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.
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: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
The purpose of this paper is to study the problems existing in dry anaerobic digestion of organic household waste and to provide theoretical basis for follow-up research. A study on medium temperature dry anaerobic digestion of simulated organic household waste was carried out in Datun Street, Peixian County, Xuzhou, Jiangsu Province, the experimental period was 60 d. On the tenth day of digestion, the concentration of ammonia nitrogen reached 1183.30 mg·L-1, and the concentration of ammonia nitrogen was as high as 4923.12mg·L-1 finally. Due to the high nitrogen content and total solid content of digestion substrate, serious acidification and ammonia nitrogen inhibition occurred in the digestion system, resulting in low methane content which the maximum only 30%. The cumulative biogas production could reach 361.68 L·kgVS-1, while the cumulative methane production was only 44.73 L·kgVS-1. The results of high-throughput sequencing showed that the digeston process was single in the bacteria and archaea, which explained one of the reasons for the serious inhibition of ammonia nitrogen.
Wheat crop plays a vital role in the cereal crops to ensure the food security of India. In the high-yielding wheat production systems of Northwest (NW) Indo-Gangetic Plains of India (IGP), intensive tillage operations and burning or removing crop residue have led to high production costs, decreased farm productivity and profitability. Therefore, a field experiment was conducted to evaluate the effect of mechanical cultivation (tillage and crop establishment) and different crop residues on the growth, yields and economics of wheat at CIMMYT- CSSRI Research platform Karnal, India. The scenarios were included; Sc1- conventional tillage (CT) wheat without residue (-R); Sc2- Zero tillage wheat (ZTW) with rice residue (+R); Sc3- ZTW with full rice residue (+R); Sc4- Wheat on permanent beds (PBs) with partial maize residue (+R); Sc5- Wheat on PBs with partial soybean residue (+R); Sc6- Wheat on PBs with partial pigeonpea residue (+R). Compared to farmer practice (Sc1), CA-based management practices (Sc2 to Sc6) significantly improved the crop productivity, profitability and quality parameters. Based on 2' years mean, yield and net returns of varied management scenarios were increased by 11.4, 10.7, 7.2, 2.6 and 1.1 % and 17.4, 16.1, 13.6, 8.9 and 7.2% under Sc2, Sc3, Sc4, Sc5 and Sc6, respectively compared to Sc1 (farmers’ practice). Overall, CA-based management practices (mean of Sc2-Sc6) increased the yield by ~7%, net return by 13%, sedimentation value by 7%, gluten content by 22%, falling number by 6% and 20% reduce cost of cultivation compared to Sc1. Results suggest that CA-based management practices can increase yield, profitability and quality from wheat production in NW India.
A research trial was conducted with different management interventions related to tillage, crop establishment, residue, nutrient and water management to enhance the adaptive capacity of wheat for getting higher crop growth, yield, profitability and nitrogen use efficiency in north-west India. Zero tillage wheat (ZTW) with residue (+R) under subsurface drip irrigation (SDI) improved the growth and yield attributes i.e. plant population, plant height, dry matter accumulation, grains per spike and 1000-grain weight over the conventional practices (CT) with and without residue (-R and +R) under flood irrigation (FI). ZTW+R+SDI improved productive tillers by 18% and protein content by 9.6% compared to CTW-R+FI. On 2-years mean, ZT+SDI treatment recorded 24.1% higher crop productivity and saved 8.6% of N fertilizer and improved the profitability by 51.5% compared to CTW-R+FI. ZTW with FI also improved productivity and profitability by 8.3 and 45.5%, respectively compared to farmer’s practice (CTW-R+FI).
This study evaluated energy requirements, gross energy output and energetic indices under different rice establishment methods and nitrogen management practices under rice-rice cropping system. The energy input in normal transplanting (M1) was 3.85 and 3.90 per cent higher than mechanized SRI (M2) during 2017 and 2018, respectively. There was no significant difference in gross energy output, net energy productivity, energy use efficiency, net energy returns and specific energy requirement due to establishment methods. Mechanized SRI recorded significantly higher energy intensity in economic terms (3.13 and 2.93 MJ ₹-1) as compared to normal transplanting (2.71 and 2.56 MJ ₹-1) during 2017 and 2018, respectively. Application of nitrogen as per recommendation of Nutrient Expert with NCU (N1) recorded higher energy input. Application of nitrogen as per recommendation of Nutrient Expert with NCU (75%) + VC (25%) (N2) recorded significantly higher gross energy output and net energy return as compared to nitrogen omission (N5) and absolute control (N6). Application of nitrogen as per recommendation of Nutrient Expert with NCU (75%) + VC (25%) (N2) recorded significantly higher energy use efficiency (EUE) and energy productivity (EP) than all other nitrogen management practices except recommended doses of nitrogen with NCU (75%) + VC (25%) (N4). Absolute control (N6) required significantly higher specific energy. Application of nitrogen as per recommendation of Nutrient Expert with NCU (N1) recorded significantly higher energy intensity in economic terms over nitrogen omission (N5) and absolute control (N6).
A field experiment was conducted on loamy sand soil at the Rajasthan Agricultural Research Institute (SKNAU, Jobner), Durgapura, Jaipur, during two consecutive kharif seasons in 2019 and 2020. The investigation consist of two pearl millet varieties (RHB-173 and RHB-177), transplanting shock preventing methods (No treatment, Triacontanol @ 0.25 ml/litre, Triacontanol @ 0.50 ml/litre and Leaf clipping) and three dates of transplanting (15th June–30th June, 1st July–15th July, and 16th July–31st July) were replicated thrice in factorial randomized block design. Results revealed that the nutrients concentration in grain and stover of pearl millet were merely affected by both doses of triacontanol i.e. 0.25 and 0.50 ml/litre and their total uptake altered by all the experimental variables during individual year of study. The pearl millet cultivar RHB-173 recorded significantly higher grain yield over RHB-177. Among the transplanting shock preventing methods, triacontanol @ 0.50 ml/litre observed statically superior in increasing grain yield of pearl millet as compared to no treatment and leaf clipping, but it was found at par with triacontanol @ 0.25 ml/litre during each year of investigation. The crop transplanted during 1st July to 15th July noted significantly higher grain yield over 1st June to 15th June, however it was found at par with later (16th July- 31st July) transplanted crop.