The promotion of soybean and corn strip compound planting mode is one of the important measures to revitalize domestic soybeans and increase oil production capacity, which can effectively alleviate the difficulties of Chinas soybean dependence on foreign countries and high import pressure. Based on the analysis of the promotion and implementation of soybean and corn strip compound planting mode in southwest China, Huanghuaihai and northwest China in 2022, this paper summarizes the current status of mechanized technology and equipment for soybean and corn strip compound planting in each region. It is proposed that the problems faced by the mechanization of soybean and corn strip compound planting mainly include the lack of special tools for herbicide spraying and harvesting, the serious shortage of existing available production equipment, the low quality of mechanical operation, poor applicability, and nonstandard operation of machine operators. In view of the existing technical problems, the phased development suggestions of mechanization technology and equipment for soybean and corn strip compound planting production in China are put forward, and the method of first partial and then all, easy and then difficult is gradually promoted, first solving the problem of mechanization in Huanghuaihai and northwest China, and then conducting research and development for hilly and mountainous areas to realize the whole process of mechanization in most parts of the country, and finally comprehensively using electronic information and sensor technologies such as autonomous navigation assistance driving technology, autonomous avoidance technology and remote sensing telemetry technology to improve the mechanization technology level of machine tools. It provides a reference for promoting the comprehensive mechanization and highquality development of Chinas soybean and corn strip compound planting mode.

The droplet size is an important indicator of performance evaluation of plant protection spray and work quality machinery. It is the key technical parameters to achieve pesticides zero-growth and precision spraying. The study of best biological particle size in pesticide use and the study of immersion models and fog droplets evaporation deposition models are related to the size of the fog droplet size. This paper summarizes the various fog droplets test techniques. The fog droplet diameter of Φ0.3 mm, Φ0.7 mm, Φ1.0 mm, Φ1.3 mm, and Φ1.6 mm are measured and evaluated. Analysis of the sources of uncertainty during the measurement process were performed. The results show that when the inclusion probability is 95%, the minimum expanded uncertainty of the measurement results is 6.63%, the maximum expanded uncertainty is 9.18%, and the average expanded uncertainty is 7.38%. The laser particle size analyzer is accurate and reliable in measuring the particle size of the droplets, which can meet the needs of the droplet particle size testing of plant protection machinery.