This study addresses the issue of the transportability of crawler agricultural equipment on clay loam. Soil samples of clay loam were collected, and mechanical properties were conducted to obtain the key parameters of mechanical properties. Ground elevation information was also collected and used to build a power spectral density function of ground roughness. Based on the mechanical properties of clay loam and ground elevation information, combined with specific structural parameters of the crawler agricultural equipment, a ground transportability simulation model of crawler agricultural equipment on clay loam was constructed. The settlement amount of the first road wheel was taken as the evaluation index, and the crosscountry transportability of crawler agricultural equipment on clay loam was studied by simulation analysis and experimental verification. The results showed that the maximum settlement of the first road wheel of crawler agricultural equipment was 135 mm and 170 mm, respectively, both of which were smaller than the ground clearance value of 280 mm for crawler agricultural equipment. Thus, the crawler agricultural equipment demonstrated good pass transportability on clay loam ground. The research results have strong practical significance and provide theoretical guidance and technical support for designing and optimizing crawler agricultural equipment.

Improving green total factor productivity in agriculture is the way to achieve highquality agricultural development, and it is also the title of implementing the concept of green development and promoting the transformation of agricultural modernization. On the basis of measuring the development level of rural inclusive finance and agricultural green total factor productivity, the effects of rural inclusive finance and human capital on agricultural green total factor productivity were tested empirically using the spatial Dobbin model and the moderating effect model. It is found that the rural inclusive finance can significantly improve agricultural green total factor productivity in this region and neighboring regions; human capital accumulation is beneficial to improve agricultural green total factor productivity in neighboring regions, but has no significant effect on the improvement of agricultural green total factor productivity in this region; the higher the level of human capital, the more obvious the effect of rural inclusive finance on agricultural green total factor productivity, and has a spatial spillover effect. Further study finds that the development of rural inclusive finance mainly promotes the improvement of agricultural green total factor productivity in the region by increasing farmers acceptance of financial services. Among the spatial spillover effects of rural inclusive finance on agricultural green total factor productivity, increasing the density of financial coverage, improving the use of financial services and improving the efficiency of financial services are all beneficial to agricultural green total factor productivity enhancement in neighboring regions, and the promotion effects are weakened in turn. Therefore, the indepth development of rural inclusive finance, with human capital as the carrier, focusing on cultivating financial servicesoriented talents and building a synergistic development mechanism between rural inclusive finance and human capital is the preferred path to realize the overall improvement of agricultural green total factor productivity.

Shelling is an essential part of walnut postharvest processing and plays an important role in the development of walnut industry in China. At present, in most areas of China, walnut harvesting was mainly based on primary processing, timeconsuming and laborious, with low mechanization degree, and the problems of low kernel exposure rate and high breakage rate in the shelling link and so on, which had become a key problem affecting the rapid development of walnut industry. Based on the analysis of 6 typical walnut shelling equipments structure, shelling principle, advantages or disadvantages, and so on, this paper expounded the development situation of walnut shelling equipment at home and abroad at present. This paper summed up the problems of walnut shelling equipment in China and it included single function, high operation cost, performance instability, low efficiency, poor universality, low utilization rate and so on. Finally this paper put forward to some relative measures and suggestions of our country in future. We should optimize and improve the key technology and structure, strengthen the application research of new technology, new theory and new method of walnut shelling and develop large walnut shelling equipment, promote the processing capacity of enterprises.

