Status quo and advance on research of variable-rate spraying technology

Traditional equable-spraying bring not only waste but also pollution,while the variable-rate spraying as a key technology of precision agriculture is effective and feasible because it can reduce the usage of herbicide,so it can decrease costs and lighten environment pollution.The paper introduced weed identification based on computer vision about color,shape,texture,spectrum and position;defined variable-rate spraying technology,summarized the achievement about this area in abroad and domestic,and also discussed its develo-pmental prospect and difficulties in its enforcement.