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)
07 Dec 2025 (Vol - 56 , Issue- 12 )
31 Dec 2025 (Vol - 56 , Issue 12 )
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 experiment of impeller seed guide device for rice internal suction hole direct seeding device
Multi-grain hole-forming sowing and uniform hole spacing are important agronomic requirements for precise hole-direct seeding of rice. However, the traditional tubular seed-guiding device has problems such as poor hole-forming ability and large coefficient of variation of hole spacing in multi-grain hole-forming direct seeding of rice, especially for the internal suction seed-metering device with high-position seeding. Based on the structural characteristics of the suction component of the internal suction seed-metering device, this paper innovatively designs a kind of impeller type seed guiding device. The main structural parameters of the impeller seed guide device were analyzed by constructing the kinematics model of the rice seed in the impeller seed guide process. Taking the long-grain rice variety Chuangliangyou 4418 as the seeding object, the effects of inner impeller radius, blade offset angle and seeding angle on the hole-forming and seeding-guiding performance of impeller seeding-guiding device were studied by bench seeding test. The optimal structural parameter combination of seeding-guiding device was determined as inner impeller radius 56 mm, blade offset angle 11 ° and seeding angle 36 °. On this basis, the seeding performance test of different seed guiding devices of internal suction seed-metering device was carried out by using rice seeds with different external dimensions. The test results show that the impeller has better cavitation and hole spacing uniformity than the seed guide tube. The average hole diameter is not higher than 21.7 mm, the qualified rate of hole diameter is not lower than 96.1 %, and the coefficient of variation of hole spacing is not higher than 10.1 %. Compared with the seed guide tube, which is increased by 32 %, 16 % and 34 % respectively, And the average hole distance is about 200 mm in theory. The impeller seed guiding device proposed in this paper can improve the problem of poor performance of fixed-distance multi-grain hill-seeding in the tubular seed guiding device, and meet the seeding requirements of precision hole-direct seeding of rice. It provides a theoretical reference for the design of seed guiding device for one-hole multi-grain hole-direct seeding crop.
Evaluation of Pigeonpea (Cajanus cajan L.) genotypes for seed quality traits and seed health status during storage in Prayagraj region (U.P.)
The experiment was conducted during 2019–2020 at SHUATS, Prayagraj, with 17 genotypes of pigeonpea and one control variety (encoded with G1 to G17) taken from IIPR, Kanpur (U.P.). Prior to storage, the seeds were treated with mustard oil (T1) and carbendazim (T2) and stored for up to twelve months. The untreated seeds (T0) were used as the control. Under controlled laboratory conditions, 51 treatment combinations were tested using a Complete Randomized Block Design (CRD) with 4 replications for seed quality attributes and seed health status during storage (6 and 12 months, respectively). After the storage period, seeds were evaluated in terms of their qualitative attributes and health status. The highest percentage of germination, seedling parameters, vigour indices, and a low incidence of disease were determined by the mean sum of squares of treatment combination T47 (T2G13), which demonstrated significant differences for the given characteristics under this investigation at the 5% level of significance. The loss of seed (Vigour, Viability, and Nutrients) during storage is a serious problem due to infection and deterioration, which results in low germination, poor health, and poor seed set/production. This phenomenon can be checked & stopped at a certain level by various treatments that prevent seed deterioration. The study revealed that mustard oil had little influence on quality attributes and seed health, whereas carbendazim had the greatest effect on all of these characteristics.
Impact of land use and altitudinal gradient on soil enzymatic activity in the Eastern Himalayan region of West Bengal
Understanding the impact of land-use change after the conversion of natural forests is imperative for understanding soil biological activity and devising sustainable land management strategies. Nevertheless, little is known about the effect of land use alterations along the elevation on soil enzyme activity, particularly in the specific context of the Eastern Himalayan region. We selected six major land use systems (LU1 = open crop fields, LU2 = mandarin orchards, LU3 = large cardamom agroforestry, LU4 = ginger-based agroforestry, LU5 = tea plantations and LU6 = undistributed forests) across four elevational gradients (A1 = 400 - 500 m, A2 = 900 - 1000 m, A3 = 1400 - 1500 m and A4 = 1900 - 2000 m) in such a way that all six land use practices fall in every elevation gradient in the Eastern Himalayan region of West Bengal. The study revealed substantial variations in acid phosphatase activity across the land use systems, with the highest to lowest levels observed as follows: LU6 > LU5 > LU4 ≈ LU3 > LU2 > LU1. Whereas, dehydrogenase and β-glucosidase varied in the following order: LU6 > LU4 ≈ LU3> LU5 > LU2 > LU1. Altitudinal gradients had a positive influence on enzymatic response, indicating elevated enzymatic activity with increasing elevation up to A4. A redundancy analysis study showed that soil enzyme activity is driven by soil organic carbon, dissolved organic carbon, available nitrogen, and pH. The research underscores the intricate dynamics of soil enzymes, emphasizing the need to consider both land use and altitude for comprehensive soil health assessments and sustainable land management practices in the Eastern Himalayas.
