Engenharia na Agricultura最新文献_第10页

MORPHOLOGY OF PARDO RIVER WATERSHED AT THE BORDER OF THE STATES OF BAHIA AND MINAS GERAIS 巴伊亚州和米纳斯吉拉斯州交界的帕尔多河流域的形态

Engenharia na Agricultura Pub Date : 2020-12-21 DOI: 10.13083/reveng.v29i1.8256

Rodrigo Lacerda Brito Neto, Cristiano Tagliaferre, O. L. Lemos, F. A. Rocha, A. D. Paula, Lorena Júlio Gonçalves

{"title":"MORPHOLOGY OF PARDO RIVER WATERSHED AT THE BORDER OF THE STATES OF BAHIA AND MINAS GERAIS","authors":"Rodrigo Lacerda Brito Neto, Cristiano Tagliaferre, O. L. Lemos, F. A. Rocha, A. D. Paula, Lorena Júlio Gonçalves","doi":"10.13083/reveng.v29i1.8256","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8256","url":null,"abstract":"ABSTRACT\u0000The spatial analysis of watersheds, as well as the evaluation off the changes occurring in their catchment area along the time are essential for the qualification of environmental changes. This study aims to characterize morphometrically the Pardo river watershed, as well as to evaluate the changes in soil use and occupation occurring between 2001 and 2016. The morphometric analysis consisted of the determination of the geometric parameters, relief information and drainage network using Geographic Information Systems. The land use and occupation information was collected through data from the online mapping platform of the Brazilian Mapping and Land Use Mapping (MapBiomas). According to the results, morphometry indicated that the watershed has low propensity to flood occurrence and tendency to conservation; great part of its area is between 600 and 1000 m of altitude, with predominance of undulating and soft-undulating slopes. The analysis of land use and occupation showed that the area devoted to agricultural activities increased during the period evaluated and occupies most of the basin, while the area of ??forests was reduced, the second in size, and these two classes occupy more than 96 % of catchment area.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45754431","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

MINIMUM NUMBER OF POINTS FOR A RELIABLE SOIL WATER RETENTION CURVE USING RICHARDS’ PRESSURE CHAMBER 用RICHARDS压力室建立可靠土壤保水曲线的最小点数

Engenharia na Agricultura Pub Date : 2020-12-18 DOI: 10.13083/reveng.v29i1.7320

Gilmar Batista Grigolon, A. Diotto, C. G. Lima, J. Francisco, M. V. Folegatti

{"title":"MINIMUM NUMBER OF POINTS FOR A RELIABLE SOIL WATER RETENTION CURVE USING RICHARDS’ PRESSURE CHAMBER","authors":"Gilmar Batista Grigolon, A. Diotto, C. G. Lima, J. Francisco, M. V. Folegatti","doi":"10.13083/reveng.v29i1.7320","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.7320","url":null,"abstract":"The soil hydro-physical characteristics are very important for studies about soil water dynamics. The soil water retention curve it is a soil characteristic sometimes expensive and time consuming to be done and could be a problem for farmers. The numbers of points and its tension evaluated are normally choose arbitrarily. This study aimed to define the fewest pairs of soil moisture and water soil potential points which result in a reliable water retention curve in two different soils (sandy and clay). Using different tensions by suction table and Richards’ pressure chamber, nine replications were adjusted by van Genuchten's equation. Curves with 4, 5, 7, 8, 9, 10 and 13 points were studied and the curve with 13 points was adopted as standard. The obtained parameters for different pairs of soil moisture and their corresponding soil water potential were compared to the equivalent standard curve and submitted to analysis of variance (F test), and their values were compared by the Scott-Knott test (5% of probability). The curve with 7 points, using the tensions of 0; 40; 100; 300; 1,000; 5,000 e 15,000 hPa, was the lower number of points that did not showed statistical difference in any parameters of the model and the point with 15,000 hPa shown to be important and should be used on the combination of points to obtain a good adjustment.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45840209","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

DRYING KINETICS OF PEELED COFFEE SUBMITTED TO DIFFERENT TEMPERATURES AND RELATIVE HUMIDITY OF THE AIR OF DRYING AFTER PARTIAL DRYING 局部干燥后，去皮咖啡在不同干燥空气温度和相对湿度下的干燥动力学

