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AMA, Agricultural Mechanization in Asia, Africa and Latin America

AMA, Agricultural Mechanization in Asia, Africa and Latin America (AMA) (issn: 00845841) is a peer reviewed journal first published online after indexing scopus in 1982. AMA is published by Farm Machinery Industrial Research Corp and Shin-Norinsha Co. AMA publishes every subjects of general engineering and agricultural engineering.

Submission Deadline
24 Nov 2022 (Vol - 53 , Issue- 11 )
Upcoming Publication
30 Nov 2022 (Vol - 53 , Issue 11 )

Aim and Scope :

AMA, Agricultural Mechanization in Asia, Africa and Latin America

AMA, Agricultural Mechanization in Asia, Africa and Latin America (ISSN: 00845841) is a peer-reviewed journal. The journal covers Agricultural and Biological Sciences and all sort of engineering topic. the journal's scopes are in the following fields but not limited to:

Azerbaijan Medical Journal Gongcheng Kexue Yu Jishu/Advanced Engineering Science Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery Interventional Pulmonology
Agricultural and Biological Sciences
Electrical Engineering and Telecommunication
Electronic Engineering
Computer Science & Engineering
Civil and architectural engineering
Mechanical and Materials Engineering
Transportation Engineering
Industrial Engineering
Industrial and Commercial Design
Information Engineering
Chemical Engineering
Food Engineering

Development of Differential Steering Gearbox for Crawler Combine Harvester

Paper ID- AMA-16-10-2021-10798

The crawler combine harvester fits better in paddy soil farmland because of its much smaller pressure between the ground and track than that of wheeled vehicle. However, the existing unilateral brake steering mode in crawler combine harvester has led to inflexibility and caused many problems. This paper developed a differential steering gearbox (DSG) that could realize any turning radius in the form of dual hydraulic static transmission (HST) combining with a mechanical gearbox. The mathematical relationship of all motion states was deduced. The principle of the DSG was analyzed by using virtual prototype simulation software RecurDyn, as well as dynamic performance under three different working modes of dual HST. The size of the turning radius is only relevant to the steering HST output speed but has nothing to do with the straight HST output speed. Experiment results showed that the error rates of the transmission ratios of the straight (low, middle, and high speed) and steering routes were 0.1%, 0.8%, 0.5%, 0.8% respectively, which well verifies the developed DSG model and principle. This research can provide theoretical basis for optimal design and data support for electronic control of the gearbox.

Subsurface shallow drip irrigation improved the yield and water & nitrogen use efficiency of spring maize in the semiarid region of Northeast China

Paper ID- AMA-16-10-2021-10797

Water use efficiency (WUE) and nitrogen use efficiency (NUE) of the spring maize need to be further improved in the semiarid climate type area of Northeast China. We have undertaken a 2-year field test in the 2017- 2018 growing period. The objective was to find out the effects of conventional furrow irrigation (FI), surfaced drip irrigation (DI), and subsurface shallow drip irrigation (SSDI) on the grain yield (GY), WUE & NUE of spring maize. The GY of SSDI and DI was 11.3% and 16.2% higher than that of FI, respectively. The WUE of SSDI and DI was higher than that of FI by 19.4% and 31.2%. And the NUE have respectively raised by 13.6 % and 19.9 %. The performance of SSDI was significantly better than DI. In the soil layer of 0- 60cm, the root length density (RLD) of FI was substantially increased compared with that of DI. However, SSDI and DI were higher than FI below 60 cm soil layer. Drip irrigation, especially SSDI, increased the total nitrogen accumulation in the plant, decreased the 〖NO〗_3^--N contents at the harvest stage, ensured the topsoil‘s nitrogen supply, and thus improved the NUE. In general, the SSDI technique substantially improved the GY, WUE and NUE of spring maize in the semiarid area of Northeast China.