In order to study the effect of moisture content on the static friction coefficient of peanut pods, taking the main peanut varieties Wanhua 2 and Dabaisha 171 as experimental materials, the moisture content of peanut pods was regulated by DGF30/7-IA electric blast drying oven. The static friction coefficient of the peanut pod was measured by the static friction coefficient inclinometer based on the principle of statics. The effects of peanut varieties, contact materials, and pod moisture content on the static friction coefficient of peanut pods were analyzed by a single factor test. The results showed that the variation trend of the friction coefficient between peanut pods of different varieties and Q235 steel plate, large hole sieve, and small hole sieve was the same at all levels of water content. The static friction coefficient of the peanut pod increases with the increase in water content. The variation range of friction coefficient between Wanhua 2 and Q235 steel plate, macro sieve, and small sieve under different water content (10.18%, 1357%, 16.28%, 20.66%, and 25.85%) is 0.388-0.611, 0.494-0.819, and 0.553-0.975 respectively. The variation range of friction coefficient between Dabaisha 171 and Q235 steel plate, macro sieve, and small sieve under different water content are 0.42-0.622, 0.608-0.822, and 0.619-0.892, respectively. The variation trend of the friction coefficient between peanut pod and different contact materials is the same at all levels of water content. The static friction coefficient of Dabaisha 171 is less than that of Wanhua 2, and the fluidity of the peanut pod of Dabaisha 171 is better. The results can provide a reference for the simulation parameter setting and optimization design of peanut circulating drying equipment.

Aiming at the problems of limited operating capacity and excavation trajectory planning of ordinary boom excavators in the market, the operating range of the excavator under leveling condition is compared and analyzed taking the three section backhoe hydraulic excavator as the research object, and a motion planning method of the excavator under leveling condition is proposed, with the shortest excavation time as the goal. First of all, the working range of the three section excavator and the ordinary boom excavator under the leveling condition is simulated by MATLAB with the range of the rotation angle of each component of the working device as the boundary condition; Secondly, the solved operation range is divided into five sections, and with the shortest excavation time as the goal, the particle swarm optimization (PSO) algorithm is used to optimize the interpolation time of each joint. The optimal time that meets the conditions and the position, speed and acceleration curves of each cylinder are obtained. The simulation results show that the flattening range of this type of excavator is 12.13% more than that of ordinary boom excavator, and each hydraulic cylinder moves smoothly and meets the requirements of system flow. The time optimal motion planning method of this model under leveling conditions can be applied to the motion planning of excavation trajectory under other conditions, and ultimately provides theoretical basis and technical support for fully automatic excavation, improving operation efficiency and quality.

Grain drying is an important link in the postharvest grain production and is related to the issue of national food security. The farinfrared drying machine works at high speed with low energy consumption and effectively maintains the grain quality after drying. It gradually replaces the traditional hotair drying machine, becoming the new favorite of the market. This paper reviews the domestic and foreign researches of farinfrared drying technique in recent years and the current situation of the major market of the farinfrared drying machine. It also expounds the principle of the drying technique, the influence of process parameters and the advantages and disadvantages of combined drying technology. The existing problems of the machine includes firstly the hightemperature heat source with inadequate irradiation timespan, excessive instantaneous intensity, and incapability of drying heatsensitive materials, and secondly the technique of single method that leads to unsatisfied drying effect. The development direction has been put forward that the farinfrared drying equipment will lead to the machine equipped with combined drying technology and clean energy. In the end, it introduces a farinfrared drying machine that uses graphene infrared radiant panel as its new heat source, which provides ideas for developing new materials and new heat sources, and will hopefully help further researches of the farinfrared grain drying machine.

In order to ensure the accuracy of the parameters used in the simulation test of peanut pods, the study uses the method of combining actual physical test and simulation test to calibrate the discrete element simulation parameters. First of all, the basic physical parameters of peanut pods (including dimensions, density, moisture content, bulk density, elastic modulus, Poisson wave and shear modulus) are measured through actual physical experiments, and the simulation is determined based on the results of various physical quantities measured by actual physical experiments. The value range of the test parameters is carried out, and the PlackettBurman test is carried out. The factors that have a significant influence on the stacking angle are selected: peanut podpeanut pod static friction coefficient, rolling friction coefficient, peanut podsteel plate static friction coefficient. The value range of the significant factor is further determined by the steepest climb test. BoxBehnken test is carried out to establish the quadratic regression equation between the accumulation angle and the significant factor, and solve the equation with the actual physical test accumulation angle (31.63°) as the target value, and obtain the best simulation parameters:the static friction coefficient and rolling friction coefficient of peanut pods, and the static friction coefficient between peanut pods and steel plates are 0.74, 0.24 and 0.58, respectively. Finally, a simulation test on the best simulation parameters determined after the experimental analysis is performed, and an independent sample T test on the obtained simulation value and the actual test value is performed, with P>0.05, which shows that there is no significant difference between the actual test accumulation angle and the simulation test accumulation angle, and the relative error is 2.877%,  the accuracy of the simulation test is also verified. By comparing the methods and test results used in the calibration of other material parameters, it further shows that the calibrated parameters can provide references for related research.

