Yan et al 2016 proposed that OPDs exhibited variations according to N management strategies Specifically for a 70 of optimal N rate treatment the OPD was 60 × 104 plants ha-1 with maize grain yield of

Yan et al. (2016) proposed that optimal plant densities (OPDs) varied depending on nitrogen (N) management strategies. Specifically, under a treatment with 70% of the optimal N rate, the OPD was 6.0 × 104 plants ha-1, resulting in a maize grain yield of 11.5 Mg ha-1. Increasing the N rate to 100% of the optimal rate (168.5 kg ha-1) led to an increase in OPD to 7.5 × 104 plants ha-1, with a higher yield of 12.5 Mg ha-1. However, when the N rate was increased to 130% of the optimal rate, the OPD further increased to 9.0 × 104 plants ha−1, while the yield declined to 11.8 Mg ha-1