MCFARLAND <MCFE> TO BUY PETROMINERALS <PTRO> McFarland Energy Inc said its board and that of Petrominerals Corp have approved a definitive agreement for McFarland to acquire Petrominerals in an exchange of stock. McFarland said it would exchange one common share for each 5.4 Petrominerals shares. McFarland said former holders of Petrominerals will have a 25 pct interest in the combined company. The merger is still subject to approval by shareholders of both companies.