Engenharia na Agricultura最新文献_第9页

COMPUTATIONAL TOOL FOR SELECTION AND RANKING OF PULL-TYPE FORAGE HARVESTERS 牵引式牧草收割机的选择与排序计算工具

Engenharia na Agricultura Pub Date : 2021-01-01 DOI: 10.13083/reveng.v29i1.10573

Daniel Duarte da Silveira, Marlon S. Sigales, Ramón Justiniano Benítez Centurion, Â. V. Reis, M. F. Ferreira

{"title":"COMPUTATIONAL TOOL FOR SELECTION AND RANKING OF PULL-TYPE FORAGE HARVESTERS","authors":"Daniel Duarte da Silveira, Marlon S. Sigales, Ramón Justiniano Benítez Centurion, Â. V. Reis, M. F. Ferreira","doi":"10.13083/reveng.v29i1.10573","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.10573","url":null,"abstract":"The variety of forage harvester models available on Brazilian market demand practical tools for selecting and ranking these equipments. The present study aimed at the elaboration of an algorithm capable of providing simple and objective criteria that assist in the decision making. The communication channel of the companies was used to obtain technical specifications and price of the equipment, which were tabulated in spreadsheets. The instructions for the manipulation of the obtained data were elaborated in the software R, being calculated ranks for the following requirements considering simulated information about a farm: price (COT), productivity and price relation (PROD.COT), fuel consumption (CONS), operational comfort (CONF), versatility (VERS) and overall (GERAL). We obtained information from 45 models belonging to 8 companies. The best machine in the overall rank got similar rank in the COT, PROD.COT and CONS ranks and worst rank for CONF. The algorithm established allowed the selection and ranking of the forage harvesters analyzed, providing simple, objective and easily interpreted criteria for the use of the farmers and the technicians who assist them.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66373646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thornthwaite and mather soil water balance model adapted for estimation of real evapotranspiration of the pasture Thornthwaite和mather土壤水分平衡模型适用于估算牧草的实际蒸散量

Engenharia na Agricultura Pub Date : 2021-01-01 DOI: 10.13083/reveng.v29i1.11703

Fabiana da Costa Barros, Suelen da Costa Faria Martins, G. Lyra, Leonardo Rafael da Silva, J. Francisco, M. Abreu, G. B. Lyra

{"title":"Thornthwaite and mather soil water balance model adapted for estimation of real evapotranspiration of the pasture","authors":"Fabiana da Costa Barros, Suelen da Costa Faria Martins, G. Lyra, Leonardo Rafael da Silva, J. Francisco, M. Abreu, G. B. Lyra","doi":"10.13083/reveng.v29i1.11703","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.11703","url":null,"abstract":"Determining the real water requirement for pastures is essential for the rational use of irrigation. The aim of this work was to assess the crop coefficient and performance of the Thornthwaite and Mather soil water balance (ThM) adapted to estimate the daily actual evapotranspiration (ETa) of a pasture in relation to the Bowen ratio - energy balance method (BREB). The experiment was carried out from July 2018 to June 2019 in Cachoeiras de Macacu, Rio de Janeiro State (RJ) (22º 27’S; 42º 45’W and 30 m altitude). Micrometeorological and meteorological measurements were conducted in a micrometeorological tower installed in the pasture and also in an automatic weather station, located 1 km from the pasture area. The ThM model was evaluated using linear regression between ETa determinate from BREB and the estimates from ThM using its coefficient of determination (R²) and the modified Willmott agreement index (dm). The ThM model underestimated (between 11 and 16%) the ETa for all seasons, except for spring, which overestimated by 1%. The highest precision and accuracy of the estimates were observed in autumn (R² = 0.84 and dm = 0.68) and spring (R² = 0.83 and dm = 0.82). In summer (R² = 0.56 and dm = 0.73) and winter (R² = 0.43 and dm = 0.66), the lower performance was caused by the inability of the model to represent water extraction from the soil in dry periods.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66373740","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of soybean genotypes as a function of water availability and sowing seasons in Rio Verde, state of Goias 戈亚斯州里约热内卢Verde大豆基因型的发展与水分供应和播种季节的关系

