Martin Marietta of Bethesda, Md., posted lower...

Martin Marietta of Bethesda, Md., posted lower net earnings for the 1986 year, despite record high sales. “Operating earnings rose nearly 13% for the year and 20% in the fourth quarter, reflecting good sales and earnings gains in aerospace and materials,� a spokesman said. “With additional expenditures for business development having peaked, we expect further earnings growth in 1987.� New accounting standards, which required an adjustment in the method of calculating pension expense, had the effect of adding 16 cents per share, or 4 cents in each quarter, to 1986 earnings.