The POLY4 cornerstones

Nutrient release profile

Impact on soil structure


POLY4 – a game-changing product

The POLY4 cornerstones

About polyhalite

POLY4 explained

Sirius Minerals polyhalite project development


Evaluation of polyhalite for its nutrient availability and accumulation in rice, sesame and peanut

POLY4 as a fertilizer for cotton in Virginia, USA

Effect of polyhalite on soil environments

Potato yield and dry matter response to different sources of potassium fertilizer in the UK

Response of tobacco to new fertilizer blends containing polyhalite in comparison to conventional blends in Tanzania

Response of wheat to polyhalite in Jiangsu, China


The added value of balanced fertilization with POLY4, European Mineral Fertilizer Summit, Netherlands - December 2017

We're about POLY4, IFA Crossroads Asia-Pacific Conference, Singapore - October 2017

Characteristic features of POLY4 as a multi-nutrient fertilizer, ASA Conference, Florida - October 2017

Effect of polyhalite and MOP as K sources on the yield and nutrient uptake of maize in Sichuan, China, ASA Conference, Florida - October 2017.pdf

POLY4 - a multi-nutrient fertilizer, Fertilizer Association of India Annual Summit - December 2017


Evaluation of polyhalite in comparison to muriate of potash for corn grain yield in the Southern Highlands of Tanzania, African Journal of Agronomy, International Scholars Journals – March 2017

Granulated polyhalite fertilizer caking propensity, Powder Technology – December 2016