phosphorus · Yield · Vigna unguiculata (cowpea)

Cowpea (Vigna unguiculata (L) Walp.) Performance and yield as influenced by soil types and phosphorus fertilizer in two alfisols at Ado-Ekiti, south-West, Nigeria. · 1970

• positive
  Phosphorus application significantly affected cowpea number of branches, with a maximum of 15.4.
• positive
  Phosphorus application significantly affected cowpea dry matter yield, with a maximum of 32.4g plant-1.

Effects of Fertilizers on Harvest Time and Yield of Cowpeas (Vigna unguiculata) in Sierra Leone · 1973

• positive
  N, P and NP Mg fertilizers had very favourable effects on grain yields of cowpeas.

Effect of Phosphate Fertilization on Growth and Phosphorus Uptake in Cowpea for Green Manuring · 1974

• positive
  Green and dry matter production of cowpea increased with increasing phosphate level.

Effect of N, P, K fertilizers and lime on yield of crops grown in lateritic uplands · 1976

• positive
  P raised Dolichos seed yield with Ca to 897 kg.

  compared with no NP

• positive
  P raised Dolichos seed yield without Ca to 556 kg.

  compared with no NP

Effects of Phosphorus Nutrition and Light Intensity on Growth and Development of the Cowpea (Vigna unguiculata L.) · 1977

• positive
  Increasing phosphorus enhanced growth, blossom and fruit numbers, leaf number and area, and earlier flowering.

cited by 1 paper here

Effects of Pelleting Cowpea and Soyabean Seed with Fertilizer Dusts · 1979

• positive
  Molybdenum with rock phosphate improved cowpea growth and yield.

Effects of phosphorus nutrition on growth, fruit abscission and seed yield of the cowpea (Vigna unguiculata L.) · 1981

• positive
  Phosphorus increased New Era seed yield through greater dry matter diversion into seed.
• positive
  Phosphorus enhanced seed yield in Adzuki primarily through maintenance of functional pods.

cites 1 paper here

LAND USE EFFICIENCY, CANOPY DEVELOPMENT, DRY MATTER PRODUCTION AND PLANT NUTRITION OF CASSAVA-GRAIN LEGUME INTERCROPPING SYSTEMS · 1983

• positive
  Raising P application from zero to 44 kg ha('-1) increased cowpea seed yield in both years.

  compared with zero

Effect of Phosphate and Zinc application on dry matter yield and uptake of nutrients in Cowpea (Vigna unguiculata (L.) Walp.) · 1985

• positive
  Cowpea shoot and root dry matter and grain yields responded to P up to 80 ppm P.
• negative
  Higher P levels decreased cowpea yields.

  compared with 80 ppm P

RESPONSE OF COWPEA TO PHOSPHORUS APPLICATION UNDER RAINFED CONDITION · 1986

• positive
  Phosphorus applied at 20 kg/ha gave consistently higher grain yield than the control in both seasons in rainfed cowpea.

  compared with control

Phosphate Rock Fertilization in Tilled and No‐Till Low‐Input Systems in the Humid Tropics · 1988

• positive
  One application of 22 kg P ha‐' produced 85% of maximum cowpea yield for two years.

Greenhouse evaluation of phosphate fertilizers produced from Togo phosphate rock · 1991

• positive
  PAPR had 87.7% RAE relative to SSP for increased cowpea seed yield.

  compared with SSP

• positive
  Compacted PR plus TSP had 97.1% RAE relative to SSP for increased cowpea seed yield.

  compared with SSP

Effect of Rhizobium inoculation, nitrogen and phosphorus on growth and seedyield of cowpea (Vigna sinensis Savi) · 1996

• positive
  Phosphorus application at 90 kg P2O5/ha had a positive impact on increasing cowpea growth, seed yield and yield attributes.

EFFECTS OF INOCULUM SIZE AND PHOSPHORUS APPLICATION ON NODULATION AND N2 FIXATION IN COWPEA (VIGINA UNGUICULATA (L.) WALP) USING 15N METHODOLOGY. · 1997

• positive
  Phosphorus application significantly increased cowpea N yield only with inoculum above 103 cells/g soil.

Differences in response to phosphorus among cowpea (Vigna unguiculanta (l) walp.) cultivars · 1999

• positive
  Without P, TVU 1977 shoot yield was 65 percent of its maximum under P.

  compared with P applicationAbout lacking this nutrient, so it counts the other way round

• positive
  Without P, Accra market shoot yield was 75 percent of its maximum under P.

  compared with P applicationAbout lacking this nutrient, so it counts the other way round

EFFECT OF SOME SOURCES OF PHOSPHORUS FERTILIZER ON THE GROWTH AND YIELD OF COWPEA PLANT · 2000

• positive
  Super phosphate up to 300 kg/fed. significantly increased dry seed yield.

PHOSPHORUS FERTILIZATION AND FOLIAR SPRAY WITH “GREENZIT” ON COWPEA YIELD AND QUALITY · 2000

• positive
  number of branches increased significantly with 60 kg P2O5 / fed. and three Greenzit sprays in cowpea.
• positive
  total fresh yield increased significantly with 60 kg P2O5 / fed. and three Greenzit sprays in cowpea.
• positive
  dry seed yield increased significantly with 60 kg P2O5 / fed. and three Greenzit sprays in cowpea.
• positive
  average weight of 100 seeds increased significantly with 60 kg P2O5 / fed. and three Greenzit sprays in cowpea.
• positive
  early fresh yield increased significantly with 60 kg P2O5 / fed. and three Greenzit sprays in cowpea.

