PotashCorp Board of Directors Rejects BHP Billiton's Unsolicited Offer

Deems US$130 Per Share Offer Wholly Inadequate- Urges Shareholders Not to Tender Their Shares

Potash Corporation of Saskatchewan Inc. ("PotashCorp") today announced that its Board of Directors, after careful consideration with the assistance of its independent financial and legal advisors, voted unanimously to reject the unsolicited offer by BHP Billiton Development 2 (Canada) Limited, an indirect wholly-owned subsidiary of BHP Billiton Plc (LSE:BLT/JSE:BIL/NYSE:BBL) ("BHP Billiton"), to acquire all of the outstanding shares of PotashCorp for US$130 per share in cash. The Board unanimously recommends that PotashCorp shareholders reject the BHP Billiton offer and not tender their shares.

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PotashCorp's Board of Directors Rejects BHP Billiton's Unsolicited, Non-Binding Proposal as Grossly Inadequate

Potash Corporation of Saskatchewan Inc. ("PotashCorp") today announced that its Board of Directors has received and unanimously rejected an unsolicited proposal from BHP Billiton Limited (ASX: BHP ; LSE: BLT ; NYSE: BHP ; "BHP Billiton") to enter into a transaction under which BHP Billiton would acquire PotashCorp for US$130 per share in cash. PotashCorp's Board of Directors thoroughly reviewed BHP Billiton's unsolicited proposal with the assistance of its independent financial and legal advisors and concluded that the proposal is grossly inadequate and it is not in the best interests of its shareholders for PotashCorp to enter into discussions with BHP Billiton.

"The PotashCorp Board of Directors unanimously believes that the BHP Billiton proposal substantially undervalues PotashCorp and fails to reflect both the value of our premier position in a strategically vital industry and our unparalleled future growth prospects," said PotashCorp Chairman Dallas J. Howe.

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PotashCorp Reports Second-Quarter Earnings of $1.55 Per Share

Potash Corporation of Saskatchewan Inc. (PotashCorp) today reported second-quarter earnings of $1.55 per share(1) ($472.0 million), more than double the $0.61 per share ($186.2 million) earned in the same period last year. This result was the second-highest second-quarter total in company history and raised first-half 2010 earnings to $3.02 per share ($921.2 million). Our performance for the quarter reflected the continuing recovery in fertilizer demand and was enhanced by a $69.6 million special dividend (equivalent to approximately $0.17 per share) from our investment in Israel Chemicals Ltd. (ICL) in Israel.

Second-quarter gross margin of $583.6 million, driven largely by potash, was more than triple the $169.1 million earned in the same period last year and raised total gross margin for the first six months to $1.3 billion.

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Western Potash Corp. Upgrades Measured and Indicated Potash Resource to 174 Million Tonnes

Western Potash Corp. (the "Company") (TSX.V: WPX, FSE: AHE) is pleased to announce the receipt of an NI 43-101 compliant Mineral Resource Estimate for its Milestone property in southern Saskatchewan. This updated resource estimate significantly upgrades the Milestone potash resource, which consists of 41 million tonnes of Measured Resource (contained KCl), 133 million tonnes of Indicated Resource, and 560 million tonnes of Inferred Resource. The resource estimate at Milestone was prepared by Agapito Associates Inc. ("AAI") of Grand Junction, Colorado.

AAI has extensive experience in solution mining, resource characterization and preparation of 43-101 Technical Reports on Potash Resources. AAI's experience includes work for Intrepid Potash Inc in the US, Rio Tinto and Vale at the PRC project in Argentina and for several prospective potash projects located in Saskatchewan.

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Rodinia Minerals Inc. (TSX-V: RM)(OTCQX: RDNAF) Defines 2.5 km by 4 km High-Grade Lithium-Potash Zone Near Surface at Salar De Diablillos Through Auger Drilling

Toronto, Ontario - May 26, 2010 (Investorideas.com Mining stocks Newswire) - Rodinia Minerals Inc. ("Rodinia" or the "Company") (TSX-V: RM; OTCQX: RDNAF) announces completed phase II sample results from its auger drill exploration program on its Salar de Diablillos lithium-brine project in Salta, Argentina ("Diablillos" or the "Salar") (See Press Releases dated March 1, 2010 and April 20, 2010).

 Based on the completed sampling program of 102 sample holes, the Diablillos auger drill exploration program returned lithium ("Li") values of up to 1,000 milligrams per litre ("mg/L") and potassium ("K") values of up to 11,000 mg/L.

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