Potash in Fibrophos

Potash is an important nutrient for grass, especially where the whole crop is removed by silage and hay cuts. Potash is essential for grass yield.

The potash removed in a crop is in proportion to the yield, e.g. 27 units/acre of potash are removed in each tonne of grain and straw; 40 units/acre of potash are removed in each tonne of hay. (Ref PDA - Phosphate & Potash removal by crops) Link to PDA

Fibrophos not only replaces the potash removed but also replenishes the soil with important secondary elements and most of the trace elements vital to crop growth and the well being of grazing animals. 

As the potash in Fibrophos is less soluble than inorganic fertilisers (50 per cent water soluble), the uptake of potash is less rapid, avoiding luxury uptake that can cause staggers.

ADAS trials carried out by ETSU for the DTI confirmed
 that the potash is very quickly available and is as effective as muriate of potash. Any potash remaining will become available to the plants in the longer term, making Fibrophos a very effective fertiliser for grass and arable situations. Because the potash is available in line with crop growth demands, plants become healthier and stronger.

Since these early trials conducted in 1994 over 250,000t of Fibrophos has been sold nationwide for both cereal and grassland applications. Many of the sales made today are to farmers who have used Fibrophos across their farms for the past 7 years - thus endorsing the work carried out by ADAS.

  • Potash index should be 2 for adequate growth

  • If indices are under 2, then larger amounts of potash should be applied to replace and improve index over a period of years.

  • Grass yield increases of 65% have been shown on soil K index 0. 
    (28% on soil index 1).

  • Light land requires more potash than heavy land.

  • Low potash reduces grain yield, quality and vigour.

  • Potash in potatoes is the most important nutrient affecting quality, tuber size, dry matter, storage and drought and disease resistance.

  • Setaside crops will remove some potash which can be a problem on low K soils.

[ Home ] [ What is Fibrophos ] [ Specification ] [ Phosphate ] [ Potash ] [ Secondary ] [ Trace ] [ Grassland ] [ Arable ] [ Spreading ] [ How to Buy ] [ Contact ]