Urea, diammonium, potassium sulfate and magnesium sulfate fertilizers increased sunflower production by 47.7%, reaching 2 530 kg/hm2.

magnesium sulfate · yield · Helianthus annuus (common sunflower)Results agree

2 papers in the same direction as this claim

1. positive
   The same magnesium sulphate dose was effective for sunflower production quality and quantity.

   INTEGRATIVE EFFECT OF MAGNESIUM SULPHATE ON THE GROWTH OF FLOWERS AND GRAIN YIELD OF PADDY: A CHEMIST'S PERSPECTIVE · 2013

   Same direction

2. positive
   Combined foliar boron, magnesium sulfate and fungicide increased sunflower seed yield by 11,8 centner/hectares.

   EFFICIENCY OF THE USE OF MAGNESIUM SULFATE IN SUNFLOWER CROPS · 2022 · compared with background of N126P60K210

   Same direction

potassium · yield · Helianthus annuus (common sunflower)Positive and negative results

47 papers in the same direction as this claim · 3 in the opposite direction

1. no effect
   Under salinity, potassium did not markedly change dry matter production.

   Physiological response of sunflower seedlings to salinity and potassium supply · 1999

   Opposite direction

2. no effect
   Potassium rates had little effect on sunflower yield increase.

   Yield Response of Sunflower to Sowing Dates and NPK Rates under Zero Tillage in Wet Soil of Southwestern Coastal Bangladesh · 2020

   Opposite direction

3. no effect
   Potassium did not affect production traits.

   Yield of sunflower affected by NPK fertilizer and available soil water content · 2014

   Opposite direction

4. positive
   Sunflower plants with higher potassium levels had higher yield and higher dry matter allocation to grain filling (harvest index).

   Effect of Potassium Levels on Antioxidant Enzymes and Malondialdehyde Content under Drought Stress in Sunflower (Helianthus annuus L.) · 2010

   Same direction

5. positive
   Under saline conditions, foliar potassium salts improved sunflower achene yield and 100-achene weight.

   Growth and photosynthesis of salt‐stressed sunflower (Helianthus annuus) plants as affected by foliar‐applied different potassium salts · 2009

   Same direction

6. positive
   Potash produced superior biomass and seed yield in sunflower.

   Evaluation of the influence of nitrogen fixing, phosphate solubilizing and potash mobilizing biofertilizers on growth, yield, and fatty acid constituents of oil in peanut and sunflower · 2012

   Same direction

7. positive
   Si and K application gave a significant improvement in plant growth and yield of salt-stressed sunflower.

   Silicon and Potassium Nutrition Enhances Salt Adaptation Capability of Sunflower by Improving Plant Water Status and Membrane Stability · 2015 · compared with salt-stressed plants without supplemental Si and K

   Same direction

8. positive
   K omission was among the most limiting to sunflower dry matter production.

   NUTRITIONAL DISORDERS BY DEFICIENCY IN SUNFLOWER var. CATISSOL-01 DESORDENS NUTRICIONAIS POR DEFICIÊNCIA EM GIRASSOL var. CATISSOL-01 · 2007

   Same directionAbout lacking this nutrient, so it counts the other way round

42 papers more in this group

nitrogen · yield · Helianthus annuus (common sunflower)Positive and negative results

181 papers in the same direction as this claim · 10 in the opposite direction · 4 reporting no difference from an alternative

1. negative
   The relative energy cost of one achene rose one to twenty-fourfold with greater density and lower nitrogen.

   Regulatory Mechanisms of Reproductive Effort in Plants 1. Plasticity in Reproductive Energy Allocation and Propagule Output of Helianthus annuus L. (Compositae) Cultivated at Varying Densities and Nitrogen Levels · 1986

   Opposite direction

2. no effect
   N did not significantly affect yield at sites with higher chlorophyll readings.

   Sunflower Response to Nitrogen and Phosphorus in Wheat‐Fallow Cropping Systems · 1997

   Opposite direction

3. negative
   The 60 kg N ha−1 dose alone yielded significantly less.

   Effect of Varying Nitrogen and Micronutrient Fertilization on Yield Quantity and Quality of Sunflower (Helianthus annuus L.) Achenes · 2022

   Opposite direction

4. negative
   N rates of 180-210 kg ha−1 decreased sunflower seed yield by 2%-5%.

   Early sowing increases nitrogen use efficiency of sunflower in wet clay soils · 2023

   Opposite direction

5. negative
   Glufosinate ammonium and ametryn herbicides reflected in losses of sunflower dry weight biomass and crop yield.

   Control of volunteer soybean plants in sunflower crop1 · 2015

   Opposite direction

6. no effect
   Side-dressing with urea had no effect on sunflower yield.

   Potential for sunflower to use residual soil water in the dry season after maize in North-West Cambodia · 2014

   Opposite direction

7. no effect
   Nitrogen input had no significant effect on sunflower growth or seed yield.

   IRRIGATION AND N-FERTILIZATION EFFECTS ON THE GROWTH AND PRODUCTIVITY OF SUNFLOWER IN AN AQUIC SOIL IN CENTRAL GREECE · 2007

   Opposite direction

8. no effect
   Urea application had no effect on growth attributes and grain yield of sunflower.

   Effect of Seedbed Preparation and Nitrogen Fertilizer on the Performance of a Sunflower (Helianthus annuus L.) Hybrid under Rain-fed Conditions · 2013

   Opposite direction

187 papers more in this group