigna unguiculata (cowpea)Results differ

106 papers in the same direction as this claim · 5 in the opposite direction · 1 reporting no difference from an alternative

1. no effect
   Phosphorus level had no significant effect on stem girth, plant height or 100 seed weight.

   Effect of different phosphorus levels on four cowpea (Vigna unguiculata Walp L.) varieties for grain and fodder yield in Upper East Region of Ghana · 2019

   Opposite directionCites this paper

2. no effect
   Phosphorus fertilizer and row spacing did not significantly influence grain number per pod.

   Responses of Cowpea to Phosphorous Application Rates and Row Spacing in the Sudan Savanna Zone of Nigeria · 2020

   Opposite directionCites this paper

3. positive
   Phosphorus alone consistently increased cowpea grain yield across locations.

   Growth and Yield Responses of Cowpea to Inoculation and Phosphorus Fertilization in Different Environments · 2017

   Same directionCites this paper

4. positive
   CPE 40 with recommended fertilizer gave maximum growth and yield under plentiful water.

   Response of Summer Cowpea to Growth, Yield and Water Use Efficiency under different Irrigation and Nutrient Management in Lower Indo-Gangetic Plains · 2020

   Same directionCites this paper

5. positive
   At BUK, 40 kg/ha P2O5 gave the highest cowpea grain yield.

   RESPONSE OF COWPEA (Vigna unguiculata L.Walp) VARIETIES TO PHOSPHORUS LEVELS IN SUDAN SAVANNA OF NIGERIA · 2017

   Same directionCites this paper

6. positive
   Increasing phosphorus doses increased pod number per plant, grain number per pod and one-hundred-grain weight of cowpea.

   Morphophysiological biometry and grain production in cowpea under different phosphorus levels · 2018

   Same directionCites this paper

7. positive
   Phosphorus application significantly increased seed weight per pod in both years except Iron bean in 2015.

   Effect of phosphorus application on the performance of some cowpea lines · 2021

   Same directionCites this paper

8. positive
   Phosphorus at 90 kg ha-1 gave the highest pod length (14.33 cm)

   Growth and Yield of Cowpea as Influenced by Different Phosphorus Levels · 2021

   Same directionCites this paper

104 papers more in this group