Immigrants Glimpse Greener Acres; A Back-to-the-Country Program For Farmers in a New Country
Immigrants with farming experience tour Orange County, NY, farms on trip organized by Greenmarket, which runs farmers' markets through Council on Environment of New York City; many communities ask for markets but there are not enough farms to supply them; Greenmarket director Tony Mannetta says effort has focused on land preservation but opportunity for preservation of human resources is equally important; immigrants are given information about how to get started and available loan programs for renting or purchasing farmland; photo (M)