AN ECONOMIC ANALYSIS OF WHEAT BASED CROPPING SYSTEMS IN BHABHAR REGION OF UTTARAKHAND
Wheat based cropping system is one of the major cropping system of India responsible for meeting food requirement of the millions. Wheat (Triticum aestivum L.) is one of the leading cereal crop among all the food grains for the majority of the country’s population. India is the second largest producer of wheat. The present study was conducted in Nainital district in Uttarakhand. The state ranks at ninth place in the country in terms of Wheat production. Wheat is the most dominant crop of Nainital district yet it produces only 7.95 percent (0.07 million tonnes) of the total wheat production in Uttarakhand. Primary data used in the study was collected from 90 sample farmers. Three major cropping systems namely, CS I (Rice-Wheat), CS II (Maize-Wheat), CS III (Soybean-Wheat) were taken for the study. The study aimed to examine the socio-economic status, resource use efficiency of wheat based cropping systems and constraints faced by the sample farmers. Average size of cultivated land was 1.13 ha. The value of MVP/MIC for seeds (2.008), FYM (1.828), PPC (4.474), machine power (1.004) came out to be greater than unity indicated under utilization of these resources for the CS I. In CS II the value of MVP/MIC for fertilizers (-2.501) and machine power (-2.847) were less than unity implies that these resources were over utilized. However, for FYM and PPC value of MVP/MIC came out to be 7.313 and 9.973. In case of CS III seeds (28.80), FYM (5.59), PPC (4.35) and machine power (1.41) values MVP/MIC came out to be greater than unity indicated the under utilization of these resources. While, in case of irrigation (-26.50) it was less than unity revealed the over utilization of resources. The study revealed that problems of rats and rodents, pest and disease attack, high machinery cost, problem of wild animals were major constraints faced by the sample farmers.
Assessment of Profitability and Sustainability in Integrated Farming Systems: A Case Study in Meghalaya, India
This comprehensive study delves into the intricate dynamics of three Integrated Farming System (IFS) models implemented in the Ri-Bhoi District of Meghalaya, India, focusing on Marngar and Sarikhusi villager clusters under the Farmers' First Programme (FFP). Spanning the years 2017 to 2023, these models, designated as IFS I, IFS II, and IFS III, integrate various agricultural enterprises, including fishery, poultry, piggery, dairy, crops, goatery, and mushroom farming. The results reveal a remarkable transformation in the economic landscape for small and marginal farmers adopting these IFS models. In the case of IFS I, covering a 2.47-acre farm, the annual gross income surged from Rs. 1.73 lakhs to an impressive Rs. 6.23 lakhs post-intervention. IFS II, operating on a 1.4-acre farm, showcased the effectiveness of integrating diverse enterprises. The model, incorporating piggery, fishery, poultry, duckery, crops, goatery, and mushroom farming, demonstrated a commendable average annual gross income of Rs. 3.60 lakhs. In the case of IFS III, which encompassed crops, fishery, poultry, and piggery on a 1.10-acre farm, the results indicated an almost twofold increase in annual gross income compared to the baseline. The benefit-cost ratio for IFS III was calculated at 2.38, affirming its profitability. The implications of these findings extend beyond the specific regions studied. Policymakers and agricultural extension services can leverage these insights to design and implement similar interventions in diverse agro-ecological contexts, aiming to promote sustainable agricultural practices. The success of these IFS models suggests a scalable and replicable approach that could contribute to holistic agricultural development and poverty alleviation in various rural settings.