RICHMOND, JAN. 4 -- Political extremist Lyndon H. LaRouche Jr. and off-again, on-again candidate Gary Hart are expected to be among eight candidates awarded places on the March 8 Democratic primary ballot when the State Board of Elections meets here Tuesday.

The so-called Super Tuesday Democratic primary will be the state's first-ever binding presidential preference vote. That same day, Republican voters will participate in a nonbinding "beauty contest," probably choosing among six GOP presidential candidates.

The Democratic and Republican presidential candidates certified at Tuesday's elections board meeting will have until Jan. 20 to return formal declarations of candidacy that will place their names on the ballots, according to Susan H. Fitz-Hugh, board executive secretary.

Candidates likely to be on the Democratic ballot with LaRouche and Hart are former Arizona governor Bruce Babbitt, Massachusetts Gov. Michael S. Dukakis, Rep. Richard A. Gephardt (Mo.), Sen. Albert Gore Jr. (Tenn.), Jesse L. Jackson and Sen. Paul Simon (Ill.). The Republican ballot is likely to list Vice President Bush, Senate Minority Leader Robert J. Dole (Kan.), Rep. Jack Kemp (N.Y.), Marion G. (Pat) Robertson, former secretary of state Alexander M. Haig Jr. and former Delaware governor Pierre S. (Pete) du Pont IV.

In previous years, both parties in Virginia selected delegates to their national conventions at mass meetings and district caucuses.

But last year, over Republican opposition, the Democrat-controlled General Assembly voted to join a number of other states, most of them in the South, in scheduling a primary on March 8. Maryland voters also will pick their presidential favorites that day.

In Virginia, 13 of the 14 presidential candidates -- all but LaRouche -- would earn places on the ballot as the result of qualifying for federal marching funds, which is one of three ways for a candidate to get on the ballot in the Old Dominion.

Supporters of LaRouche, a perennial candidate whose national headquarters is in Leesburg, obtained more than the minimum 12,630 signatures of Virginia voters necessary to petition a candidate on the ballot, according to Julia Sutherland of the state Democratic Party.

A third way a candidate can get on the ballot is to be proposed by the Democratic or Republican state central committees, but spokesmen for the parties said none was so designated.

No delegate names will appear on either the Democratic or Republican ballots.

But all but 10 of the 85 Democratic delegates to the party's national convention in Atlanta will be committed to support candidates in proportion to the vote each candidate gets in the primary, providing that a candidate gets at least 15 percent of the total votes cast.

Of the 75 committed delegates, 49 will be selected at 10 congressional district conventions; 16 will be named at the state's party convention in June, and 10 spots are given to elected officials. The 10 delegates who will not be bound to the outcome of the primary are the governor and nine other party leaders.

The 50 Republican delegates to the GOP convention in New Orleans will be selected, as in the past, at mass meetings; three at each of the 10 congressional districts caucuses, and 20 at the state convention in Roanoke.

The state's participation in the primary has prompted a number of the candidates to visit the state, although few have so far collected major endorsements.

The exceptions include, among the Republicans, Sen. Paul S. Trible Jr.'s backing of Dole and Richmond Rep. Thomas J. Bliley Jr.'s endorsement of Bush. Democratic Rep. Frederick C. (Rick) Boucher is supporting Gephardt.

Democratic hopefuls Simon and Gore have called on Gov. Gerald L. Baliles at the Statehouse; Dukakis held a fund raiser here, and before he dropped out of the race last summer, Hart met with Lt. Gov. L. Douglas Wilder.