Response of vegetable cowpea to P, K and Rhizobium inoculation under Andaman condition · 2001

• positive
  The 80 kg P2O5, 120 kg K2O and 20 kg N/ha plus Rhizobium treatment gave the maximum green pod yield of 114.09 q/ha.
• positive
  The 80 kg P, 60 kg K and 20 kg N/ha plus Rhizobium treatment maximized pods per plant.

Integrated phosphorus management in maize (Zea mays)-sunflower (Helianthus annuus)-cowpea (Vigna unguiculata) fodder cropping system · 2001

• positive
  Single superphosphate with microbial inoculants and 75% recommended P2O5 increased growth and yield of cowpea fodder.

Effect of nitrogen, phosphorus and cutting management on fodder yield of cowpea (Vigna unguiculuta) · 2001

• positive
  The 20:40 nitrogen and phosphorus level gave highest green fodder and dry matter yields.

  compared with other fertilizer combina-

Effect of nitrogen, phosphorus and seed inoculation on cowpea (Vigna unguiculata) · 2001

• positive
  Increasing phosphorus up to 90 kg P,O Jha significantly increased cowpea seed yield.

Effect of preceding crops and fertility levels on wheat (Triticum aestivum) in light-textured soil · 2003

• positive
  The 120 kg N plus 60 kg P2O5 treatment applied to wheat had a significant residual effect on grain and straw yields of succeeding pearlmillet, clusterbean, and cowpea compared with no NP application.

  compared with no NP application

• positive
  FYM with 90 kg N plus 45 kg P2O5 applied to wheat had a significant residual effect on grain and straw yields of succeeding pearlmillet, clusterbean, and cowpea compared with no NP application.

  compared with no NP application

Phosphate rock biofertiliser with Acidithiobacillus and rhizobia improves nodulation and yield of cowpea (Vigna unguiculata) in greenhouse and field conditions · 2006

• positive
  TSP and biofertiliser increased cowpea dry matter yield.
• positive
  TSP and biofertiliser increased cowpea grain yield.

Phosphorus Level Affects Brown Blotch Disease, Development and Yield of Cowpea · 2006

• positive
  Increasing phosphorus significantly increased seeds per pod, leaf area and yield.

cited by 1 paper here

Effects of application of phosphorus fertilizer on brown blotch disease of cowpea · 2006

• positive
  Increasing phosphorus raised seeds per pod, leaf area and yield.

cited by 1 paper here

Utilization of phosphorus from different sources by genotypes of promiscuous soybean and cowpea in a low-phosphorus savanna soil · 2007

• positive
  Ca-P, Fe-P and TSP significantly increased shoot dry matter yield and P accumulation in most cowpea genotypes.

  compared with control

• no effect
  Al-P addition did not significantly affect cowpea shoot yield and P accumulation.

  compared with control

Effects of phosphate rock application on dry matter yield and phosphorus recovery of maize and cowpea grown in sequence · 2010

• positive
  Phosphate application significantly enhanced dry matter yields of maize and cowpea.
• positive
  SSP increased cowpea yields to 3.28, 4.04 and 3.36 g per plant.

Influence of phosphorus on the performance of cowpea (Vigna unguiculata (L) Walp.) varieties in the Sudan savanna of Nigeria · 2011

• positive
  Applied phosphorus significantly improved stover yield in cowpea, with the highest response at 60 kg.P.ha–1.
• positive
  Applied phosphorus significantly improved pods per plant in cowpea, with the highest response at 60 kg.P.ha–1.
• positive
  Applied phosphorus significantly improved 100-seed weight in cowpea, with the highest response at 60 kg.P.ha–1.
• positive
  Applied phosphorus significantly improved grain in cowpea, with the highest response at 60 kg.P.ha–1.

cited by 11 papers here

INOCULAÇÃO E ADUBAÇÃO MINERAL NA CULTURA DO FEIJÃO - CAUPI EM LATOSSOLOS DA AMAZÔNIA ORIENTAL · 2011

• positive
  Phosphorus and potassium fertilization significantly increased cowpea yield.

Effect of inorganic and bio-fertilizers on productivity and nutrients uptake in cowpea [Vigna Unguiculata (L.) Walp] · 2012

• positive
  Combined fertilizer and Rhizobium plus PSB increased seed yield to 8.85qha-1.

  compared with the control

• positive
  Combined fertilizer and Rhizobium plus PSB increased pods per plant to 8.23.

  compared with the control

• positive
  Combined fertilizer and Rhizobium plus PSB increased seeds per pod to 7.83.

  compared with the control

• positive
  Combined fertilizer and Rhizobium plus PSB increased straw yield to 19.20q ha-1.

  compared with the control

cited by 1 paper here

Response of cowpea lines to low Phosphorus tolerance and response to external application of P · 2012

• positive
  Phosphorus application significantly increased grain and fodder yields at both locations.

Effect of Aspergillus sp. as a bioinoculant in vermicompost with special reference to phosphate enrichment. · 2012

• positive
  Phosphate solubilizing fungal vermicompost increased cowpea productivity.

