A study in Sichuan hilly area looked at how different plant densities affect maize growth and yield in wheat and maize intercropping. They found that as plant density increased, individual maize plant size decreased, but overall crop quality improved. The best grain yield was seen at a density of 5.25-6 x 104 plants per hectare. Beyond this, yields decreased due to fewer kernels per ear and lighter grains, as well as more root lodging and stalk breakage. The ideal leaf area and dry matter accumulation for high yields were between 4.72-5.41 at silking stage and 6330.98-6898.80 kg/ha at silking stage, and 16541.33-16616.25 kg/ha at maturity stage.