Limited reports exist on identifying the empirical relationships between plant nitrogen and water status with hyperspectral reflectance. This project is aiming to develop effective system for nitrogen and water management in wheat. Specifically: 1) To evaluate the effects of nitrogen rates and irrigation treatments on wheat plant growth and yield; 2) To develop methods to predict yield and grain protein content in varying nitrogen and water environments, and to determine the minimum nitrogen and water required to maintain wheat grain yield and quality; and 3) To develop models predicting yield loss due to nitrogen stress and yield loss due to water stress. Experiment was conducted at two experimental locations in south-west Idaho: at University of Idaho Parma Research & Extension Center and in a cooperating grower’s field, Notus, ID in 2015. Irrigation treatments (3 irrigation levels) were the main plots, and treatments of nitrogen fertilization (4 nitrogen fertilization levels) were randomized within each main plot. The water was applied every 7 days utilizing the subsurface drip irrigation system. Dripper line was placed at 8 inch depth and spaced 28 inches apart. Three irrigation treatments of 50, 75, and 100 % of measured evapotranspiration were randomly assigned. Irrigation with the subsurface system was scheduled based on the estimated crop water use model by AgriMet. Crop physiological parameters were evaluated throughout the growing season: plant height was measured with a measuring ruler, crop reflectance was measured with GreenSeeker 505, chlorophyll content was estimated with SPAD, soil moisture was measured with ML3 Delta-T soil moisture sensor. Spring wheat grain yield responded differently to N and water application at two experimental sites. Significant differences in yield associated with N treatments were more pronounces at Parma (loam), compared to Notus (loamy sand). Lower soil organic matter (1.2%) coupled with sandy soil texture resulted in lower nutrient holding capacity, compared to Parma site (3.3% organic matter, loamy texture). For both locations, the optimum water treatment was 75% ET. Strong linear relationship was observed between the ET rate and soil VWC. Study will be repeated for two more growing seasons in Idaho and Montana.