YIELD AND NUTRIENT UPTAKE BY COWPEA (Vigna sinensis) AS INFLUENCED BY INTEGRATED USE OF SEWAGE SLUDGE AND CROP RESIDUE IN A TYPIC HAPLUSTEPT · 2013

• positive
  NPK and organic sources significantly increased cowpea yield over control.

  compared with control

Nodulation Productivity and Nutrient Uptake of Cowpea (Vigna unguiculataL. Walp) with Phosphorus and Potassium under Rainfed Conditions · 2013

• positive
  Full phosphorus produced 15.6% greater cowpea stover yield than half phosphorus.

  compared with 50% P

Nutrient Budgeting, Economics and Energetics of Cowpea under Potassium and Phosphorus Management · 2014

• positive
  Full P raised stover yield 16.6% over half P.

  compared with 50% P

Phosphorus Fertilization on the Nutrition and Yield of Cowpea Grown in an Arenosols · 2014

• positive
  Phosphorus rates increased cowpea grain yield.

Influence of Seed Rate and Fertilizer Levels on Dry Matter Distribution and Dry Matter Yield of Fodder Cowpea (cv. Swad) · 2014

• positive
  A fertilizer level of 25 kg N and 50 kg P2O5 ha−1 gave significantly higher dry matter yield of 5.35 t ha−1.

Influence of seed rate and fertilizer levels on nutrient content. Uptake and soil fertility status in fodder cowpea production · 2014

• positive
  A combination of 50 kg seeds/ha with 25 kg N and 50 kg P2O5/ha gave higher green forage yield (39.72 t/ha) than other combinations.

  compared with other treatment combinations

• positive
  The combination of 50 kg seeds/ha with 25 kg N and 50 kg P2O5/ha gave higher dry matter yield (5.52 t/ha) than other combinations.

  compared with other treatment combinations

• positive
  A fertilizer level of 25 kg N and 50 kg P2O5/ha gave higher dry matter yield (5.35 t/ha) in fodder cowpea.
• positive
  A fertilizer level of 25 kg N and 50 kg P2O5/ha gave higher green forage yield (38.04 t/ha) in fodder cowpea.

Yield attributes and quality of cowpea as influenced by nitrogen and phosphorus levels on medium black soil of Gujarat · 2014

• positive
  Phosphorus at 80 kg/ha gave the maximum and significantly higher seed, straw and biological yields of cowpea than the control, at par with 40 and 60 kg P2O5/ha.

  compared with control

• positive
  Combined application of nitrogen and phosphorus at 20 and 40 kg P2O5/ha gave significantly higher seed and straw yield of cowpea than the rest of the treatments.

  compared with rest of the treatments

Breeding for tolerance of cowpea to low phosphorus soil conditions through physiological and genetic studies · 2014

• positive
  All varieties increased root production under low P relative to normal P.

  compared with normal P treatments

Growth and yield of cowpea as influenced by nitrogen and phosphorus levels on medium black soils of Gujarat · 2015

• positive
  Nitrogen and phosphorus at 40 and 80 kg/ha gave maximum, significantly higher plant height, dry matter and branch number versus control.

  compared with control

• positive
  The same fertilizer rates maximized seed and stover yield.

  compared with control

• positive
  Combined 20 kg N and 40 kg P2O5/ha significantly improved seed and stover yield over other treatments.

  compared with rest of the treatments

Effect of Phosphorus and Zinc Application on Nutritional Characteristics of Fodder Cowpea ( Vigna unguiculata ) · 2015

• positive
  Applying 60 kg/ha phosphorus yielded 27.64 t/ha of fodder cowpea, 55.6% above no phosphorus application.

  compared with no phosphorus application

• positive
  Applying 60 kg/ha phosphorus yielded 27.64 t/ha of fodder cowpea, 7.50% above 40 kg/ha phosphorus.

  compared with 40 kg/ha

Effect of phosphorus and zinc nutrition on growth and yield of fodder cowpea · 2016

• positive
  At 60 kg/ha phosphorus, fodder yield was 27.64 t/ha, 7.50% above 40 kg/ha.

  compared with 40 kg/ha

• positive
  At 60 kg/ha phosphorus, fodder yield was 55.6% above no phosphorus.

  compared with no phosphorus application

• positive
  The 60 kg/ha P2O5 application improved growth traits.
• negative
  Yield declined above the combination of 60 kg/ha P2O5 and 20 kg/ha ZnSO4.

cited by 1 paper here

Effects of Phosphorus and Rhizobium Inoculation on Yield Components and Grain Yield of Some Selected Cowpea Genotypes · 2016

• positive
  Phosphorus application significantly influenced fodder and grain yield, with better results at 40 kg P2O5 ha-1
• positive
  Phosphorus application significantly influenced pods per plant and pod weight, with better results at 40 kg P2O5 ha-1

cites 1 paper here

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

• positive
  Phosphorus alone consistently increased cowpea grain yield across locations.
• positive
  Combined inoculant and phosphorus increased cowpea grain yield to 1674 kg ha-1, versus 1097 kg ha-1 for control.

  compared with non-inoculated control

cites 1 paper herecited by 5 papers here

Effects of Two Types of Fertilizer and Arbuscular Mycorrhiza on Damping off Disease (Macrophomina phaseolina) of Cowpea (Vigna uniguiculata L. Walp) · 2017

• positive
  Cowpea treated with 676 kg/ha single super phosphate produced higher cumulative weight of harvested fruits per plant.