Engenharia na Agricultura Pub Date : 2021-01-01 DOI: 10.13083/reveng.v29i1.11758

G. O. Santos, Samuel Leandro Soares, Gustavo André Simon, Renata Cristina Alvares

{"title":"Development of soybean genotypes as a function of water availability and sowing seasons in Rio Verde, state of Goias","authors":"G. O. Santos, Samuel Leandro Soares, Gustavo André Simon, Renata Cristina Alvares","doi":"10.13083/reveng.v29i1.11758","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.11758","url":null,"abstract":"Soybean crop yield is affected in the absence of favorable conditions for its complete development, and one of the most limiting factors is the water availability throughout the crop cycle. Therefore, the objective of this study was to evaluate the behavior of three soybean genotypes, in two sowing dates, during two harvests, in the city of Rio Verde, Stat of Goiás. Four experiments were carried out in a randomized block design, with four replicates in the 2018/2019 and 2019/2020 harvests. The variables analyzed in the experiment were plant height at maturity, days to maturity, and grain yield. The water balance in the soil considered the water storage of 46.8 mm. It was observed periods with greater water deficiency (53.5 mm) in the 2018/2019 harvest for all genotypes. In short, for genotypes with 100 to 110 days of the cycle, the sowing time that showed to be the most promising to obtain higher yields, was between October 20 and November 20, for genotypes with a cycle of 120 days. This range of adaptation becomes broader, mainly because these genotypes have a longer vegetative period, being, therefore, the period of least water requirement for the crop.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66373894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

EQUATIONS OF INTENSITY, DURATION AND FREQUENCY FOR THE PERUÍPE, ITANHÉM AND JUCURUÇU RIVER BASINS PERUÍPE、itahÉM和JUCURUÇU河流域的强度、持续时间和频率方程

Engenharia na Agricultura Pub Date : 2020-12-31 DOI: 10.13083/reveng.v29i1.8553

Patrick Gomes Moreira, A. Vilas Boas, Priscila Félix Almeida, João Batista Lopes da Silva

{"title":"EQUATIONS OF INTENSITY, DURATION AND FREQUENCY FOR THE PERUÍPE, ITANHÉM AND JUCURUÇU RIVER BASINS","authors":"Patrick Gomes Moreira, A. Vilas Boas, Priscila Félix Almeida, João Batista Lopes da Silva","doi":"10.13083/reveng.v29i1.8553","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8553","url":null,"abstract":"The intense rainfall equations present a great technical interest for hydraulic works projects. In the State of Bahia, there are only 19 equations of intensity, duration and frequency modeling, requiring a greater number of equations for the State. The most recent ones are almost 15 years old, with only two in the Peruípe, Itanhém and Jucuruçu river basins. Thus, the objective of this work was to determine the parameters of the equations of intensity, duration and frequency (IDF) of the rainfall stations for different locations of the basins of the Peruípe, Itanhém and Jucuruçu rivers, located in the far southern Bahia State. Initially, 59 stations were selected, out of which only those with over 20 year-old data and records from 1980 onwards. Rainfall disaggregation was carried out using the method proposed by Cetesb (Environmental Company of the State of São Paulo, Brazil) and the parameters (K, a, b and c) were adjusted through nonlinear multiple regression using the nonlinear-generalized reduced gradient interaction method, where adjustment was evaluated by the coefficient of determination (R2). In the end, 29 equations were adjusted, with coefficient of determination greater than 0.99, therefore, improving the perspective of planning hydraulic works in the region. This correlation could also be observed by the regression equation of the observed data with the adjusted ones, where the slope coefficient of the line was close to 1.0 for all rainfall stations.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48906113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

METHODOLOGY OF ECONOMIC EVALUATION OF EXTERNALITY EMISSIONS IN RELATION TO THE VALUE OF ELECTRIC POWER GENERATED BY THE BURNING OF BIOGAS IN THE RURAL ENVIRONMENT 农村环境中沼气燃烧发电价值与外部性排放的经济评估方法

