TY - Acta Agronomica Sinica A1 - YANG Hai-Bo,ZHANG Jia-Kang,YANG Liu,JIA Yu-Ze, ,LI Fei T1 - Effect of variety and growth period on NDVI estimation of nitrogen concentration in potato plants Y1 - 2020-06-12 JF - Acta Agronomica Sinica JO - Acta Agronomica Sinica SP - 950 EP - 959 VL - 46 IS - 6 UR - https://zwxb.chinacrops.org N1 - 10.3724/SP.J.1006.2020.94121 ER -