Yong Chen, Junwu He, Xing Yu, Hao Ma, Shengsheng Wang, Xiuli Zhang, Xinyu Ji, Xiaochan Liu Keywords watermelon seed, discrete element method, Plackett-Burman experiment, steepest-climbing design, Box-Behnken response surface analysis Full Text: PDF References Liu H J, Chen Y Q, Lin M, Bai X S, Deng C H, Pan J H, et al. Selection of superior varieties (Lines) of seed-watermelon based on growth period and economic yield. Xinjiang Agricultural Sciences, 2018; 55(3): 430–438.