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Potash News

The Potash Development Association publishes both technical Potash News items and shorter Blog items. Potash News provides the latest up to date information on Potash and its use, while blog items are shorter and more timely.

If you are in the UK or Ireland and are interested in receiving Potash News items through the post free of charge, then sign up on the contact page. Recipients of the Potash News can receive CPD points for BASIS, NRoSO, and Dairy Pro.

Potassium and pest pressure

Barley yellow dwarf virus is the most economically important virus in UK cereals, with severe infections causing losses of up to 60% in winter wheat and 50% in winter barley. Although this is rare, significant economic damage can occur from small populations of aphids carrying the virus. The effects of BYDV can also be exacerbated […]

October 2020

Potash for OSR

Oilseed rape is going through a tough period at the moment, rapidly falling out of favour on-farm due to difficulties with establishment following the loss of neonicotinoid seed treatments in 2014. On top of this it has also faced increasing challenges with Clubroot, Turnip Yellows Virus, erucic acid levels and weed control. However, despite these […]

August 2020

Record rainfall impacts soil nutrient levels

It will probably come as no surprise that the high level of rainfall seen over winter throughout most parts of the UK has resulted in lower soil nutrient levels when analysed.

July 2020

Potash for grass

Many farmers are not getting the best from their grassland because of a lack of potash. Any green material removed from fields also removes large quantities of potash which will need replacing to ensure grass productivity is maintained.

June 2020

Crop stress responses

It has been stressed many times about the importance of potassium in crops suffering from drought stress, and each spring appears to provide a reminder of this.

May 2020

Legumes need a good K-start!

Potassium is an essential nutrient for legumes as it is for all crops. It is an activator for many enzymes, especially those involved in protein synthesis and has an important role in maintaining water balance in the plant. In legumes, potassium is necessary for the proper development and functioning of root nodules. In legumes, rhizobia […]

May 2020

Crop root systems explain need to maintain K Index level

When considering the appropriate soil K Index for a crop or rotation it is important to take into account that different crops have root systems with different total lengths, depths and efficiencies. Generally speaking, the longer an annual crop is growing, the longer the root system, which means that winter combinable crops and grass etc, should have […]

March 2020

Recent trends in UK potash fertiliser use

The latest Professional Agricultural Analysis Group (PAAG) UK soil analysis data suggest that 33% of fields (including both arable and grassland) are below index 2- for potassium. These soils will require an application of K to replace what has been removed by the crop during the season and an additional amount to build up the […]

December 2019

Potash implications of baling straw

Last harvest there were quite a lot of last-minute decisions to bale as a result of anticipated straw shortages and higher prices. Baling and removing straw, where there is no specific requirement for other enterprises on the farm, can often be a sensible agronomic and economic decision. These include high level of residue on the […]

September 2019

To bale or not to bale…

With harvest having started in several counties across the country, decisions will be being made whether to bale straw or chop and incorporate back into the soil. Many winter barley crops that have not suffered from the dry conditions up to June generally have a large amount of straw. Last year there was quite a […]

July 2019

Potash for maize

Following the recent heavy rainfall, some spring sown crops will have quickly gone from a state of moisture stress to waterlogging, not ideal in the early stages of production! Some of the later sown spring crops, such as maize have been slow to get going due to the dry soil conditions. The rainfall will help […]

June 2019

Potassium for the soil and crop: the importance of getting it right

Patrick J. Forrestal1, Mark Plunkett1, Cathal Redmond1 and Martin Bourke21Soils, Land Use and Environment Dept. Teagasc, Johnstown Castle, Co. Wexford.2Teagasc Advisory Service, Tinnahealy, Co. Wicklow Introduction Crops including spring barley require high levels of potassium (K) to support yield, often at similar levels to nitrogen (N). Potassium has traditionally received much less focus compared with […]

May 2019

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