Engenharia Agricola最新文献

TECHNICAL AND ECONOMIC FEASIBILITY OF OFF-GRID PHOTOVOLTAIC SYSTEMS FOR IRRIGATION 离网光伏灌溉系统的技术经济可行性

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-08-21 DOI: 10.1590/1809-4430-eng.agric.v43n3e20210168/2023

J. Bruning, A. D. Robaina, M. X. Peiter, Miguel Chaiben Neto, S. A. Rodrigues

引用次数: 0

EFFECT OF RICE STUBBLE ON SOIL COMPACTION PROPERTIES OF A CRAWLER UNDERGOING COMBINE HARVESTER HARVESTING 水稻残茬对履带联合收割机土壤压实特性的影响

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-08-04 DOI: 10.1590/1809-4430-eng.agric.v43n3e20230057/2023

Sifan Liu, Zhongru Tang, Cheng Shen, Ting Wang, Yaquan Liang

引用次数: 0

EFFECT OF CONSTANT VOLUME STRUCTURE PARAMETERS ON GRAIN VENTILATION DRYING 定容结构参数对粮食通风干燥的影响

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-08-01 DOI: 10.1590/1809-4430-eng.agric.v43n3e20200037/2023

Xingzao Ma, Danna Zheng, Zhuangdong Fang

{"title":"EFFECT OF CONSTANT VOLUME STRUCTURE PARAMETERS ON GRAIN VENTILATION DRYING","authors":"Xingzao Ma, Danna Zheng, Zhuangdong Fang","doi":"10.1590/1809-4430-eng.agric.v43n3e20200037/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n3e20200037/2023","url":null,"abstract":"The structural parameters of a grain dryer are directly related to the its energy consumption and quality formation. Therefore, based on the Ergun model, air state parameters and uniformity evaluation method, the effect of changes in the ventilation area on grain airflow resistance, drying energy consumption, drying efficiency and uniformity are theoretically and experimentally studied in this work under the same initial grain weight and air flux. The results show that under the conditions of air temperatures 35 ℃ and 70 ℃ , the weight of paddy 8.547 kg and the air flux 12.3 m 3 ·h -1 , hot air introduced into the drying chamber with cross-sectional areas of S1 and S2 respectively, the ventilation area enlarged by 2.328 times, the grain airflow resistance decreased by 7.17 and 6.99 times. Enlarging the ventilation area effectively improved the drying rate of paddy, especially at 70 ℃ , while the unit energy consumption was the opposite. It also accelerated the moving speed of the saturated humidity line in the drying layer and improved the drying uniformity of the paddy. These experimental results","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

THE INFLUENCE OF SEED VARIETY AND HIGH SEEDING SPEED ON PNEUMATIC PRECISION SEED METERING 种子品种和播速对气动精密排种的影响

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-07-10 DOI: 10.1590/1809-4430-eng.agric.v43n3e20220183/2023

Chao Wang, Hanyu Yang, Jin He, Kexin Kang, Hongwen Li

引用次数: 0

INTELLIGENT AUTOMATED MONITORING INTEGRATED WITH ANIMAL PRODUCTION FACILITIES 与动物生产设施集成的智能自动化监控

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-07-10 DOI: 10.1590/1809-4430-eng.agric.v43n2e20220225/2023

