Shares of the major fertilizer companies finished mixed on Tuesday. Intrepid Potash ( IPI) closed at $18.45, up 63 cents or 3.54%. On Friday, UBS initiated coverage of four fertilizer companies, rating Intrepid a buy with a price target of $27. UBS also started coverage of Mosaic with a buy rating and price target of $63. Mosaic closed Tuesday at $41.98, down 76 cents or 1.78%. UBS also started coverage of Terra Industries ( TRA) and CF Holdings ( CF) at neutral. Terra closed at $28.09, up 81 cents or 3% Tuesday; CF finished at $71.13, up 74 cents or 1.05%. Jud Pyle of TheStreet.com took a look at call-spread selling in Monsanto ( MON) and Potash ( POT). Monsanto closed at $83.10, up 34 cents or 0.41%; Potash finished at $80.81, down 98 cents or 1.20%. Scotts Miracle Gro ( SMG) finished the day at $34.70, up 15 cents or 0.43%.