Effects of seed biopriming under different levels of nitrogen and phosphorus on crop growth and nodulation of cowpea (Vigna unguiculata) · 2017

• positive
  T6 recorded significantly higher number of branches plant-1 at 7.1.

Effect of soil salinity, phosphorus and biofertilizers on physical properties of soil, yield attributes and yield of cowpea [Vigna unguiculata (L.) Wilczek] · 2017

• positive
  PROM gave maximum significantly higher yield components and root mass.

  compared with rest of the treatments

Effects of Rhizobium, PSB Inoculation and Phosphorus Management on Soil Nutrient Status and Performance of Cowpea in Acid Soil of Arunachal Pradesh, India · 2017

• positive
  Dual inoculation with P2O5 fertilizer gave 34 % better pod yield than dual inoculation without phosphatic fertilizer.

  compared with duel inoculation without phosphatic fertilizer

• positive
  Dual inoculation with P2O5 fertilizer significantly increased yield attributes and green pod yield of cowpea.

Evaluation of New Cultivars of Fodder Cowpea in Terms of Growth Attributes and Seed Yield as Influenced by Various Doses and Varieties · 2017

• positive
  Interaction of variety and phosphorus level significantly increased seed and fodder yields of cowpea.
• positive
  Phosphorus at 80 kg P2O5/ha significantly increased green fodder yield, 288.39 q/ha, compared with a lower phosphorus level.

  compared with lower level of phosphorus fertilization

• positive
  Seed yield of cowpea was enhanced only up to 60 kg P2O5/ha.
• negative
  Seed yield of cowpea was reduced at 80 kg P2O5/ha.

Effect of rates and sources of soluble phosphorus on the behavior of cowpea plants inoculated with rhizobacteria from soils of the north region of Brazil · 2017

• positive
  Single superphosphate produced higher production of shoot dry matter than thermophosphate in cowpea.

  compared with thermophosphate

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

• positive
  At BUK, 40 kg/ha P2O5 gave the highest cowpea grain yield.
• no effect
  Phosphorus had no significant effect on cowpea grain yield at Bagauda.

cites 1 paper here

Integrated Effect of Foliar Fertilization of Fe, Zn and Rates of P Fertilization on Growth and Yield of Cowpea · 2017

• positive
  P fertilisation significantly increased seed yield of cowpea.
• positive
  P fertilisation significantly increased yield components of cowpea.

COWPEA RESPONSE TO PHOSPHORUS AND ZINC · 2018

• positive
  For cultivar BRS Guariba, maximum grain yield was 1,376 kg ha-1, obtained at 118 kg P2O5 ha-1 and 0.9 kg zinc ha-1.
• positive
  For cultivar BRS Aracê, maximum grain yield was 2,165 kg ha-1, obtained at 120 kg P2O5 ha-1 and 3.1 kg zinc ha-1.

cited by 1 paper here

Impacts of Residual Phosphorus on the Production of Cowpea in the Cerrado Region · 2018

• positive
  A predecessor-crop phosphorus dose of 80 kg·ha-1 of P2O5 produced higher cowpea grain yield of 393.44 Mg·ha-1.
• positive
  A predecessor-crop phosphorus dose of 80 kg·ha-1 of P2O5 produced a greater profit margin of US $326.26.

Response of Grain Legumes to Phosphorus Application in the Guinea Savanna Agro‐Ecological Zones of Ghana · 2018

• positive
  Phosphorus fertilizer increased cowpea grain yield by 296 kg ha −1 on average.
• positive
  Across two seasons, phosphorus fertilizer increased cowpea yield by 9.85 per kg ha −1 kg −1 P applied.

cites 1 paper herecited by 1 paper here

Integrated nutrient management in intercropping system of Cenchrus and cowpea under semi-arid condition of Rajasthan · 2018

• positive
  Maximum economic return of Cenchrus and cowpea was obtained with 40 kg N + 60 kg P2O5 + bacterial inoculation, at Rs99695/ha.
• positive
  Applying 40 kg N + 60 kg P2O5 + bacterial inoculation significantly increased economic return of Cenchrus and cowpea compared with other treatments.

  compared with other treatments

Cowpea nutrient responses for Malawi and Tanzania · 2018

• positive
  In Tanzania, the cowpea yield response to applied P was linear, with 21 kg of grain yield increase per kg of P applied.

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

• positive
  Increasing phosphorus doses increased grain production per plant of cowpea.
• positive
  Increasing phosphorus doses increased pod number per plant, grain number per pod and one-hundred-grain weight of cowpea.
• positive
  The phosphorus dose of 183.1 kg P2O5 gave the maximum technical grain yield of cowpea, estimated at 2,023.3 kg.

cites 1 paper here

Cowpea response to nutrient application in Burkina Faso and Niger · 2018

• positive
  Phosphorus application increased yield with curvilinear to plateau or linear responses.
• positive
  Applying 22.5 kg per hectare phosphorus increased overall mean grain yield by 0.35 Mg per hectare and 47%.

Integrated Nutrient Management in Summer Cowpea (Vigna unguiculata L.) Under South Gujarat Condition · 2018

• positive
  The higher nutrient and inoculation treatments significantly increased cowpea yield components and yields.

  compared with 50 % RDF (F1), FYM @ 0 t ha-1 (O1) and No inoculation (B1)

• positive
  The three higher nutrient and inoculation treatments significantly increased cowpea growth traits compared with their lower counterparts.

  compared with 50 % RDF (F1), FYM @ 0 t ha-1 (O1) and No inoculation (B1)

Soil Microbial Population As Influenced By Direct and Residual Effect of Organic and Inorganic Sources of Nutrients in Cowpea- Little Millet Cropping Sequence · 2019

• positive
  60 kg P2O5 ha-1 raised cowpea pod yield.

