The basic thrust of the Second Seven-Year Plan (1978–1984) was to achieve the three-pronged goals of self-reliance, modernization, and "scientification". Although the emphasis on self-reliance was not new, it had not previously been the explicit focus of an economic plan. This new emphasis might have been a reaction to mounting foreign debt originating from large-scale imports of Western machinery and equipment in the mid-1970s. Through modernization North Korea hoped to increase mechanization and automation in all sectors of the economy. "Scientification" means the adoption of up-to-date production and management techniques. The specific objectives of the economic plan were to strengthen the fuel, energy, and resource bases of industry through priority development of the energy and extractive industries; to modernize industry; to substitute domestic resources for certain imported raw materials; to expand freight-carrying capacity in railroad, road, and marine transportation systems; to centralize and containerize the transportation system; and to accelerate a technical revolution in agriculture.