This document summarizes research on modeling nutrient distribution under drip fertigation. It discusses how the HYDRUS-2D model was used to simulate water and nutrient movement in soil under different fertigation strategies. The results showed that applying nutrients in the second half of irrigation with a 2 day interval led to more uniform distribution of water and nutrients in the root zone compared to other fertigation strategies or longer irrigation intervals. The model is useful for optimizing drip fertigation system design and management.