Iron chelates in fertilizer will correct iron deficiency when added to soil. One pound of iron per acre is the recommended rate. An application of iron will only work if the soil is acidic in nature, so a pH test is required.
On Location. Big was filmed on location in New Jersey and New York City. The Baskin House was filmed at, 437 Greenmount Road, Cliffside Park, NJ, USA [Thanks to Dee83] Locations used include Cliffside Park, NJ for young Josh's home and Cliffside Park Elementary School #6 as the school Tom Hanks attended.
This site is at the corner of 13th Street and Third Avenue in the East Village, looking west. The big shootout at the end of the film takes place in a tenement about 5 doors east of here at 226 East 13th Street. Here's Travis (Robert DeNiro) with Jodi Foster (Iris Steensma) and one of her friends from the street.