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.
WOS Indexed (2025)
27 Nov 2025 (Vol - 56 , Issue- 11 )
30 Nov 2025 (Vol - 56 , 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:
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
Design and Experimental Research on the Key Components and the Whole Unit of the Electric Ditching and Fertilizing Machine for Orchards
An electric ditching and fertilizing machine was designed for orchards to enhance the environmental sustainability of mechanized orchard fertilization and reduce production costs and labor intensity in China. The design considered the agronomic requirements of domestic miniaturized orchards. Driven by a pure electric main engine, equipment could perform ditching and fertilizing functions simultaneously. Its main working parts were composed of a fertilization assembly, a ditching cutter assembly, and a transmission block body. The work elucidated the design principles of key components and the entire unit and verified the operation quality of the model through field tests. The stability of the ditch depth reached 85.0%, and the coefficient of variation for consistency in fertilizer discharge per row reached 8.5%. The coefficient of variation for stability in total fertilizer discharge reached 6.2%, and the uniformity coefficient of fertilizer discharge reached 65.0%. The fertilizer’s broken rate was 4.0% at a forward velocity of 0.7 km/h, with a ditch depth of 16.5 cm, a ditch surface width of 18.0 cm, and a ditch bottom width of 10.0 cm. The agronomic requirements of electric ditching and fertilizing operations could be met in orchards. The research provides a reference for the in-depth research and development of miniaturized fertilizing machinery in the fruit industry.
Study on the mixing behavior of elliptical Jet in uniform flow and its application
A numerical investigation has been carried out to study the influence of nozzle geometry on the mixing characteristics and turbulent behaviors in turbulent jets. The geometry investigated was ellipse lip shape with aspect ratio of 6 and 10. By substituting an equivalent area rectangular jet a large aspect ratio rectangular jet (AR=6 and 10), the elliptical jet in uniform flow was computationally modeled using the realizablek-ε model parameters. The numerical calculation focused on time-average centerline concentration dilution of elliptical jet at the same momentum flux (Me =5.〖10〗^4) under a jet to ambient velocity ratio (R’=45) and a very high Reynolds number to ensure the turbulent condition in order to compare the numerical model with the experimental data. The model has been rigorously validated by a series of basic experiments designed to give concentration data that allows an accurate determination of the jet properties. We found out that there was no discernible difference between the two centerline dilutions of the two different aspect ratios. The examination of the cross-sectional images indicates that the spreading rate in the major and minor axis planes is totally different, the cross-sectional shape of the elliptical jet kept changing with time, large spreading is observed in the minor axis plane than that in the major-axis plane, and this causes the jet to gradually decay from its initial shape to the ultimate rounded one. Furthermore, the effect of the axis switching of elliptical jet can be clearly observed at the distance cross-section x =4D to 13.3D. The calculated results reported that the spreading and decay rate of the elliptic nozzles are higher than results for round jets. The jets issuing from the elliptic nozzle have great mixing of the surrounding fluid.
