The design optimization of rotary tillage tool by the application of Computer Aided Engineering (CAE)-Techniques on the basis of finite element method and simulation method is done by using CAD-Analysis software for the structural analysis. The different tillage tool parts of rotary tillage tools are geometrically constrained by the preparation of solid model, Meshing and Simulation is done with actual field performance rating parameters along with boundary conditions .The energy constrained for the tillage tool applications with 35Hp and 45Hp power tractor and estimated forces acting at soil-tool interface. The resultant effect on tillage blade and whole rotavator assembly is obtained from stress distribution and deformations plots.The proposed work results in identifying sufficient tolerance in changing the dimensions of rotavator frame sections and side gear box for removing the excess weight in a solid section and also to raise the weight of blade for a reliable strength. The present working model with tillage blade is analysed to new design constraints with change of its geometry for the maximum weed removal efficiency by presenting its practical results from the field performance.

Drones are now a days emerging as a component of precision agriculture along with contributing to sustainable agriculture. The use of advanced technologies such as drone in agriculture offer potential for facing several major or minor challenges. The major applications of drone in agriculture are spraying, irrigation, crop monitoring, soil and field analysis and bird control. The objective of this paper is to review the latest trends and applications of leading technologies related to agricultural UAVs equipment, and sensors development. And also, the use of UAVs in real agricultural environments. Based on the literature, found that a lots of agriculture applications can be done by using Drone. In the methodology, we used a comprehensive review from other researches in this world. Furthermore, the future development of agricultural UAVs and their challenges are considered. In this review paper, summarizes the available agricultural drones and applications of UAVs for Precision Agriculture using different sensors to evaluated agricultural parameters such as NDVI, vegetation index, NIR, nutrient disorder using sensors like RGB, digital camera, multispectral and hyperspectral sensors and to reduce the wasting of water and chemicals quadcopter, hexacopter UAVs could be used.

The traditional method and mechanisms used for dehulling, cracking, shelling, squeezing or pressing of nuts in the post harvesting operation, is constrained to single platform with multi-operational facilities due to the oil splash ,wound making, poisonous material causing a health hazards hence the vertical cut plane with easy exchange facility by chuck mechanism for cutting tool as well as fixture for material for minimum throughput time and human comfort has been considered in the new design called Multi-Nut dehulling machine. The average product material efficiency was 85.29%, mechanical damage was 14.71% out of 100% shelling and the throughput capacity was 0.60 kg/hr for marking nut. This performance was better than the traditional dehulling, notch and curved blade type dehulling. Splashing of the BSL in marking nut dehulling with multi nut dehuller was observed negligible. The Product material efficiency 72.23% , mechanical damage 27.77% and the throughput capacity was 2.48 Kg/hr for walnut. Machine can cut areca nut 1 kg /hr of the size 10-15 mm.

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