 Crop harvesting efficiency has improved dramatically with the expansion of the crop planting scale and the popularization of mechanized harvesting methods. Grain mechanized drying is a significant development direction of postpartum crop processing. The traditional artificial drying efficiency is low and unsuitable for modern agricultural production. The mixedflow dryer has attracted extensive attention as the most widely used dryer. This paper expounds on the working principle and structural composition of the mixedflow dryer and compares the research status at home and abroad from three aspects: key component design, control system research, and auxiliary research means. This paper introduces the energy configuration of the mixedflow dryer and the main problems of the dryer, such as poor equipment universality, low degree of automation, inaccurate simulation test results, large dust in the drying process, and nonintegrated machine technology. The mixedflow dryer is prospected by improving equipment universality, developing automatic monitoring and monitoring components, improving modeling accuracy, designing and developing relevant dust removal equipment, and mechanical technology integration.

The self-propelled continuous operation baler is a new type of straw collection equipment that realizes continuous baling operations. The failure of one of its key functional components will seriously affect the regular baling work. This paper proposed a fault diagnosis method combining rough sets and genetic algorithms to monitor, prevent, and control gearbox faults. This method used the multiple fault characteristic parameters obtained from time-domain and frequency-domain analysis as conditional attributes and the fault type as decision attribute to obtain a decision rule table using the genetic algorithm and realize the attribute reduction without prior information. In the gearbox fault diagnosis experiment, signal acquisition and diagnosis analysis were carried out on different fault types. The results showed that the method reduced the 12 fault characteristic parameters into 3 when no prior information was given. The accuracy of fault diagnosis according to the decision rule table was 100%. The results showed that this method could accurately determine the occurrence and type of faults, which was of great significance to fault monitoring, prevention, and control.

In order to understand the operating characteristics of fixed bed reversing ventilation drying of peanut and provide suitable parameters for the box type reversing ventilation drying equipment, a series of partial differential equations was established based on the heat and mass transfer between peanut and air. On this basis, the finite difference method was used to simulate the drying process. The effects of the length of ventilation drying time from bottom to top in the left and right drying chambers, the reversing time in the reversing drying stage, and the ventilation volume per unit volume on the drying behavior were analyzed. The optimal ventilation and drying parameters were determined by uniform design and comprehensive weighted scoring method. The results showed that in the bottomup ventilation stage, the heat was mainly used to heat peanut materials and rapidly evaporate the water in peanut pod surfaces. The drying and heating rate of the lower, middle, and upper materials was different, and it was easy to form a large moisture gradient. In the reversing ventilation drying stage, the material temperature fluctuated like a wave, which could effectively control the drying uniformity of the whole bed. Shortening the ventilation time from bottom to top was helpful to reduce energy consumption and moisture difference, but it had little impact on drying time and productivity. In addition, the change of reversing time had little influence on time consumption, productivity, energy consumption, and moisture content difference. The increase of ventilation volume would help to reduce drying time, water difference, and productivity, but energy consumption would also increase rapidly. Uniform design and synthetical weighted marks were used for solving optimal ventilation parameters. The results showed that the comprehensive effect of batch drying was the best when the ventilation volume was 1 394 m3/(m3h) with moisture content greater than 25%, 838 m3/(m3h) with moisture content between 15%-25%, and 1 760 m3/(m3h) with water content less than 15%. Finally, the accuracy of the model simulation was verified by the verification experiment. The results showed that the correlation coefficient between the simulation results and the experimental results was more than 0.98, which reflected that the simulation could accurately describe the changes in material temperature and moisture content in the drying process. This study provided a reference for the improvement of peanut reversing ventilation drying equipment and process optimization.