Junior sulfate of potash developer SOPerior Fertilizer Corp., Toronto, said Aug. 24 that it has entered into a letter of intent (LOI) with an arm’s length party to form a joint venture to develop its Blawn Mountain Mining Lease in Utah. Initially, the two jv parties will have an equal 50-50 interest, but the counter-party will have the right to earn additional ownership interests as it successfully achieves a series of milestones.