South Korea has been agonizing over a recent request from North Korea for an ``unusually’’ large volume of fertilizer aid, officials in Seoul said Sunday. According to the Korean National Red Cross (KNRC), the North’s Red Cross sent a telephone message on Jan. 13 asking for 500,000 tons of fertilizer for this spring. It marks a large increase from the 300,000 tons that Seoul has shipped to the North every year _ 200,000 tons in the spring and the remaining 100,000 tons in the autumn _ since the historic 2000 inter-Korean summit in Pyongyang, with the exception of 2001. South...