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Characterizing Water and Nitrogen Stress in Corn Using Remote Sensing

^a Plant Science Dep., South Dakota State Univ., Brookings, SD 57007
^b Engineering Resource Center, South Dakota State Univ., Brookings, SD 57007

View larger version (22K): [in a new window]   Fig. 1. Validation of the 13C discrimination approach for estimating yield losses due to water (YLWS) and N stress (YLNS).

View larger version (23K): [in a new window]   Fig. 2. The influence of N and water stress on narrow-band reflectance measured on 28 July 2003. Values labeled as 0W and +W represent natural rainfall and supplemental irrigation, respectively; 0N and +N represent unfertilized and fertilized treatments, respectively. In (b), 0W N stress is the difference between the +N and 0N treatments in the 0W treatment. The +W N stress is the difference between the +N and 0N treatment in the +W treatment.