In 1982, Agnes Denes planted two acres of golden wheat just two blocks from Wall Street and the former World Trade Center. Why? To point out inequities in land use, to protest environmental damage, to question human values. The “installation” was called Wheatfield—A Confrontation: Battery Park Landfill, Downtown Manhattan. In 1996, Denes completed Tree Mountain in Ylöjärvi, Finland, a virgin fir forest of 11,000 trees planted in a mathematical pattern related to the Golden Ratio. Ranging back 50 years to her emergence in the 1960s and 70s, this retrospective presents 150 of Denes’ mixed-media works, her own evolution traced step by step. —E.C.