R. C. Santos, André L. N. Lopes, A. C. Sanches, E. P. Gomes, Edlaine A. S. da Silva, Jhon L. B. da Silva

{"title":"INTELLIGENT AUTOMATED MONITORING INTEGRATED WITH ANIMAL PRODUCTION FACILITIES","authors":"R. C. Santos, André L. N. Lopes, A. C. Sanches, E. P. Gomes, Edlaine A. S. da Silva, Jhon L. B. da Silva","doi":"10.1590/1809-4430-eng.agric.v43n2e20220225/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n2e20220225/2023","url":null,"abstract":"Increasing population and demand for animal-derived products has raised the need for improved efficiency in managing and controlling animal production. Given this context, the project aimed to develop a device that aids decision-making in animal production. A hardware system was designed for instant measurement of thermal well-being levels, light intensity, and air gas concentration. This hardware integrated DHT11 sensors, an LDR photoresistor, and an MQ-135 sensor. To validate the system, a 30-day experimental study was conducted in an industrial pig farming setting. The collected data was sent to the Thingspeak server using the HTTP protocol. Data management, filtering, and organization were optimized using developed treatment algorithms. The system presented information on air humidity, temperature, ammonia concentration, CO 2 levels, luminosity, and enthalpy through interactive images on a dashboard. In the case of a risk situation, the system automatically notified users with an \"ALERT\" message, facilitating prompt and efficient management response, and minimizing losses. The sensor calibration process yielded a high coefficient of determination (r² = 0.98). Thus, the developed IoT device represents a viable solution, providing precise environmental conditions to support producers and enhance their efficiency and sustainability.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

EFFECT OF AERATED IRRIGATION ON SOIL MICROENVIRONMENT AND COTTON GROWTH PROMOTION 曝气灌溉对土壤微环境及棉花生长的影响

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-07-03 DOI: 10.1590/1809-4430-eng.agric.v43n2e20220129/2023

Qin Zhou, Yu Bai, Zhongping Chai, Jianghui Zhang, Ming Zheng

引用次数: 0

A ROTARY BLADE DESIGN FOR PADDY FIELDS WITH LONG RICE STRAW BASED ON EDEM 一种基于dem的长秆稻田旋转叶片设计

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-07-01 DOI: 10.1590/1809-4430-eng.agric.v43n3e20220062/2023

Chengcheng Ma, Shujuan Yi, Guixiang Tao

{"title":"A ROTARY BLADE DESIGN FOR PADDY FIELDS WITH LONG RICE STRAW BASED ON EDEM","authors":"Chengcheng Ma, Shujuan Yi, Guixiang Tao","doi":"10.1590/1809-4430-eng.agric.v43n3e20220062/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n3e20220062/2023","url":null,"abstract":"The paddy field machine uses excessive power during paddy field preparation because of the high distribution density of rice straw. In this study, a rotary blade is created to address this problem. The structural parameters of the rotary blade were designed and the dynamic analysis of the rotary blade's soil-cutting process was completed to establish a model of the rotary blade's power consumption. Through the model, the primary factors influencing the rotary blade's power consumption were identified. A composite soil bin model of rice straw‒muddy layer‒bottom soil was established in EDEM software, with the bending angle of the front blade, the working width of a single blade, and the thickness of the blade as the test factors. The straw burying rate, power consumption, and surface flatness after rotary tillage were used as evaluation indicators to conduct multi-factor simulation tests on the composite soil bin model. The optimized analysis of the test data showed that the optimal geometric parameters for the rotary blade were 49 mm working width, 108° front blade bending angle, and 4 mm blade thickness. A field verification test was carried out on the optimized rotary blade, and the test results showed that the surface flatness after rotary tillage was 3.25 cm, the qualified rate of rotary tillage depth was 93.3%, and the degree of mud mixing was 3.41 kg/dm 3 , which was suitable for the land preparation requirements of paddy fields.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"31 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257497","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A THEORETICAL ANALYSIS AND EXPERIMENTAL STUDY OF A COUPLED SCREW-PNEUMATIC CONVEYOR FOR CHOPPED CORNSTALKS 玉米秸秆切碎螺旋-气动耦合输送机的理论分析与实验研究

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-07-01 DOI: 10.1590/1809-4430-eng.agric.v43n3e20220068/2023

