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. Shenyang Jianzhu Daxue Xuebao (Ziran Kexue Ban)/Journal of Shenyang Jianzhu University (Natural Science) General Medicine (ISSN:1311-1817) Chinese Journal of Evidence-Based Medicine Zhongguo yi liao qi xie za zhi = Chinese journal of medical instrumentation Lizi Jiaohuan Yu Xifu/Ion Exchange and Adsorption Kexue Tongbao/Chinese Science Bulletin Dalian Haishi Daxue Xuebao/Journal of Dalian Maritime University
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:
As a non-linear resistor with memory characteristics, the memristor plays an important role in areas such as image processing, pattern recognition, secure communication and intelligent systems due to its non-volatile storage and variable resistance. Currently, the research of memristor in memristive neuromorphic circuit is becoming more and more mature, but its application to the real-time control system needs to be improved. This study focuses on the proportional-integral-differential (PID) controller and combines the memristor with it to design a Memristive PID (M-PID) control system that can be used for the real-time control system. First, the Time-division Multiplexing (TDM) is used to separate the control system working circuit signal from the memristor trigger circuit signal, which can effectively avoid mutual interference between high frequency and low frequency signals. Second, using the Metal-Oxide-Semiconductor (MOS) transistor's own switching threshold, a threshold memristor control circuit with a “zero state” interval is designed, which can effectively avoid system oscillation caused by frequent switching of the PID controller. Third, a memristor forced read/write mode is proposed, which improves the lifetime of the memristor and simplifies the memristor control circuit. Using MATLAB simulation software, a second-order system is selected as the controlled object, and the proposed scheme is simulated and verified. The results show that the proposed scheme is reasonable and feasible, and can provide certain technical support for the commercial application of the memristor.
The agriculture system is under pressure due to climate change and its hurdle in achieving food, income, and environmental security with increasing rate of population. For this context it needs to improve the crop productivity per unit area through using available space vertically and horizontally along with other natural resources. Arecanut based cropping system (ABCS) is a perspective modern and alternative approach for sustainable productivity in horticultural crops for 85% small and marginal farming community of the North Eastern part of the country, not only providing greater economic return also playing better role in sustainable land use management and in better climate change mitigation through sequestering atmospheric CO2 in terrestrial ecosystem. Integration of different intercrops of annual and perennial nature were made for effective utilization of 70% left over land area and 40% of the incident solar radiation penetrating down within the canopy of the plantation. Various component crops of different ABCS models with their diverse carbon sequestration potential ultimately resulted into distinct total CO2 sequestered by one hectare model with different crop combination ranging from 280.77 to 313.96 t/ ha having lowest value under mono cropping situation with only arecanut (248.31 t/ha). The findings of the present study proved the weakness of monocropping and dictate towards adoption of high-density cropping system not only in terms of economic feasibility of the small and marginal farmers of North Eastern parts of West Bengal but also mitigating environmental issue related to emission of greenhouse gases. Economic assessment in different ABCD contributed better economic return.
This study characterized thirty-five rice landraces and six checks for agro-morphological traits associated with yield, conducted at the College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University, Meghalaya during the kharif season of 2022. Traits such as Days to 50 % flowering (DTF), Filled grain per plant (FGPP), Plant height (PH), Panicle Length (PL), Panicle number (PN), Plot yield (PY), Spikelet Fertility (SF) and Spikelet per panicle (SPP) were evaluated using Augmented Randomized Complete Block Design. Analysis revealed significant differences among treatments, checks, and treatment vs. check for all traits. Moderate genetic variability was observed, emphasizing the need for further improvement through hybridization and selective breeding. High heritability coupled with genetic advance highlighted the role of additive gene effects. Correlation analysis identified positive relationships between yield and traits viz FGPP, PL, PN, and SPP. Principal Component Analysis and cluster analysis aided in grouping landraces based on traits, offering valuable insights for future breeding programs. The study contributes essential information for identifying and selecting promising landraces for improving rice yield.
To understand the impact of varieties and their biochemical parameters on pod damage in pigeon pea, the field experiments were conducted to evaluate thirteen pigeon pea varieties at Bidhan Chandra Krishi Viswavidyalaya, Kalyani, West Bengal, India. The experiment was laid out in randomized block design with three replications. Fifty pods had been harvested for recording pod damage by borer complex at three developmental stages of pod viz. pod formation, pod filling and pod maturity. Results revealed that among the tested varieties, MA6, Pusa 9, Pusa 991, CORG 9701 recorded lower pod damage in comparison to the other varieties. Pod damage caused by Helicoverpa armigera on MA6, Pusa 9, Pusa 991 and CORG 9701 were recorded from 2.35 to 2.82%, 7.33 to 9.07% and 15.82 to 19.55% at pod formation, pod filling and pod maturity stages, respectively whereas the corresponding values for Melanagromyza obtusa were 13.01 to 18.85%, 23.03 to 31.30% and 26.73 to 36.84%, respectively. It was evident from the regression studies that the Helicoverpa population can be explained by total seed protein content up to 87.4 % whereas for pod fly protein content can explain the average population up to 82.2 %. The total seed phenol content can explain the Helicoverpa population up to 83.60 % whereas the same can be explained up to 68.8% for pod fly. The seed protein content was directly proportional and seed phenol content was inversely proportional with the average population of all insect pests.
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.