Planting dates also have a large influence on crop development.In our studies with winter wheat, late-planted wheat suffered significant yield reductions that could not be overcome with fertilization.

• 播种时间对作物影响也很明显，我们在冬小麦研究中发现，播种晚，小麦减产严重，即便施肥也不能弥补播种晚所造成的损失。