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)
07 May 2026 (Vol - 57 , Issue- 05 )
31 May 2026 (Vol - 57 , Issue 05 )
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
Impact of pinching on yield and economics aspects of bottle gourd [Lagenaria siceraria (Mol.) Standl.]
A research experiment entitled “Impact of pinching on yield and economics aspects of bottle gourd [Lagenaria siceraria (Mol.) Standl.]” was conducted at Punjab Agricultural University - Vegetable Research Farm, Ludhiana and Regional Research Station, Abohar during kharif season, 2022. The experimental were laid out in randomized block design with three replications having nine pinching treatments at different nodes. Pinching treatment was given at main branch and lateral branches of bottle gourd vines in each plot according to the assigned treatments. The results revealed that pinched plants on main branch and lateral branches at 6th node remarkably significantly increased polar diameter of fruit (14.75 cm), equatorial diameter of fruit (13.76 cm), fruit weight (587.91 g), number of fruits per vine (7.23), early fruit yield per plot (14.17 kg), fruit yield (42.50 kg plot-1 and 566.7 q ha-1), harvest duration (68.03 days), overall B: C ratio (3.70:1) and least number of days to fruit harvest (61.97 days). Based on the outcomes presented above, it can be inferred that pinching on main branch and lateral branches at 6th node demonstrates superior results concerning the comprehensive yield aspects in bottle gourd.
Varietal evaluation of bulb-sets for physico-metrical traits in kharif onion (Allium cepa L.)
To stabilize onion prices throughout the year, cultivation of onion in rabi and kharif season is well accepted. It not only fulfills consumer demand but also provides high remuneration to onion farmers. Production of onion in kharif and late kharif season is a new strategy adopted to supply the fresh onion during November onwards. Recommendation of varieties and their successful cultivation was not done under sub-tropical conditions of Jammu though. Grading of bulbsets was done on the basis of sizes as Grade-1 (3.05cm), Grade-2 (2.55cm), Grade-3 (2.20cm) and Grade-4 (1.55). An investigation was carried out at Division of Vegetable Science, SKUAST-J, Chatha during 2018-2019 to evaluate kharif varieties developed through bulbsets of different sizes by sowing them on different dates. Bolting which started in the plants from the second week of January showed an increasing but non-significant trend among different grades of bulbsets. However, significant differences were found among the varieties with maximum percentage (26.48%) recorded in Selection-1 as compared to minimum (8.28%) in Bhima Red. Size of the bulbsets showed a significant trend as compared to varietal response. Grade-I (D1) showed statistically minimum days (15.50) for 50% sprouting as compared to other size of bulbsets with a maximum days (18.83) in Grade-IV of bulbsets (D4). Neck thickness was significantly influenced by varieties and dates of sowing but their interaction indicated non-significant results. N-53 recorded minimum neck thickness (0.95cm) whereas maximum thickness (1.40cm) was recorded in Selection-1. Large sized bulbsets recorded maximum neck thickness (1.28cm) as compared to small sized bulbsets (1.14cm). Selection-1 took maximum days (151.41) for marketable maturity while Bhima Red took minimum (125.58) days. Among the grades, bulbsets of Grade-IV (D 4) took maximum days (147.25) to maturity as compared to Grade-I (D1) which took minimum 134.50 days. However, non-significant results were recorded in the interaction. The maximum average bulb weight (117.13g) and total yield (449.03q/ha) was recorded in Grade-I (D1) of Bhima Red, sown on 1st February. Significantly maximum marketable bulb yield of 409.14q/ha was obtained in Grade-I of Bhima Red, giving highest cost benefit ratio of 1:3.55.Lowest marketable bulb yield of 174.55q/ha with cost benefit ratio 1:0.95 was observed in Grade-IV of Selection-1.
Temporal Variations in Nutrient Content of Grape Petioles and Berries during the Growing Season: Insights into Macronutrients and Micronutrients Source to Sink Dynamics.
