WASHINGTON—New orders for U.S.-made goods fell in February, likely because of persistent shortages of materials and a shift in spending back to services, but manufacturing remains supported by low inventories at businesses. The Commerce Department said on Monday that factory orders fell 0.5 percent in February. Data for January was revised slightly higher to show orders rising 1.5 percent instead of 1.4 percent as previously reported. February’s decrease in factory orders was in line with economists’ expectations. Manufacturing accounts for 12 percent of the U.S. economy. An Institute for Supply Management (ISM) survey last Friday showed its index of national factory activity declined in March to the lowest level since September 2020, with factories reporting no let-up in supply chain challenges. The global supply crunch has been worsened by Russia’s war against Ukraine, which has sent prices for commodities like oil and wheat soaring. Though demand is reverting back to services, business inventories …