Foliar application of water-soluble macro and micro nutrient fertilizers significantly improved dry matter production, number of pods per plant and pod weight compared with RDF alone.

micronutrient · yield · Vigna unguiculata (cowpea)Positive and negative results

1 paper in the same direction as this claim · 2 in the opposite direction

1. no effect
   Micronutrient application had no significant effect on cowpea yield or its components.

   Effect of agrolyser on the yield of cowpea in Zuru, Kebbi State Northwestern Nigeria · 2006

   Opposite direction

2. no effect
   Mg and trace elements applied by seed soaking did not influence the grain yield of cowpea.

   Etude du comportement au champ et des performances de cinq variétés de niébé sous apport d'éléments traces à Yangambi (Zaïre) · 1986

   Opposite direction

3. positive
   The first sowing date combined with foliar application at 80 DAS produced the highest number of pods per plant, 23.92.

   Effects of Sowing Date and Biological Fertilizer Foliar on Yield and Yield Components of Cowpea · 2013

   Same direction

application · yield · Vigna unguiculata (cowpea)Positive and negative results

111 papers in the same direction as this claim · 12 in the opposite direction · 2 reporting no difference from an alternative

1. positive
   125 % RDF plus 2 % DAP spray increased green pod yield to 17.40 t /ha versus 100 % RDF in vegetable cowpea.

   Effect of foliar spray and fertilizer levels on growth and yield of vegetable cowpea [Vigna unguiculata (L.) Walp.] · 2019 · compared with 100 % RDF

   Same directionCited by this paper

2. no effect
   The DDT-related decrease in flower number and shorter flowering had no detrimental effect on cowpea yield.

   Relationships of Insect Control Attempts by Chemicals to Components of Yield of Cowpeas in Uganda · 1972

   Opposite direction

3. no effect
   Foliar 6-benzyladenine sprays had no significant effect on cowpea yield compared with controls.

   Effects of Decapitation and Benzyladenine on Growth and Yield of Cowpea [Vigna unguiculata (L.) Walp.] · 1984 · compared with controls

   Opposite direction

4. negative
   Spraying at flowering caused the greatest reduction in haulm yields.

   On‐farm evaluation of control strategies for insect pests in cowpea with emphasis on flower thrips,Megalurothrips sjostedtiTrybom (Thysanoptera: Thripidae) · 1992

   Opposite direction

5. no effect
   Drenching with vermicompost teas did not affect growth and yield of cowpea in two field trials.

   Effects of vermicompost water extract prepared from bamboo and kudzu against Meloidogyne incognita and Rotylenchulus reniformis · 2018

   Opposite direction

6. no effect
   Foliar selenate did not affect cowpea grain yield.

   Agronomic biofortification of cowpea with selenium by foliar fertilization: effect of doses in three cultivars · 2019

   Opposite direction

7. no effect
   Grain yield was similar between monitored and calendar cypermethrin sprays on cowpea.

   Management of major field insect pests and yield of cowpea (Vigna unguiculata (L) Walp) under calendar and monitored application of synthetic chemicals in Asaba, southern Nigeria. · 2010 · compared with calendar

   Opposite direction

8. negative
   Longer soaking of cowpea seeds (1 to 6 hours) lowered germinability, sprout yield ratio and lateral root output.

   The Yield and Growth Responses of Cowpea Sprouts According to the Treatment Conditions of Raw Seeds · 2013

   Opposite direction

117 papers more in this group

fertilization · yield · Vigna unguiculata (cowpea)Positive and negative results

274 papers in the same direction as this claim · 15 in the opposite direction · 2 reporting no difference from an alternative

1. positive
   125 % RDF plus 2 % DAP spray increased green pod yield to 17.40 t /ha versus 100 % RDF in vegetable cowpea.

   Effect of foliar spray and fertilizer levels on growth and yield of vegetable cowpea [Vigna unguiculata (L.) Walp.] · 2019 · compared with 100 % RDF

   Same directionCited by this paper

2. no effect
   Baglog compost mixed with cow manure had no significant effect on stem diameter, pod number and pod length.

   Respon Pemberian Campuran Kompos Baglog Dengan Pupuk Kandang Sapi dan Pupuk Organik Cair (POC) Limbah Cair Pabrik Kelapa Sawit Terhadap Pertumbuhan dan Produksi Tanaman Kacang Panjang (Vigna sinensis L.). · 2020

   Opposite direction

3. negative
   62 Mg ha−1 manure decreased cowpea grain and biomass yield.

   Cattle manure and intercropping effects on soil properties and growth and yield of pearl millet and cowpea in Namibia · 2019

   Opposite direction

4. no effect
   Phosphorus application had no significant effect on cowpea growth and yield.

   Effect of nitrogen and phosphorus fertilizer application on growth and yield performance of cowpea in Ghana · 2017

   Opposite direction

5. no effect
   Residual KCl fertilization did not affect cowpea grain yield.

   Sistemas de manejo e efeito residual do potássio na produtividade e nutrição do feijão-caupi · 2014

   Opposite direction

6. no effect
   Adding fertilizer N to inoculated cowpeas did not increase seed yield.

   Interaction Between Rhizobial Inoculation and Fertilizer Nitrogen in Five Cowpea Cultivars · 1986

   Opposite direction

7. no effect
   Grain yield did not differ among seven rhizobia inoculations, mineral nitrogen fertilization and controls.

   Strategies for Improving Cowpea Grain Yield in the Eastern Amazon: Biological Nitrogen Fixation, Phosphorus Nutrition, and Molybdenum Seed Enrichment · 2023 · compared with the control (without inoculation and N fertilization)

   Opposite direction

8. no effect
   Fertilizer treatments did not significantly affect harvest time of cowpeas.

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

   Opposite direction

283 papers more in this group