(plaintiff, environmental activist group, filed request under Public Information Act to obtain nutrient management plan records of particular farm; request denied by state (MD) department of agriculture; state ag department also denied second request for information on all MD confinement poultry operations; plaintiff then sued to obtain names of confinement poultry farm operators, nutrient records and enforcement records from prior three years; court denied request based on confidentiality of information contained in nutrient management plans; all information contained in nutrient management plan confidential indefinitely; plaintiff received free legal help in filing lawsuits against MD poultry operations by Univ. of MD Environmental Law Clinic; plaintiff ordered to pay court costs).