Efficiency in the use of phosphorus by cowpea genotypes · 2019

• positive
  Increasing P levels increased number of seeds per pod, number of pods per plant and productivity in cowpea genotypes

Influence of Phosphorus forms on Growth and Yield of Cowpea, Kales and Amaranth Vegetable Species · 2019

• positive
  TSP gave the highest branch number, 40.67.

Enriched sources of plant nutrients and different levels of phosphorus on sustained cowpea production in Typic Haplusterts soil · 2019

• positive
  150% P2O5 enriched pressmud gave higher pod yield.
• positive
  100% P2O5 enriched pressmud significantly improved pod yield.

Effect of organic manures and phosphorus on cowpea and their residual effect on succeeding little millet · 2019

• positive
  Among phosphorus levels in cowpea, 60 kg P2O5 ha-1 gave higher pod yield.

  compared with phosphorus levels

Effect of Organic and Inorganic Nutrient Sources on Growth, Yield, Nutrient Uptake and Economics of Fodder Cowpea [Vigna unguiculata (L.) Walp.] · 2020

• positive
  T6 produced significantly higher green matter yield (334.5 q ha-1) in fodder cowpea or postharvest soil.

Effect of weed management and phosphorus nutrition on yield of cowpea [Vigna unguiculata (L.) Walp.] · 2020

• positive
  40 kg phosphorus significantly increased cowpea yield attributes and yield relative to 30 kg.

  compared with 30 kg P2O5 ha-1

Phosphorus Fertilizer Rating and Rhizobia Inoculation for Improved Productivity of Cowpea in Northern Uganda · 2020

• positive
  Inoculation and phosphorus fertilizer increased yield of both cowpea varieties.

cited by 1 paper here

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

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

cites 1 paper here

Combined Application of Inoculant, Phosphorus and Potassium Enhances Cowpea Yield in Savanna Soils · 2020

• positive
  The same inoculant and fertilizer treatment gave the highest grain yield on Ferric Luvisol, without differing from the BR-40-20 treatment.

  compared with BR-40-20 kg ha−1 P2O5 and K2O

• positive
  The inoculant with 30 kg P2O5 and 20 kg K2O gave the highest grain yield on Ferric Lixisol, 1.68 tons ha−1.

  compared with BR-40-30 kg ha−1 P2O5 and K2O ha−1

cites 1 paper here

Second-crop cowpea under residual phosphorus doses in the Brazilian Amazon · 2020

• positive
  The highest cowpea grain yield after soybean harvest was 1,256 kg ha-1 at 200 kg ha-1 P2O5.
• positive
  The highest cowpea grain yield after rice harvest was 885 kg ha-1 at 200 kg ha-1 P2O5.

Quality and economics of cowpea as influenced by genotypes, phosphorus levels and liquid based PSB · 2021

• positive
  75 kg P2O5 ha-1 plus liquid PSB produced a higher B:C ratio than other phosphorus levels, at 2.27.

  compared with other phosphorus levels

Effect of biofertilizers and phosphorus on growth parameters and yield of Cowpea (Vigna unguiculata (L.) Walp.) in sandy loam soil of Prayagraj · 2021

• positive
  The treatment gave seed yield of 2.62 t/ha, a significant increase.
• positive
  The treatment gave 100-seed weight of 8.02 g, a significant increase.
• positive
  The treatment gave 4.87 branches, a significant increase.
• positive
  The treatment gave biological yield of 9.07 t/ha, a significant increase.

Effect of nitrogen starter dose and phosphorus fertilizer application on growth, yield characters and grain crude protein content of three varieties of cowpea in anyigba, kogi state, Nigeria · 2021

• positive
  The highest grain yield of cowpea, 0.93 t/ha, was obtained with 10 kg N and 37.5 kg P2O5/ha.
• positive
  Nitrogen and phosphorus application significantly increased growth, some yield attributes and final grain yield of three cowpea varieties.

Bradyrhizobium japonicum AND PHOSPHORUS FERTILIZATION ON Vigna Unguilata (L.) WALP · 2021

• positive
  113.42 kg ha−1 P2O5 gave 1,124 kg ha−1 yield in the first period, an 83% increase.

Productivity of Phosphorus Fertilization in Cowpea-Maize Strip Intercropping under Rainfed Conditions · 2021

• positive
  P levels significantly enhanced profit and benefit cost ratio of cowpea.
• positive
  P levels significantly enhanced grain yield and land equivalent ratio of cowpea.

cites 1 paper here

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

• positive
  Phosphorus at 90 kg ha-1 gave the highest pod length (14.33 cm)
• positive
  Phosphorus at 90 kg ha-1 gave the highest seed length (0.70 cm)
• positive
  Phosphorus at 90 kg ha-1 gave the highest grain yield (0.34 t ha-1)

cites 1 paper here

Influence of Varieties and Integrated Nutrient Management Practices on Growth and Yield of Seed in Cowpea (Vigna unguiculata L.) · 2021

• positive
  The specified highest nitrogen nutrient regime gave the highest growth and seed yield parameters.

cites 1 paper here

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

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

cites 2 papers here

Growth and production of cowpea cultivated with liming and nitrogen fertilization in the Eastern Amazon · 2021

• positive
  Cowpea growth and production responded to liming and P and K mineral fertilization.

