This experiment was conducted to find out the influences of different patterns of nitrogen and potassium distribution and its residual effects on dry matter and nutrient productivity in a mixturey grassland established at the Livestock Experiment Station in Suweon The results obtained are summarized as follows; 1. The residual effect of nitrogen and potassium fertilization in spring season was relatively higher than those in summer. 2. The residual effect on dry matter and nutrient productivity persisted for 3-6 months after fertilization. 3. It was desirable for nitrogen and potassium fertilizers to be dressed heavily in spring and at less than 0% in midsummer.