In North America optimal planting density increased by about 18000 plants ha-1 with yield increasing by 35 Mg ha-1 in which planting density contribution to maize yield gain ranges from 85 to 17按照fiel

In North America, the optimal planting density has seen an increase of approximately 18000 plants per hectare, resulting in a yield increase of 3.5 metric tons per hectare for maize. The contribution of planting density to maize yield gain ranges from 8.5% to 17%. These findings adhere to the standards set by the Field Crops Research journal.