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​EPSO Top® – Cost-effective foliar magnesium and sulphur

EPSO Top® is a quick acting magnesium and sulphur fertiliser for foliar application. The nutrients are fully water-soluble and are present in the sulphate form (MgSO4 × 7 H2O).

EPSO Top® dissolves rapidly and without residue in water and is therefore perfectly suited to foliar application with a sprayer and also for fertigation through irrigation systems.

EPSO Top® can be used as a supplement to soil application in particular if magnesium deficiency is observed and during periods of peak demand.

EPSO Top® is approved according to regulation (EC) 834/2007 and (EC) 889/2008 for use in organic farming systems.

Magnesium
  • is essential for yield and quality formation of plants
  • plays a primary role in the efficiency of photosynthesis as the central atom in chlorophyll (pigment needed for leaf greening)
  • is necessary in energy, protein and carbohydrate metabolism for the incorporation and storing of assimilates
  • Mg-deficiency often occurs during the peak growing phase of the crops. These temporary magnesium deficiency situations can be overcome quickly and successfully with a foliar application of EPSO Top®​

Sulphur
  • has become increasingly important for yield and quality due to the decrease in atmospheric sulphur deposition
  • is absorbed by plants via the root system and leaves in sulphate form
  • is a vital nutrient needed for protein synthesis and improves the plants ability to efficiently utilise the available nitrogen

application

​Cereals
  • Two critical phases during cereal growth determine the application timing of EPSO Top®. Visible magnesium deficiency symptoms often occur at the start of tillering. Another critical phase is during grain filling and ripening.
  • A high magnesium and sulphur content is essential to keep the flag leaf green thus ensuring continued photosynthesis.  
Oilseed rape
  • Brassica crops are known for their susceptibility to Mg and S deficiency.
  • EPSO Top® should be repeatedly applied as a foliar spray from stem extension to the flowering stage in order to meet the magnesium and sulphur requirement of the plants.  
Sugar beet
  • A foliar application with EPSO Top® at row closure secures the yield as well as the quality formation of the beet
  • The primary effect is that with an EPSO Top® application, the nitrogen metabolism can proceed optimally; therefore, resulting in improved quality and yield.  
Potatoes
  • When flowering and tuber initiation stages co-incide, the potato plant requires the highest magnesium and sulphur concentrations.
  • The supply via the leaf keeps the photosynthesis rate constant with the result that during the tuber formation phase no deficiency situation occurs.  
Hops
  • The EPSO Top® application is carried out together with the crop protection treatments shortly before or at flowering and is repeated during the burr stage (3-4 weeks post-flowering) as during this period the Mg and S requirement is at its peak.  
Asparagus
  • The green asparagus fern is responsible for developing the reserve assimilates for the coming spring and thus determines the yield for the following year.
  • Magnesium deficiency quickly results in yellowing and decaying of the asparagus fern and consequently shortens the storage phase of reserve assimilates. One or two treatments with EPSO Top® can counteract this effect. Application rate: 50kg EPSO Top® ha-1 annually.
  • Because of the relatively small green mass of asparagus the EPSO Top® concentration could be increased up to approx. 10% (10kg EPSO Top 100l-1 water).  
Softwood
  • Christmas trees and spruce show often discolorations on their needles. During growth the discolorations change from bright green to yellow up to brown – typically for magnesium deficiency. To reduce deficiencies a repeat application program is recommended to achieve an intensive green and blue needle colouration. 

EPSO Top® can be used universally for all crops and is suitable for all soil types.

recommendation

  • EPSO Top® is generally applied as a 5% solution (approx. 5kg product per 100l of water). This concentration can generally be applied in combination with crop protection products.
  • Generally EPSO Top® should be applied at a total annual rate of 25kg ha-1 and, in case of lower water volumes, a repeated application is recommended.
  • In the case of severe deficiency and/or visible deficiency symptoms the application rate should be increased up to 50kg ha-1 applied in 2 to 4 split applications.
  • EPSO Top® is compatible with most pesticides and liquid fertilisers. The instructions of the respective producers must be considered.
  • EPSO Top® can also be applied in an aqueous solution with other liquid fertilisers, ammonium nitrate-urea solutions as well as NP or urea solutions. For this purpose, EPSO Top® also has to be first dissolved in water.

Crop: Timing of Application / Concentration​​​

​Cereals: Growth stage 30-71 tillering to flowering / 5%*
Oilseed rape: From stem extension to bud development / 5%
Peas, beans: Pre-flowering / 5%
Potatoes: Combined with fungicide program / 3-5%
​​Beet: At row closure / 5%
Fruits: At fruit set, with scab treatment, repeatedly / 2-3%
Hops: 2 to 3 times until flowering / 2-5%
Vines: Until early August, 1 to 2 times / 2-5%
Vegetables: Combined with fungicide/insecticide treatment / 2-5%
​Conifers: Repeatedly in the case of yellowing or browning / 2-5%
​
Greenhouses: With drip irrigation / 2-5%
​EPSO Top® is mined from natural salt deposits in Europe which were formed by the evaporation of seawater many millions of years ago.

Due to its natural origin and the minimal processing in our fertiliser factories EPSO Top® is suitable for organic farming according to regulation (EC) 834/2007 and (EC) 889/2008. EPSO Top® has also been certified by the Soil Association (UK) for use in organic farming systems.