This study investigated the variation in nutrient content in grape petioles and berries throughout the growing season. The results showed that the mean nitrogen (N) content in petioles ranged from 0.67% to 1.37% and exhibited a decline over the sampling period. Anab-e-Shahi cultivar had higher N levels compared to Perlette. Petiole N showed a positive correlation with phosphorus (P) and potassium (K). Similar periodic fluctuations in petiole N content were observed in other grape cultivars. The mean P content varied from 0.12% to 0.34% and showed a non-significant decrease during early growth stages and a subsequent increase. Petiole P exhibited positive correlations with K and N. The K content increased initially and then decreased throughout the season, with Perlette having higher levels than Anab-e-Shahi. Petiole K showed positive correlations with N and P. The calcium (Ca) content increased gradually, while magnesium (Mg) showed an overall increase from D1 to D9. Boron (B) increased initially and then decreased towards the end of the season. While comparing nutrient status in both leaves and fruits from D6 to D8 macronutrients show maximum flow from source to sink. In case of Nitrogen D6 showed maximum decrease in N in leaves and increase in fruits which means maximum source to sink is in D6 and majority of macro nutrients show similar behavior, while as in case of micronutrients initial stages D5 onwards source to sink gets decreased hence micronutrient sprays should be recommended at initial stages hence nutrient sprays are recommended during these stages for maximum uptake of nutrients from leaves to berries for maximum nutrient fortification in berries. These findings emphasize the importance of considering specific reference levels for each phenological stage and highlight the dynamic nature of nutrient content in grapevine growth and development.
Development and Validation of a Specific PCR Protocol for Detecting Bacterial leaf Spot Xanthomonads in Tomato and Pepper.
Advancements in molecular technology have revolutionized the detection of phytopathogenic bacteria, with specific amplification of target DNA fragments emerging as a powerful approach, especially for quarantine bacteria. Current conventional PCR protocols for Bacterial Leaf Spot (BLS) xanthomonads primarily focus on species differentiation or the detection of specific species, lacking a comprehensive and validated method for all BLS xanthomonad lineages. The conventional PCR protocol optimized with designed newly primer pair Bs LepA F/ Bs LepA F followed by validation for specificity and sensitivity assays conducted in this study. The protocol was validated using target BLS Xanthomonas strains from major tomato-growing regions in India and non-target bacterial strains belongs to different genus. The detection assays from pure bacterial suspension and threshold detection efficiency from artificially infected leaf samples demonstrating high specificity and sensitivity. Furthermore, the protocol's effectiveness to detect naturally infected plant samples and multiplex with other tomato bacterial pathogens make it a significant tool for agricultural disease control. This research advances molecular detection techniques and provides practical solutions for early identification and management of BLS xanthomonads, protecting tomato and pepper crops from this destructive disease.
Exploring Genetic Influences on Seed Morphological Traits in Wheat: A Genome-Wide Association Study under Moisture Deficit Stress and Well-Watered Conditions
Moisture deficit stress is a major environmental factor affecting crop productivity, including wheat, one of the world's most vital staple crops. Understanding the genetic basis of seed morphological traits under moisture deficit stress condition is essential for developing climate-resilient wheat cultivars. We used 193 wheat genotypic panel and 35,143 genetic markers to assess seven seed morphological traits, including area size, perimeter length, seed length, seed width, circularity of seed, length-to-width ratio and the distance between the intersection of length and width of seed and the centre of gravity. We also measured the thousand seed weight as a quality trait. Our findings revealed 37 associations between markers and these seed traits across 18 chromosomes. Remarkably 26 of these associations explained the 10% of the phenotypic variation in the traits under moisture stress conditions. These marker-trait associations reveal genes responsive to moisture deficit stress, offering promise for developing climate-resilient wheat varieties. The genomic regions linked to these traits could be utilized for marker-assisted selection, ultimately boosting wheat productivity in challenging climates.