Wulantuya, Nanding Li, Hongbo Wang, Zhipeng Fan, Chunguang Wang, Lin Qing

{"title":"A THEORETICAL ANALYSIS AND EXPERIMENTAL STUDY OF A COUPLED SCREW-PNEUMATIC CONVEYOR FOR CHOPPED CORNSTALKS","authors":"Wulantuya, Nanding Li, Hongbo Wang, Zhipeng Fan, Chunguang Wang, Lin Qing","doi":"10.1590/1809-4430-eng.agric.v43n3e20220068/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n3e20220068/2023","url":null,"abstract":"Various problems are encountered during the screw feeding process of chopped cornstalk. Therefore, it is important to deeply analyze and understand the relationship between conditions and productivity of screw conveyors. This study reveals the influence of air velocity, pitch, rotational speed, and feeding rate on productivity, power consumption, specific power consumption and pressure of material for a coupled screw-pneumatic conveyor. Through a theoretical analysis, a mathematical model is established that simultaneously considers the compression characteristics of the material, material pressure from the change in pitch and centrifugal force of the screw axis, productivity of the coupled screw-pneumatic conveyor, power consumption and specific power consumption. Then, experiments are conducted to investigate the influence of the structural and working parameters of the conveyor on its performance. Finally, the correctness of the theoretical calculation is verified through a comparison with experimental results. The results of the theoretical","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EFFECT OF DIFFERENT NITROGEN FERTILIZATION RATES ON THE SPECTRAL RESPONSE OF Brachiaria brizantha cv. MARANDÚ LEAVES 不同施氮量对briachiaria brizzantha cv光谱响应的影响。MARANDU叶子

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-07-01 DOI: 10.1590/1809-4430-eng.agric.v43n3e20220008/2023

Matheus S. Nilsson, P. Fiorio, Mitsuhiko R. H. Takushi, Ana K. da S. Oliveira, Amparo C. Garcia

引用次数: 0

ANALYSIS AND EXPERIMENTATION OF THE CRUSHING AND SEPARATION PROCESS OF THE ROOT-SAND COMPLEX OF HARVESTED AND EXCAVATED Cyperus esculentus L. IN DESERTS 荒漠采掘沙柏根沙复合体破碎分离过程分析与试验

IF 1 4区农林科学

Engenharia Agricola Pub Date : 2023-07-01 DOI: 10.1590/1809-4430-eng.agric.v43n3e20220121/2023

Minghao Pei, Shiguan An, Shen Chen, Jiangtao Qi, Yaping Li

{"title":"ANALYSIS AND EXPERIMENTATION OF THE CRUSHING AND SEPARATION PROCESS OF THE ROOT-SAND COMPLEX OF HARVESTED AND EXCAVATED Cyperus esculentus L. IN DESERTS","authors":"Minghao Pei, Shiguan An, Shen Chen, Jiangtao Qi, Yaping Li","doi":"10.1590/1809-4430-eng.agric.v43n3e20220121/2023","DOIUrl":"https://doi.org/10.1590/1809-4430-eng.agric.v43n3e20220121/2023","url":null,"abstract":"The aim of this study is to simplify the difficult excavation that is caused by the root-sand complex in the process of harvesting Cyperus esculentus in the desert of Xinjiang by performing mechanical tests and analysis of the interaction between the vibrating excavation shovel and the rotary blade on the root-sand complex. The rotary blade number, rotary blade speed and digging depth were used as the test parameters, and the Cyperus esculentus breakage rate, root-grass crushing rate, and soil carrying rate were used as the test indicators. The characteristics of the influence of various factors and their interaction on the crushing and separation of the root-sand complex were explored. A parameter combination optimization model is verified by experimental data. The test results showed that the optimal combination was as follows: the number of rotary blades was 20, the rotational speed of the rotary blade was 373 r/min, and the digging depth was 12 cm. At this time, the Cyperus esculentus breakage rate, root-grass crushing rate, and soil carrying rate were 2.62%, 63.68% and 55.40%, respectively. This study can support the development of a Cyperus esculentus harvester suitable for deserts in Xinjiang.","PeriodicalId":49078,"journal":{"name":"Engenharia Agricola","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67257569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0