HAMID OULD AHMED and LAMINE CHIKHI FEWER  than one in four Algerian voters took part in Sunday's constitutional referendum, officials said, despite government efforts to encourage high turnout as part of a strategy to turn the page on last year's political unrest. President Abdelmadjid Tebboune and the powerful military had presented the new constitution as a sign that they had addressed the causes of public anger that prompted mass weekly protests for more than a year. The referendum result will be announced on Monday at 10 a.m. (0900 GMT). However, Sunday's turnout of only 23.7%, according to the election body,…