Shen, B.G. , Dai, J.Y. , Zhang, X.D. and Duan, Z.H. 2021. Nondestructive Testing of Lettuce Nitrogen Stress Based on Multidimensional Image. JOURNAL OF ADVANCES IN AGRICULTURE. 12, (Jun. 2021), 44–60. DOI:https://doi.org/10.24297/jaa.v12i.9063.