Engenharia na Agricultura Pub Date : 2020-12-31 DOI: 10.13083/reveng.v29i1.11493

P. Castro, Iago Barbosa do Nascimento Salvador, Delly Oliveira Filho

{"title":"METHODOLOGY OF ECONOMIC EVALUATION OF EXTERNALITY EMISSIONS IN RELATION TO THE VALUE OF ELECTRIC POWER GENERATED BY THE BURNING OF BIOGAS IN THE RURAL ENVIRONMENT","authors":"P. Castro, Iago Barbosa do Nascimento Salvador, Delly Oliveira Filho","doi":"10.13083/reveng.v29i1.11493","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.11493","url":null,"abstract":"Brazilian cattle raising needs greater automation as a way to improve productivity and at the same time new ways to meet the growing energy demand. Thus, an alternative is to use renewable sources of electric energy such as biogas. This work proposes a methodology for economic evaluation of the externality denominated emissions, originating from the generation of electric energy through the burning of biogas from residues of Brazilian livestock. Thus, an equation was proposed and applied to obtain the value of this externality as a percentage of the value of electric energy, where greater results indicate greater potential for this externality. The results showed that the emissions, assessed as an externality and quantified on the basis of carbon credits can account for up to 69.4% of the electricity price, but if quantified in relation to the social impact of carbon, the externality in reference exceeds the value of electricity, reaching 408.4%. As a result, it is clear that the use of biogas for power generation in livestock can present other valuable products in addition to electricity and, consequently, can add value to livestock activity.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48724184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DEVELOPMENT OF A LASER PROFILOMETER FOR THE GENERATION OF 3D- MODELS TO MEASURE THE VOLUME OF FERTILIZER APPLIED BY FERTILIZER SOWERS 激光轮廓仪的开发，用于生成三维模型来测量肥料播种机施用的肥料体积

Engenharia na Agricultura Pub Date : 2020-12-31 DOI: 10.13083/reveng.v29i1.8800

A. C. L. Lino, Edson D’Avila, Marcos Valério Gebra da Silva, I. D. Dal Fabbro, Denival da Costa Silva

{"title":"DEVELOPMENT OF A LASER PROFILOMETER FOR THE GENERATION OF 3D- MODELS TO MEASURE THE VOLUME OF FERTILIZER APPLIED BY FERTILIZER SOWERS","authors":"A. C. L. Lino, Edson D’Avila, Marcos Valério Gebra da Silva, I. D. Dal Fabbro, Denival da Costa Silva","doi":"10.13083/reveng.v29i1.8800","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8800","url":null,"abstract":"Laser profilometry based on triangulation is a method for measuring depth of points in space that uses a laser beam to scan the object. The image of a laser-line projected onto a surface of an object is captured and treated in image-analysis software, which calculates its profile. The union of a sequence of profiles allows the construction of the 3D-digital models of objects. The objective of this work was to develop a methodology and to build a prototype of a threedimensional scanner based on laser triangulation. A prototype was built, with a gantry structure containing a car on which are a laser diode and a camera. This car is driven by an endless shaft driven by an electric motor with variable speed. When moving the car, the laser module produces a line on the surface of the object that is filmed by a camera fixed at a known angle, obtaining the necessary information to generate the 3D model of the object. Tests were made on regular objects: hubcaps, pyramids and cobblestones and the results showed that the 3D-models produced had the same dimensions. Tests were also made on irregular objects such as soil surface and fruit. The prototype proved to be solid for generating 3D models of objects.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48422664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Isotermas de adsorção de umidade e cinética de secagem de sementes de trevo persa (Trifolium resupinatum L.) e trevo vesiculoso (Trifolium vesiculosum) ¬¬¬¬ 波斯三叶草（Trifolium resupinatum L.）和泡状三叶草（Trifolium vesculosum）种子的水分吸附等温线和干燥动力学

Engenharia na Agricultura Pub Date : 2020-12-24 DOI: 10.13083/reveng.v29i1.9935

G. Soares, Scarlet Neves Tuchtenhagen, Luiz Antôno de Almeida Pinto, C. Felipe

{"title":"Isotermas de adsorção de umidade e cinética de secagem de sementes de trevo persa (Trifolium resupinatum L.) e trevo vesiculoso (Trifolium vesiculosum) ¬¬¬¬","authors":"G. Soares, Scarlet Neves Tuchtenhagen, Luiz Antôno de Almeida Pinto, C. Felipe","doi":"10.13083/reveng.v29i1.9935","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.9935","url":null,"abstract":"The aim of this work was to obtain adsorption isotherms and to study the drying kinetics of persian clover (Trifolium resupinatum L.) and arrowleaf clover (Trifolium vesiculosum) seeds, in addition, fitting the experimental data by the predicted models of the literature. The equilibrium moisture content and the moisture adsorption behavior were found by isotherms curves at 40, 45 and 50 ºC, and the Peleg model was the most suitable. The drying kinetics was determined by thin layer assays in an air parallel flow dryer at all three temperatures. In addition, it was demonstrated the predominance of the falling drying rate period for the two species of seeds, and the critical moisture content values were approximately of 0.20 and 0.25 gwater gdry matter-1 for persian clover and arrowleaf clover seeds, respectively. The effective diffusivity values were estimated in ranges of values of 3.61×10-11 – 6.81×10-11 m² s-1 for persian clover and 6.76×10-11 – 1.15×10-10 m²s-1 for arrowleaf clover seeds and the temperature effect was expressed by an Arrhenius relation. Thus, drying kinetics confirmed the greater difficulty in moisture removal from the arrowleaf clover seeds, compared to the persian clover seeds drying, in agreement with the results obtained through adsorption isotherms.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47689272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

