Xie, Chuanqi, Ce Yang, Alexander Hummel Jr, Gregg A Johnson, and Forrest T Izuno. 2018. “Spectral Reflectance Response to Nitrogen Fertilization in Field Grown Corn”. International Journal of Agricultural and Biological Engineering 11 (4):118-26. https://doi.org/10.25165/ijabe.v11i4.2960.