South Korea has refused to send fertilizer north for the Spring planting, unless the northerners agree to negotiate some concessions. If the fertilizer doesn't head north soon, this years crops will be diminished. This has put enough pressure on the North Koreans to bring them back to the negotiation table. The southerners want the northern economy loosened up some more, and greater access provided to South Korean businessmen. South Korea believes that the businessman, not the infantryman, will take down the dictatorship up north.