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. Azerbaijan Medical Journal Gongcheng Kexue Yu Jishu/Advanced Engineering Science Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery Interventional Pulmonology Zhenkong Kexue yu Jishu Xuebao/Journal of Vacuum Science and Technology Wuhan Ligong Daxue Xuebao (Jiaotong Kexue Yu Gongcheng Ban)/Journal of Wuhan University of Technology (Transportation Science and Engineering) Zhonghua yi shi za zhi (Beijing, China : 1980)
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:
Soilless cultivation is a way to overcome the obstacles of continuous cropping, secondary salinization and other issues. Due to the weak buffering capacity of root microenvironment and high sensitivity for changes in the environment, the control of root zone temperature is difficult. A novel type of soilless culture facility was designed to solve the above problem, which was composed of soilless cultivation trough, cultivation bracket, water and sewer pipelines, and temperature control system. Three experiments were taken to test its control performance,1) By the experiment on temperature control performance test of flow water, it was validated that the designed soilless culture facility could control flow-through water temperature effectively and accurately 2) After finishing the experiment on temperature control performance test of culture substrate in cultivation tank, it could be verified that the novel soilless cultivation facility could control the temperature of culture substrate in cultivation tank accurately and effectively 3) The experiment on lettuce growth under the effect of root zone temperature control was done, which could prove that root zone temperature affects crop’s growth directly. Experimental results showed the practicality and the reasonability of the novel soilless culture facility and its root zone temperature control system.
The present study was conducted in Karnal, Rohtak and Jhajjar districts of Haryana state covering 360 respondents. Results showed that the respondents were from age group 36-50 years who belonged to general caste and educated up to middle school were married. They belonged to joint families and had small sized families having up to 4 members in a family with involvement in farming. The respondents had less than 2.5 acre of land which was fully irrigated and had owned pump/bore/tube well as irrigation source. They had pucca house with an annual income more than Rs. 2 lakhs and had more than 10 years of farming experience. Majority of the respondents had access and high utilization to mobile phone and internet.
Aiming at the current obstacles to the continuous cropping of facility vegetables and the serious damage of root-knot nematode diseases in the greenhouse vegetables. In this paper, a comprehensive equipment for reducing obstacles in continuous cropping of protected vegetable soil was developed. Through the theoretical calculation of soil subsoiling device, the component parameters of subsoiling device were obtained. Through the combination of empirical design and theoretical design, the design of key components of soil subsoiling device was determined, and the prototype trial production was completed. In order to deeply analyze the interaction process between blade and soil, a blade soil finite element model was established. The field test results of the prototype showed that the subsoiling depth of the machine was 390 ~ 410 mm, the average ditch depth was 395 mm, the stability coefficient of ditch depth was 98.3%, the average ditch width was 495 mm, and the consistency of ditch width was 98.5%, which basically meet the agronomic requirements. Through the comparison of soil compactness before and after operation, it could be found that after deep loosening, the soil was obviously loose, the soil hardness decreased, and the soil permeability was improved. The incidence rate of 40 days after transplanting was only 53.5%, which was 23.6% incidence rate compared with the reference area. At the same time, this paper could provide reference for the obstacle reduction of soil continuous cropping in orchards, mulberry orchards and tea orchards.
Mariculture provides an increasing seafood supply to a growing population. It also brings unintended consequences for the environment, resources and sustainable development. Based on observation of environmental changes in intensive mariculture of lobster cages in three south-central regions of Vietnam (namely Xuan Dai Bay, Van Phong Bay and Cam Ranh Bay, each region had two farming stations and one reference station), this paper aims to determine the impacts of mariculture to environmental quality over-period of April 2019 to May 2020. The results indicated no differences in water quality within the bay and among bays (p>0.05), but significant differences in sediment quality among stations (with and without mariculture) within the bays and among bays. The accumulation of observed parameters in substrate sediment at mariculture regions was higher than that without mariculture (p<0.05). Within the Cam Ranh Bay, the concentration of organic carbon, total nitrogen, and total phosphorus of the sediment near the cages increased by a factor of 1.4 compared with the reference. Similar results were also observed in the case of Van Phong Bay and Xuan Dai Bay with different magnitudes. Additionally, based on changes in sulfide concentration of substrate sediment, the sediment quality in Van Phong Bay would be better than two other bays This evidence demonstrated that mariculture wastes accumulated in the substrate sediment, and over time they decomposed and created sub-toxins that degraded substrate and affected benthic biota in coastal waters.
To improve the efficiency and quality of tree trunk liming, while reducing the labor intensity, this article outlines an automatic tree coating machine based on the cooperative functioning of multiple nozzles. This automatic tree coating machine detects the position, diameter, inclination and other parameters of the trunk through the use of an infrared distance meter and ultrasonic distance measuring instrument. This device can control the opening, closing angle, and moving speed of the spraying device through the servo motion mechanism achieving accurate spraying of trees. The results of tree spraying tests indicated that the average spray coverage rate can reach 97.73% in cases where tree trunks circumference are 50-80 cm and inclination angles are between 80-100°. The average spray coverage rate can reach 98.06% when tree trunk circumference is between 80-125 cm and inclination angles are 100-120°, the average spray coverage rate was 81.66% when tree trunks circumference are more than 125cm and inclination angles are 120-140°. The rate of spraying efficiency is 100-120 trees/hour, meeting the whitening requirements of trees and sufficient to replace manual operations.