Relationship of field scale nitrogen variability to soil properties and remotely sensed characteristics

摘要

Spatial distribution of soil available nitrogen was related to total soil nitrogen, total soil carbon, percent sand, percent 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. Foe;d areas wotj greater c;au cpmtemt had lower available nitrogen, shorter plants, and greater total soil nitrogen and carbon. Normalized Dofferemce Vegetation Index was positively correlated with soil available nitrogen, plant height, and yield.