Gov. William Donald Schaefer has designated April as "Tree-mendous Earth Month" and is asking all citizens to help plant 1 million trees this year.

Volunteers from Anne Arundel County, including the Boy Scouts, the Coast Guard and the Emmanuel Lutheran Church of Riviera Beach, are among the groups helping with the project. But more volunteers are needed.

In one effort, the Linde Division of Union Carbide Corp. of New Jersey has brought to the county its 1-year-old nationwide Rooting forAmerica -- The Linde Community Tree-Planting Program.

Linde's trees are American liberty elms, related to the American elms that linedstreets throughout the nation until they were largely wiped out by Dutch elm disease. These new elms are impervious to the disease.

Linde is making a $2,500 cash donation to the Anne Arundel Beautification Program to purchase the trees.

Information: 974-5300.

The following is a schedule of plantings and giveaways taking place in AnneArundel County during the rest of this month:

* Earth Week Celebration runs through April 26 at Arundel High School in Gambrills.

*The Berkshire Community Association will plant 20 shrubs in Riva between April 27 and April 28.

Information: 263-7590, 260-5901 or 974-3776.