Sirius says polyhalite studies show improved soybean, corn yields
Fertiliser developer Sirius Minerals said ongoing trials of its polyhalite product on corn and soybean crops had produced positive results.
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The trials showed polyhalite improved soybean yield and bean protein yield by up to 16% over rival products muriate of potash (MOP) and sulphate of potash (SOP), Sirius said.
It added that corn fertilised with polyhalite improved yields by 3% over MOP and ammonium sulphate and returned $25 a hectare more than traditional yields.
Soybean trials were conducted at the US research university Texas A&M and Brazil’s University of Sao Paulo, with the corn study carried out at North Dakota State University.
Sirius said the trials demonstrate that polyhalite is “an effective fertiliser on both of these major crops and continue to underpin the value of balanced fertilisation”.
The company owns the York Potash Project in the UK, which has the world's largest and highest grade deposit of polyhalite, a multi-nutrient form of potash containing potassium, sulphur, magnesium and calcium.
Shares in the company were down 1.36% at 17.26p at 12.00 BST.