Physico-chemical characteristics and nutritional composition of fatty acids of local and imported Bovine meat raised on herbal pastry
The objective of this work is to compare the physico-chemical characteristics and nutritional composition of meat fatty acids, which indicate the quality of the local breed in Algeria and that of the imported. Twenty individuals of each breed were used and left grazing feeding in grassland on grassy pasture for 120 days. At slaughter, five animals from each group were slaughtered and samples of muscles of the rectum were removed and analytical measurements were carried out on the physicochemical level and determination of fatty acid contents. A gradual acidification for both bovines (was distinguished): up to a pHu 5.49 ± 0.16 on the 14th day conservation for the local bovine and 5.48 ± 0.14 for the imported one. The water retention capacity increased in parallel with the pH drop and reached a value of 0.56 ± 0.19 g / g at (after) the 14th days post mortem (local bovine) and 0.86 ± 0.51 g / g post-mortem (imported cattle). Total lipids were significantly higher in meat from imported cattle compared to the local cattle group (3.17 ± 0.27 VS 2.87± 0.32 g/100g muscle). The levels of saturated fatty acids are significantly higher in meat from the imported population compared to those recorded in meat from the local bovine population (2039.83 ± 27.90 VS 1696.77 ± 48.32 mg/100g muscle). Among these saturated fatty acids, palmitic acid appears significantly high in imported beef compared to local beef (1144.33 ± 19.68 VS 922.95 ± 21.10 mg/100g muscle). Regarding the content of polyunsaturated fatty acids, is very significantly higher in the meat of the local population compared to that recorded in the meat of the imported population (346.71 ± 33.44 VS 186.47 ± 16.35 mg /100g muscle) which is more in line with the recommendations of nutritionists. On the other hand, we note that linolenic acid is significantly high in meat from the local population compared to that recorded in meat from the imported population (136.30 ± 7.51 VS 103.52 ± 7.79 mg/100gmuscle). For monounsaturated fatty acids, no significant difference was observed between the two groups of cattle. The sum of omega 3 fatty acids was significantly high in meat from the local population compared to that recorded in meat from the imported population (72.33±8.35 VS 32.29 ± 4.33 mg/100g). For the lipid profile the report polyunsaturated fatty and saturated fatty acids ratio (0.20±0.02 VS 0.09±0.01) for the rectum femoris muscle were also dietetic more favorable for the local population than the imported group.
Light Microscopic and Histochemical insights in the kidneys of Aseel birds
A study was conducted to find out normal histology and histochemistry in kidneys of Aseel birds. The cortical areas were larger and lobulated, though it was challenging to differentiate the lobes due to minimal intralobular connective tissue. The medullary areas appeared as small cones, with the apex facing the uteric bud and those oriented toward the cortex. Both the cortex and medulla were encapsulated containing abundant collagen fibers. The components of the cortical regions were compactly arranged, whereas the medullary components were loosely arranged. Renal corpuscles, including juxtamedullary and cortical renal corpuscles, were observed. The juxtamedullary corpuscles were larger and located in the cortical regions near to the medulla, while the cortical renal corpuscles were smaller, loopless, and appeared toward the periphery of the cortex. Central veins were observed, surrounded by proximal convoluted tubules (PCT) and distal convoluted tubules (DCT), creating a lobular pattern similar to that of the liver. The cortical tubules, medullary tubules, and the capsules of both cortex and medulla showed a positive reaction to the combined PAS-Alcian blue stain. The cortical capsule was moderately positive for acid Phosphatase and exhibited a strong reaction to alkaline phosphatase. The brush border and basement membrane of PCT displayed a moderate reaction to both acid and alkaline phosphatases. The DCTs were moderately positive for both enzymes. Additionally, the medullary capsule showed a moderate reaction to acid phosphatase and a strong reaction to alkaline phosphatase. The thin and thick segments of the medullary collecting ducts exhibited moderate reactions to both acid and alkaline phosphatases.
Eco-friendly Technology for the Management of Root-knot Nematode Meloidogyne incognita Infesting Noni (Morinda citrifolia L.) Plantation Under Field Conditions
Root-knot nematode Meloidogyne incognita (RKN), a key pest infecting noni (Morinda citrifolia) plantations cultivated as intercrop in coconut gardens in coastal states of India. One alternative to using nematicides to protect the affected crop is to plant marigold (Tegetes erecta) as an antagonistic crop to suppress nematode populations in infested soil. Therefore, field experiments were conducted with marigold seedlings planted in different numbers at noni tree basins to reduce RKN and minimize the plant mortality. The result indicated planting six marigold plants around the Noni tree basin from June to December suppressed the M. incognita population up to 89.7% with a significant increase in the number of branches (175%) and yield (264.6%) over control, indicating efficacy in managing the nematodes and also showing better plant vigor in coconut gardens. Moreover, the mortality rate of noni plants decreased from 22.07% to 3.9. The present finding confirms that planting of marigold plants around noni plant basins plays a significant role in the management of M. incognita infesting noni plantations cultivated intercropped in coconut gardens. These results would have the potential to develop comprehensive integrated plant parasitic nematode management strategies.