1, "one spraying and three prevention" refers to spraying pesticides once in the growing period of crops to control pests and weeds and adjust nutrition. The integration of grain, water and fertilizer refers to the rational use of water resources and scientific fertilization in the process of agricultural production to achieve high efficiency, sustainability and environmental protection of grain production.

2. "One Spray and Three Preventions" is related to the integration of grain, water and fertilizer, but it is not exactly the same. "One spraying and three prevention" pays more attention to the prevention and control of diseases, pests and weeds, while the integration of water and fertilizer in grain pays more attention to the rational utilization and management of water resources and fertilizers, aiming at improving grain yield and quality.