POTASSIUM FERTIRRIGATION ON ICEBERG LETTUCE 卷心莴苣的钾肥施用

Engenharia na Agricultura Pub Date : 2020-12-23 DOI: 10.13083/reveng.v29i1.8965

G. Q. D. Oliveira, G. Biscaro, L. O. Geisenhoff, Karoline kovaleski Bertoldo Drehmer

引用次数: 0

INFORMATIONAL PHASE OF THE DEVELOPMENT OF EQUIPMENT FOR ANALYSIS OF DIRECT SHEAR AND PRE-COMPACTION OF THE SOIL 土壤直剪和预压实分析设备开发的信息阶段

Engenharia na Agricultura Pub Date : 2020-12-23 DOI: 10.13083/reveng.v29i1.8896

Maico Danúbio Duarte Abreu, Daiane Aparecida Krewer, Douglas Schulz Bergmann da Rosa, Fábio Brongar Milech, A. Machado, R. L. T. Machado

{"title":"INFORMATIONAL PHASE OF THE DEVELOPMENT OF EQUIPMENT FOR ANALYSIS OF DIRECT SHEAR AND PRE-COMPACTION OF THE SOIL","authors":"Maico Danúbio Duarte Abreu, Daiane Aparecida Krewer, Douglas Schulz Bergmann da Rosa, Fábio Brongar Milech, A. Machado, R. L. T. Machado","doi":"10.13083/reveng.v29i1.8896","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8896","url":null,"abstract":"Given the real need for advances in studies such as the relationship of soil-machine dynamics, it is clear that there are almost no innovative systems developed to attend this demand. The design of agricultural machinery and equipment can be facilitated by having information and mechanisms that allow the prediction of the mechanized-set behavior in real work situation, especially regarding the traction effort demanded by the tractor, due to the energy demand of the equipment that interact directly with the soil. Obtaining this information usually requires high-cost imported laboratory equipment. Thus, the objective of this work was to obtain the design specifications for the development of a direct shear and soil pre-compaction analysis equipment with low manufacturing cost. The Phases Methodology was used to obtain the necessary parameters, in the informational phase of the desirable aspects for each design requirement. Through a step-by-step analysis, it was possible to obtain customers’ needs, together with the establishment of the desired criteria, and the design requirements for the new product development was generated. The use of the Phases Model allowed the transformation of customers’ requirements into the design requirements, enabling hierarchization by degree of importance and thus enabling the execution of future steps.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45532349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

GROWTH EVALUATION OF CROSSBRED HOLSTEIN×GYR CALVES AND HEIFERS RAISED IN TROPICAL CONDITIONS 热带条件下饲养的杂交holstein×gyr犊牛和小母牛的生长评价

Engenharia na Agricultura Pub Date : 2020-12-23 DOI: 10.13083/reveng.v29i1.11558

Helena de Souza Reis, Caroline Medeiros Castro, Ana Caroline Ramos Teles Silva, Thais Gomes Araújo Sousa, A. M. Moura, A. L. Silva

{"title":"GROWTH EVALUATION OF CROSSBRED HOLSTEIN×GYR CALVES AND HEIFERS RAISED IN TROPICAL CONDITIONS","authors":"Helena de Souza Reis, Caroline Medeiros Castro, Ana Caroline Ramos Teles Silva, Thais Gomes Araújo Sousa, A. M. Moura, A. L. Silva","doi":"10.13083/reveng.v29i1.11558","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.11558","url":null,"abstract":"The objective of this study was to evaluate growth and body development of crossbred Holstein×Gyr calves and heifers raised in tropical conditions. Thirty-two crossbred heifers (Holstein×Gyr) aged between 1 and 1314 days were used. For assessing the animals’ body weight, the heifers were weighed once a week with a chest tape for weighing cattle, using the specification for medium breeds recorded on the tape itself. The experiment was conducted in a completely randomized design. Body weight data were analyzed using linear regression as a function of age, using the R software. We could observe that animals less than 200 days old had a performance estimate of approximately 0.517 kg day-1, while after at 200 days of life, the estimated weight gain was 0.237 kg day-1. Heifers had a higher growth rate before 200 days of age than after this age, which can affect the age at the first calving of the herd. Thus, as the age for the first breeding is linked to the weight of the live animals, the delay in the growth of the calves becomes detrimental to the breeding.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43611813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0