Effects of Conservation Tillage, Phosphorus and Variety on Selected Soil Physical Properties and Cowpea Productivity at Minna in Nigeria’s Southern Guinea Savanna · 2021

• positive
  Applying 60 kg P2O5 ha-1 raised cowpea grain yield by 135% over the untreated control.

  compared with untreated control

• positive
  Applying 60 kg P2O5 ha-1 raised cowpea haulm yield by 120% over the untreated control.

  compared with untreated control

Effect of Phosphorus and Zinc Nutrition on Fodder Yield and economics of Cowpea (Vigna unguiculata L. walp) · 2022

• positive
  The same combination gave the greatest dry matter yield (74. 14 q per ha) of cowpea.
• positive
  The combination of 70 kg P2O5 and 25 kg ZnSO4 per ha gave the greatest green fodder yield (365.13 q per ha) of cowpea.
• positive
  The 70 kg P2O5 and 25 kg ZnSO4 per ha treatment gave the highest net returns (61277.50 INR per ha).
• positive
  The 70 kg P2O5 and 25 kg ZnSO4 per ha treatment gave the highest gross returns (91282.07 INR per ha).
• positive
  The 70 kg P2O5 and 25 kg ZnSO4 per ha treatment gave the highest benefit cost ratio (2.04).

Effect of Sowing Window and Phosphorus Levels on Growth and Yield of Summer Fodder Cowpea · 2022

• positive
  Application of 60 kg P2O5 per ha significantly improved growth, yield attributes and yield of fodder cowpea

  compared with control conditions (0 kg P2O5 ha-1)

The Effect of Phosphorus and Molybdenum on Growth and Yield of Cowpea (Vigna unguiculata L.) · 2023

• positive
  Treatment 9 gave the maximum gross return (94954.8 INR/ha) compared with other treatments.

  compared with other treatments

• positive
  Treatment 8 increased harvest index to 49.05%.
• positive
  Treatment 8 (P 50 kg/ha + Mo 1.5 kg/ha) increased seed yield to 1550.27 kg/ha.
• positive
  Treatment 9 gave a higher net return (65670.3 INR/ha) compared with other treatments.

  compared with other treatments

• positive
  Treatment 8 increased stover yield to 1615.50 kg/ha.
• positive
  Treatment 9 gave the highest benefit cost ratio (2.24) compared with other treatments.

  compared with other treatments

• positive
  Treatment 9 gave the maximum number of pods per plant (15.10).
• positive
  Treatment 9 increased seed index to 16.03 g.
• positive
  Treatment 9 gave the maximum number of seeds per pod (14.67).

Impact of Phosphorus Levels and Spacing on Growth, Yield and Development of Cowpea (Vigna unguiculata L. Walp.) · 2023

• positive
  The 50 kg/ha phosphorus and 30 cm spacing treatment had the highest seed yield (1.05 t/ha).

  compared with other treatments

• positive
  The 50 kg/ha phosphorus and 30 cm spacing treatment had the highest net returns (57,832.40 INR/ha).

  compared with other treatments

• positive
  The 50 kg/ha phosphorus and 30 cm spacing treatment had the highest stover yield (1.60 t/ha).

  compared with other treatments

• positive
  The 50 kg/ha phosphorus and 30 cm spacing treatment had the highest number of branches/plant (7.40).

  compared with other treatments

• positive
  The 50 kg/ha phosphorus and 30 cm spacing treatment had the highest gross returns (89,050.00 INR/ha).

  compared with other treatments

• positive
  The 50 kg/ha phosphorus and 30 cm spacing treatment had the highest benefit cost ratio (1.85).

  compared with other treatments

• positive
  The 50 kg/ha phosphorus and 30 cm spacing treatment had the highest number of seeds/pod (10.87).

  compared with other treatments

• positive
  The 50 kg/ha phosphorus and 30 cm spacing treatment had the highest number of pods/plant (15.07).

  compared with other treatments

cited by 2 papers here

Influence of Phosphorus and Gibberelic Acid on Growth and Yield of Cowpea (Vigna unguiculata L.) · 2023

• positive
  The 60 kg/ha phosphorus and 150 ppm gibberelic acid treatment gave the highest net return.

  compared with control

• positive
  The 60 kg/ha phosphorus and 150 ppm gibberelic acid treatment gave the highest seed yield.

  compared with control

• positive
  The 60 kg/ha phosphorus and 150 ppm gibberelic acid treatment gave the highest harvest index.

  compared with control

• positive
  The 60 kg/ha phosphorus and 150 ppm gibberelic acid treatment gave the highest benefit cost ratio.

  compared with control

• positive
  The 60 kg/ha phosphorus and 150 ppm gibberelic acid treatment gave the highest stover yield.

  compared with control

• positive
  The 60 kg/ha phosphorus and 150 ppm gibberelic acid treatment gave the highest gross return.

  compared with control

• positive
  The 60 kg/ha phosphorus and 150 ppm gibberelic acid treatment gave the highest number of pods/plant.

  compared with control

Economic Analysis of Seed Inoculation and Phosphorus Doses Application in Cowpea (Vigna unguiculata L.) · 2023

• positive
  A phosphorus dose of 40 kg P2O5 ha-1 gave maximum economic returns among doses.

  compared with other phosphorus doses

cites 1 paper here

Effect of Phosphorus Fertilizer Application on Yields of Cowpea (Vigna unguiculata) Varieties across Sites of Differing Soil Fertility in western Kenya · 2023

• positive
  Phosphorus application produced an insignificant increase in cowpea grain yield across varieties.

