The bombmaking materials that were allegedly discovered in the motel room of Pfc. Naser Abdo, the soldier accused of plotting an attack near Fort Hood, Tex., correspond with a list of bombmaking “ingredients” published last year in an al-Qaeda magazine.

The ingredients were listed in an article that appeared last year in Inspire, the English-language magazine of al-Qaeda’s Yemen-based affiliate. That same article, titled “Make a bomb in the kitchen of your Mom,” was found in Abdo’s backpack, along with items including wires, gunpowder and a pressure cooker, according to an affidavit filed Friday in federal court in Waco.

Inspire is believed to be produced by Samir Khan, a Saudi-born U.S. citizen raised in Queens, N.Y., and, as the title suggests, is aimed at inciting violence in the support of Islamic extremists. One article suggested that readers affix blades to the front of a truck to “mow down” civilians; another recommended the best positions from which to fire weapons.

The bombmaking recipe turned up last year in a terrorism case in Britain. Nine men who were arrested in a plot to allegedly attack various targets, including the U.S. Embassy, also tried to adopt the bomb-making instructions from Inspire, officials said.

Maj. Nidal Hasan, the U.S. Army psychiatrist who is charged with killing 13 in a shooting spree at Fort Hood, was in frequent e-mail contact with Anwar al- Aulaqi, a U.S.-born radical cleric and prominent member of al-Qaeda in the Arabian Peninsula.