Spatial distribution of soil available nitrogen was related to total soil nitrogen, total soil carbon, % sand, % clay, Normalized Difference Vegetation Index (NDVI), plant height and yield. Soil samples were taken from 72 points on a 1 acre grid in an irrigated cotton (Gossypium hirsutum)field. Field areas with greater clay content had lower available nitrogen, shorter plants, and greater total soil nitrogen and carbon. Normalized Difference Vegetation Index was positively correlated with soil available nitrogen, plant height, and yield.