Effect of Foliar Nutrition on Yield, Quality, Nutrient Content and Uptake of Kharif Cowpea · 2023

• positive
  Foliar urea plus urea phosphate gave significantly higher yield (1422 kg/ha).

  compared with 75% of RDF + 2% spray of NPK 19:19:19 at 15 and 30 DAS

Effect of Seed Treatment and Phosphorus Levels on Growth, Yield and Economics of Cowpea (Vigna unguiculata L.) · 2023

• positive
  Combined inoculation without phosphorus yielded higher gross returns, net returns and B:C ratio.

cites 1 paper here

Growth Analysis and Response Studies in Cowpea [Vigna unguiculata (l.) Walp] under the Influence of PROM and Phosphatic Inoculants · 2023

• positive
  PROM equivalent to 60 kg P2O5/ha improved cowpea dry matter accumulation at 50 DAS and at harvest over lower levels.

  compared with lower levels

• positive
  PROM equivalent to 40 kg P2O5/ha improved cowpea dry matter accumulation at 25 DAS over preceding levels.

  compared with preceding levels

• positive
  PROM equivalent to 60 kg P2O5/ha improved cowpea CGR during 25 - 50 DAS and 50 DAS – at harvest over lower levels.

  compared with lower levels

Influence of Phosphorus and Foliar Application of Iron and Zinc on Growth and yield of Cowpea (Vigna unguiculata L.) · 2023

• positive
  Treatment 9 produced higher seed yield (1.25 t/ha) than other treatments.

  compared with different treatments

• positive
  Treatment 9 produced higher gross return (79,219.00 ₹/ha) than other treatments.

  compared with different treatments

• positive
  Treatment 9 produced higher net return (54,092.46 ₹/ha) than other treatments.

  compared with different treatments

• positive
  Treatment 9 produced higher number of pods/plant (14.76) than other treatments.

  compared with different treatments

• positive
  Treatment 9 produced maximum B:C ratio (2.15) than other treatments.

  compared with different treatments

• positive
  Treatment 9 produced higher number of seeds/pod (10.52) than other treatments.

  compared with different treatments

• positive
  Treatment 9 produced higher stover yield (2.81 kg/ha) than other treatments.

  compared with different treatments

Effect of different levels of phosphorus and sulphur on growth and yield of cowpea (Vigna sinensis) Cv. Pusa Phalguni · 2023

• positive
  The reported phosphorus treatment produced 13.56 branches.
• positive
  The reported phosphorus treatment gave green pod yield of 5o.51q per hectare.

Growth and Productivity of Cowpea (Vigna unguiculata L.) in Response to Seed Priming and Different Levels of Phosphorus · 2023

• positive
  Priming combined with 40 kg P2O5 ha-1 yielded the highest cowpea grain yield of 1.51 t ha-1.
• positive
  Application of 40 kg P2O5 ha-1 produced the highest cowpea grain yield of 1.44 t ha-1.

cites 1 paper here

Effect of Phosphorus Rates on Growth, Phosphorus (P) Uptake and Yield of Cowpea (Vigna unguiculata L.) Varieties at Dabo Hana District, South West Ethiopia · 2024

• positive
  Sewunet with 69 kg P2O5 ha-1 produced the highest straw yield, 12,164 kg ha-1.
• positive
  Sewunet with 69 kg P2O5 ha-1 produced the highest grain yield, 2582.89kg ha-1.

cites 1 paper here

Effect of Spacing and Different Levels of Phosphorus on Growth and Yield of Malepatan‐1 Variety of Cowpea (Vigna unguiculata (Linn.) Walp.) in Dang District, Nepal · 2024

• positive
  The 60 kg/ha P level gave the highest fresh pod yield, 1.05 t/ha.
• positive
  Phosphorus had a significant effect on pod length at 85 and 100 DAS.
• positive
  The 40 kg/ha P level gave the highest number of pods per plant at 100 DAS, 8.3, comparable to the 60 kg/ha level (8.1).

  compared with a P level of 60 kg/ha

• positive
  Phosphorus had a significant effect on the yield of fresh pods.
• positive
  Pod length at 100 DAS was highest at the 60 kg/ha P level, 21.16 cm.
• positive
  Phosphorus had a significant effect on the number of pods per plant at 100 DAS.
• positive
  Pod length at 85 DAS was highest at the 60 kg/ha P level, 20.33 cm.
• no effect
  Phosphorus did not significantly affect plant height or the number of pods per plant at 70 and 85 DAS.

cites 5 papers here

A new phosphorus fertilizer blend enhances grain legume yield and profitability in northern part of Ghana · 2024

• positive
  P-fertilizer blends increased grain yield of cowpea varieties in the Northern and Upper West regions.
• no effect
  P-fertilizer blends did not increase grain yield of cowpea varieties in the Upper East region.

cites 2 papers here

Effect of bio-fertilizer and phosphorus on growth and yield of cowpea · 2024

• positive
  The treatment raised cowpea harvest index to 34.27%.
• positive
  The treatment gave 34.33 pods per cowpea plant.
• positive
  The treatment gave 8.87 branches per cowpea plant.
• positive
  The treatment gave 10.73 seeds per cowpea pod.
• positive
  The treatment raised cowpea stover yield to 2.97 t/ha.
• positive
  The treatment raised cowpea grain yield to 1.55 t/ha.

