Combined GAJ, urea, and potassium sulphate promoted grapevine growth parameters.

potassium sulfate · growth · VitisPositive and negative results

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

1. no effect
   Potassium sulfate and potassium dihydrogen phosphate had no significant biomass effect.

   Effects of Different Types of Potassium Fertilizers on Nutrient Uptake by Grapevine · 2023

   Opposite direction

2. positive
   T8 had the highest girth of fruiting shoots.

   EFFECT OF SALICYLIC ACID AND POTASSIUM SULPHATE ON GROWTH AND YIELD GRAPES CV. 2A CLONE · 2024

   Same direction

nitrogen · growth · VitisPositive and negative results

16 papers in the same direction as this claim · 3 in the opposite direction · 1 reporting no difference from an alternative

1. no effect
   Shoot growth did not differ significantly under short-term nitrogen deficiency.

   A New Strategy to Improve Vineyard Resilience: Grapevine Morphological Adaptation to Short-Term Nitrogen Deficiency · 2022

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

2. no effect
   Increasing soil-applied nitrogen up to 134.4 kg/ha had no effect on growth or cropping of Concord.

   Root Pruning Has Little Effect on Seyval, Catawba or Concord Grapevines · 2001

   Opposite direction

3. negative
   Vine growth in the ammonium series decreased at pH 4 and 5 compared with pH 6, 7 and 8.

   Nutritional and physiological studies on grapevine. IV · 1961 · compared with pH 6, 7, and 8

   Opposite direction

4. no effect
   Grape pollen stored in liquid nitrogen showed no significant decrease in germination after 64 weeks.

   Cryogenic preservation of grape (Vitis vinifera L.) pollen · 2015 · compared with pollen stored under laboratory conditions

   No difference from an alternative

5. positive
   High nitrogen stimulated shoot growth and leaf area expansion.

   Interaction of Nitrogen Availability During Bloom and Light Intensity During Veraison. I. Effects on Grapevine Growth, Fruit Development, and Ripening · 1998

   Same direction

6. positive
   High soil nitrogen increased leaf area through lateral shoot growth.

   Soil nitrogen utilisation for growth and gas exchange by grapevines in response to nitrogen supply and rootstock · 2001

   Same direction

7. positive
   Low N before veraison favoured fruit development at the expense of root growth.

   Carbon and nitrogen partitioning in either fruiting or non-fruiting grapevines: effects of nitrogen limitation before and after veraison · 2002

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

8. positive
   Single berries were bigger in size and weight under high N.

   Effect of nitrogen and potassium fertilization on productivity and fruit quality of ‘crimson seedless’ grape · 2011

   Same direction

12 papers more in this group