Investigating effect of cutting parameters on surface roughness and predicting surface roughness in the hard turning of hardened SKD 11 steel (60HRC) using mixed Ceramic inserts

Paper ID- AMA-16-10-2021-10796

The objective of this paper is to perform the innovative design for the new structures of cam-controlled planet SKD11 cold tool steel is a high-carbon and high-chromium alloy tool steel that is used to make cold work or hot work dressing dies, sides of rollers, screw lines, lines dies, transformer core stamping dies, rolled knives, steel tube forming rollers, special molding rollers, screw heading molds. The hardened SKD11 steel has a high hardness 58-62HRC good wear resistance and good toughness. Hard turning is an important process because all manufacturers are continually seeking ways to manufacture their parts with lower cost, higher quality, rapid setups, lower investment, and smaller tooling inventory while eliminating non-value-added activities. In where Surface roughness is an important parameter determining the accuracy and quality of parts. Analysis of surface roughness is presented by many researchers based on cutting conditions during hard turning. In this paper, analysis of surface roughness of SKD11 steel in hard turning with mixed ceramic inserts is performed based on variables like cutting speed, feed, and depth of cut. The feed rate is the most significant parameter affecting the surface roughness in the machining process. Prediction of surface roughness considering the simultaneous effect of cutting parameters is very difficult. Here, a mathematical model is developed based on the simultaneous effect of depth, cutting speed, and feed rate. Moreover, the developed model is validated using different sets of cutting conditions and found in close agreement with experimental results.

Deciphering the Genetic Components in Sesame (Sesamum Indicum L.) under different Environmental Conditions

Paper ID- AMA-15-10-2021-10794

Ten genetically diverse sesame (Sesamum Indicum L.) parents were crossed in half diallel fashion. Ten parents along with their 45 F1 progenies excluding reciprocal were evaluated in a randomized block design with three replications under normal (E1), late (E2), very late (E3) sown conditions of Rajasthan. The evaluation of components of genetic variation manifested that both additive (D) and dominance (H1 and H2) components were significant for all the attributes except capsule girth in very late sown condition where additive dominance model fitted. This revealed that fixable as well as non- fixable component of variances were operating in the expression of the traits. The graphical analysis revealed that there was partial dominance to over dominance for different characters under normal, late as well as very late sown conditions. The scattering of array points indicated the existence of genetic diversity among the parents for most of the traits.

Analysis of Conformal CPW fed Copper and Multiwalled Carbon nanotube microstrip antennas in X- Band Applications

Paper ID- AMA-14-10-2021-10793

This paper, describes the characteristics of flat and curved antenna structures using copper and Multi- Walled Carbon Nano-Tube (MWCNT) materials. A flexible dielectric substrate, polyimide material with dielectric constant εr= 3.5, tan δ = 0.008, the thickness of 0.1mm, is employed here. The low thickness of dielectric material allows it to be mounted on curved surfaces. The CPW fed conformal structures are designed to resonate at 10 GHz in the X-band (8GHz - 12GHz). Cylindrical curvature structured antennas designed with different radii (10mm, 15mm, and 20mm), and investigated their performance interims of return loss (S11), bandwidth, gain, and radiation efficiency, etc. Here a thin film MWCNT antenna is prepared by using a spin coating technique. The analysis of comparative study for both planar and flexible antennas are carried out in the present investigation. Both simulation and fabrication results are in close agreement with each other. From the experimental results, the planar and conformal antennas (copper and MWCNT) offer approximately the same impedance bandwidth around 33%but antenna gains is reduced from flat to curved structures of different radii (20mm, 15mm, and 10mm) in the intended direction. Material resonant properties and feeding techniques allow to enhance impedance bandwidth. The resistivity of the conductive material used in the antenna design increases as the bending angle is increased, this leads to a gradual increase in beam width and hence a drop in gain within the operating band of frequencies. The MWCNT antennas are suitable for low- power communication applications and in gas and harsh chemical environments where conventional materials get effected. Conformal antennas are widely employed in satellite, automobile and defense, Synthetic aperture radar applications.