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 (2026)
30 Jun 2026 (Vol - 57 , Issue- 07 )
31 Jul 2026 (Vol - 57 , Issue 07 )
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
Studies on grain detachment force as affected by grain position and moisture content
Threshing force is the force required to detach the grains from the bundle of panicles during a threshing operation. For successful design of any threshing equipment, the knowledge of grain detachment force is essential. Therefore, this study was undertaken to determine the grain detachment force of paddy. The grain detachment force of six varieties of paddy, i.e., Lalat, Pratibha, Birupa, Pratikshya, Sidhanta, and Hasanta was determined using Universal Testing Machine. The grain detachment force of single grain was measured at three positions, i.e., lower, middle, and upper of panicles for each selected variety at four grain moisture content at 100 mm per min of test speed. The grain detachment force for the whole panicle of each variety was also determined at four speed (50, 100, 150 and 200 mm per min) and at four levels of moisture content. The highest grain detachment force was observed at the lower portion and the lowest at the upper portion of panicles for all the selected paddy varieties at all levels of grain moisture content. The detachment force decreased with decrease in grain moisture content for all the varieties. Grain detachment force decreased as the test speed increased from 50 to 150 mm/min but increased at 200 mm/min for all the varieties. The maximum detachment force was observed at the lower position of panicle at 17.8% moisture content for Sidhanta variety.
Influence of Design Parameters on Optimal Partial Transmission Ratios of a Helical Worm Gearbox
In this study, the main concern is estimating the effect of main design parameters on the optimal gear ratio (u2) of a helical worm gearbox. To solve that, a simulation experiment was designed and implemented by a cost optimization program. From the experimental results, the influence of the main design parameters and their interactions on the response u2 was evaluated. In addition, a useful regression model to calculate the optimum gear ratio was proposed based on the experiment data. It was reported that the regression formula is very fit with experimental data, and its use is easy because it is given in the form of an explicit function.
Effect of different varieties and fertility levels on growth, yield, Quality and nutrient uptake of hybrid rice cultivars (Oryza sativa) under subtropical irrigated conditions.
A field experiment was conducted during kharif season of 2014 at Sher-e- Kashmir University of Agricultural Sciences and Technology, research farm of division of agronomy Jammu to study the effect of different varieties and fertility levels on growth, yield, quality and nutrient uptake of hybrid rice cultivars under sub-tropical irrigated conditions. The experiment was laid out in Factorial Randomized Block Design with 16 treatments combinations and three replications. The treatments consisted of four varieties varieties V1 (PRH-10), V2 (DRRH-3), V3 (Indra Sona) and V4 (PHB-71) as one factor and four fertility levels F1 (N60:P30:K15 kg/ha); F2 (N90:P45:K23 kg/ha); F3 (N120:P60:K30 kg/ha) and F4 (N150:P75:K38 kg/ha) as second factor. Among hybrids, PHB-71 recorded significantly higher plant height, dry matter accumulation, number of panicles/m2, number of grains/panicle, 1000-grain weight, grain yield and straw yield. Application of N120:P60:K30 kg/ha and N150:P75:K38 kg/ha produced significantly higher plant height, dry matter accumulation, number of panicles/m2, number of grains/panicle, 1000-grain weight, grain yield and straw yield than N60:P30:K15 kg/ha and N90P45K23 kg/ha. The variety DRRH-3 recorded significantly higher protein content (8.57%) followed by PHB-71 and (PRH-10). However, being non-significant the variety DRRH-3 and fertility level F3 (N120P60K30 kg/ha) recorded highest starch content of (72.26%) and (72.76%) respectively. The variety PHB-71 has significantly higher nutrient uptake both in grain and straw followed by the variety DRRH-3, Indra Sona and PRH-10. The increase in nutrient uptake with F3 (N120P60K30 kg/ha) and F4 (N150P75K38 kg/ha) levels found to be superior over F1 (N60P30K15 kg/ha) and F2 (N90P45K23 kg/ha). The highest net returns (Rs 83514) and benefit: cost ratio (2.59) was recorded with PHB-71 followed by DRRH-3 (2.19). However, the highest net returns (Rs 78379) was obtained with N150P75K38 kg/ha followed by N120P60K30 kg/ha level whereas the B:C ratio (2.36) was higher in N120P60K30 kg/ha.
Effects of rising temperature and CO2 concentration on reference evapotranspiration and identification of significant governing meteorological variables in a semi-arid irrigated region
The present study was conducted to identify the key meteorological variables that have a significant effect on reference evapotranspiration (ET0) by using principal component analysis (PCA) and sensitivity method in a irrigated semi-arid region of North-West India (Karnal). Further, the climate change effect on ET0 was studied with the projected increase in temperature ranging from 1 to 5°C and CO2 concentration between 330 to 660 ppm. The investigation of PCA indicated that temperature and sunshine hours had greater linearity with ET0 with eigen values of 3.81, 3.70, and 3.18 in annual, summer, and winter periods, respectively. While, sensitivity analysis revealed that ET0 had significant variability with temperature, followed by sunshine hours, relative humidity, and wind speed. It was also found that changes in ET0 by increased temperature of 1 and 5°C is neglected the effect of 430 ppm and 660 ppm CO2 concentrations, respectively Hence, elevated temperature and CO2 concentration had opposite effects on ET0 and the combined effect of elevated CO2 and temperature contradicts the individual effect of each other on ET0.
Validation of copper oxy chloride and streptocycline against BLB of cluster bean incited by Xanthomonas campestris pv. cyamopsidis
Guar is an important dry land Kharif crops of Haryana and India is the largest cluster bean producer of the world with approximately 80 percent contribution in production. The crop surviving under harsh conditions is very sensitive to bacterial leaf blight incited by Xanthomonas campestris pv. Cyamopsidis causing devastating losses. Based on different technology developed for the management of this disease, first the premeditated effect of seed treatment was experienced for effect on disease appearance and germination parameters related to yield points. Seeds of cultivar HG 2-20 and HG 563 were also soaked in the streptocycline solution at different temperature regimes for different time intervals in vitro. The soaking duration of 30 minutes at 250C was optimum for seedling length and overall seedling vigour. In vivo, the lowest disease severity at 45 DAS was recorded when seeds were soaked in streptocycline solution for 30 minutes or more. The fungicides namely copper oxy chloride along with antibacterial streptocycline was tested at different concentrations on guar cultivar HG 2-20 at two locations through seed treatment and foliar applications during Kharif 2017 and 2018. At farmers’ field, lowest disease severity and higher benefit cost ratio was recorded in case of copper oxy chloride @ 0.2% and streptocycline @ 75 ppm with maximum increase in yield over untreated check.