Response of vermicompost and inorganic fertilizers on physic-chemical properties of soil, growth and yield attributes of cowpea (Vigna unguiculata L.) var. ganga kanchan · 2024

• positive
  Combined N, P, K at 50% with vermicompost at 100% was equally effective for growth and yield of cowpea variety Ganga Kanchan under Prayagraj conditions.

Impact of Seed Priming Techniques and Varying Phosphorus Fertilization Levels on the Growth and Yield of Cowpea (Vigna unguiculata L.) · 2025

• positive
  Combining seed priming with 40 kg P2O5 per ha produced the highest grain yield, 1.51 t/ha.
• positive
  The highest grain yield, 1.44 t/ha, was achieved at 40 kg P2O5 per ha in the IT97K-499-35 cowpea variety.

Impact of Phosphorus and Plant Growth Substances on the Agronomic Traits of Cowpea (Vigna unguiculata L.) · 2025

• positive
  Phosphorus at 40 kg/ha with brassinolide at 50 ppm gave the highest stover yield (3388.63 kg/ha).
• positive
  Phosphorus at 40 kg/ha with brassinolide at 50 ppm gave the highest number of seeds per pod (10.9).
• positive
  Phosphorus at 40 kg/ha with brassinolide at 50 ppm gave the highest seed yield (1248.49 kg/ha).
• positive
  Phosphorus at 40 kg/ha with brassinolide at 50 ppm gave the highest number of pods per plant (17.5).

Phosphorus Dynamics under Saline Water Irrigation and Phosphorus Fertilization in Cowpea · 2025

• positive
  Normal irrigation water and 30 mg kg-1 phosphorus increased plant height, pods per plant, and seeds per pod.
• positive
  Normal irrigation water and 30 mg kg-1 phosphorus increased seed index and seed and straw yield.

Nutrient Management on Forage Yield and Quality in Fodder Cowpea · 2025

• positive
  Application of 60 kg P₂O₅ and 25 kg ZnSO₄ per hectare significantly improved yield.

EFFECT OF BIO-FERTILIZERS AND PHOSPHORUS ON GROWTH AND YIELD OF ZAID COWPEA (VIGNA UNGUICULATA L.) · 2025

• positive
  Application of PSB with 40 kg/ha phosphorus (Treatment 8) recorded higher number of branches per plant (23.21) in zaid cowpea.
• positive
  Application of PSB with 40 kg/ha phosphorus (Treatment 8) recorded higher net return (56402.9INR/ha) in zaid cowpea.
• positive
  Application of PSB with 40 kg/ha phosphorus (Treatment 8) recorded higher B:C ratio (2.83) in zaid cowpea.
• positive
  Application of PSB with 40 kg/ha phosphorus (Treatment 8) recorded higher seed yield (819.32 kg/ha) in zaid cowpea.
• positive
  Application of PSB with 40 kg/ha phosphorus (Treatment 8) recorded maximum gross return (76363.76INR/ha) in zaid cowpea.
• positive
  Application of PSB with 40 kg/ha phosphorus (Treatment 8) recorded higher number of pods per plant (5.00) in zaid cowpea.
• positive
  Application of PSB with 40 kg/ha phosphorus (Treatment 8) recorded higher stover yield (1312.48 kg/ha) in zaid cowpea.
• no effect
  Application of PSB with 40 kg/ha phosphorus showed no significant change in number of seeds per pod (11.67) in zaid cowpea.
• no effect
  Application of PSB with 40 kg/ha phosphorus showed no significant change in harvest index (41.67) in zaid cowpea.
• no effect
  Application of PSB with 40 kg/ha phosphorus showed no significant change in seed index (13.13) in zaid cowpea.

INFLUENCE OF ORGANIC, PHOSPHATE FERTILIZATION AND SPRAYING OF L-GLUTAMIC ACID ON GROWTH AND YIELD OF COWPEA · 2026

• positive
  The combined treatment produced the maximum pod and branch numbers.
• positive
  The combined treatment produced maximum green pod yield.

Response of Different Phosphorus Levels on Growth and Yield of Different Vegetable Cowpea [Vigna unguiculata (L.) Walp] Under Semi-arid Conditions of Rajasthan, India · 2026

• positive
  Phosphorus 40 kg/ha with Kashi Kanchan significantly improved green pod yield per hectare.
• positive
  Phosphorus at 40 kg/ha gave maximum green pod yield per plant.
• positive
  Phosphorus 40 kg/ha with Kashi Kanchan significantly improved green pod length and yield per plant.
• positive
  Phosphorus at 40 kg/ha gave maximum green pods per plant.
• positive
  Phosphorus at 40 kg/ha gave maximum green pod yield per hectare.
• positive
  Phosphorus at 40 kg/ha gave maximum branches per plant.
• positive
  Phosphorus at 40 kg/ha gave maximum green pod length.
• positive
  Phosphorus at 40 kg/ha gave maximum green pod weight.