Engenharia na Agricultura Pub Date : 2020-12-15 DOI: 10.13083/reveng.v29i1.8217

R. Moreira, J. Corrêa, E. T. Andrade, R. A. Rocha

{"title":"DRYING KINETICS OF PEELED COFFEE SUBMITTED TO DIFFERENT TEMPERATURES AND RELATIVE HUMIDITY OF THE AIR OF DRYING AFTER PARTIAL DRYING","authors":"R. Moreira, J. Corrêa, E. T. Andrade, R. A. Rocha","doi":"10.13083/reveng.v29i1.8217","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8217","url":null,"abstract":"The mathematical modelling is fundamental for the understanding of the related processes the drying, that influences the quality of the coffee drink. The objective of this study was to evaluate the influence of different relative humidity of the drying air after partial drying on drying kinetics of peeled coffees. Coffee fruits were harvested in the cherry stage and processed by wet, resulting in the portion of peeled coffee. Eleven treatments of drying were accomplished, being nine results of the combination of three dry bulb temperatures and three dew point temperatures, more two treatments without the control of the dew point temperatures. The control of the relative humidity by the dew point temperature was made after the grains reached the partial drying. Among the studied models, those of Diffusion Approximation and Modified Midilli were the most adequate for describing the drying process of the first and second part of drying respectively. The effective diffusivity coefficient of water in coffee grains ranged from 0.81 x 10-11 to 1.84 x 10-11 m² .s-1 during the first part of the drying and ranged from 1.49 x 10-11 to 3.29 x 10-11 m² .s-1 during the second part of the drying, increasing significantly with the reduction of the dew point temperature and increase of the dry bulb temperature.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44149539","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

MODELS FOR ESTIMATING POTASSIUM AND NITRATE TO CHANGES OF ION CONCENTRATION IN SOIL SOLUTION 土壤溶液中钾和硝态钾离子浓度变化的估算模型

Engenharia na Agricultura Pub Date : 2020-12-14 DOI: 10.13083/reveng.v29i1.8851

M. S. Campos, E. F. Coelho, Bruno Laecio Silva Pereira, D. Melo, Alisson Jadavi Pereira da Silva, W. L. Simões

{"title":"MODELS FOR ESTIMATING POTASSIUM AND NITRATE TO CHANGES OF ION CONCENTRATION IN SOIL SOLUTION","authors":"M. S. Campos, E. F. Coelho, Bruno Laecio Silva Pereira, D. Melo, Alisson Jadavi Pereira da Silva, W. L. Simões","doi":"10.13083/reveng.v29i1.8851","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8851","url":null,"abstract":"The adequate fertigation use bases on the application of nutrients by water according to crop needs throughout its cycle. The evaluation of nutrients in the soil solution may be faster if based upon soil electric conductivity and moisture by using parametric models. The objective of this study was to evaluate the sensitivity of two parametric models for estimating nitrate and potassium concentration in the soil solution under changes of ion concentration during a crop cycle. One model was that from Vogeler et al. (1996) in which ion concentration is a function of soil moisture and electrical conductivity; the other was the potential in which the concentration is a function of the electrical conductivity of the soil solution. The potential model presented a better performance compared to that of adapted from Vogeler, as for estimation of ion concentrations as for the sensitivity of this model to changes in concentration of this ion in the soil solution. The models showed greater sensitivity when fitted to data corresponding to all possible occurrences in the soil during the crop cycle. The model should consider a range of concentrations with the possible values of the soil solution along crop cycle.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42974410","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

OPTIMIZATION OF CANOLA AGRONOMIC YIELD SUBMITTED TO DIFFERENT DOSES OF POTASSIUM IN FLOWERING 油菜开花期不同施钾量农艺产量的优化

Engenharia na Agricultura Pub Date : 2020-12-01 DOI: 10.13083/reveng.v29i1.8201

W. B. Rosa, J. B. Duarte Júnior, G. Tomm, A. C. T. D. Costa, Samara Brandão Queiroz

{"title":"OPTIMIZATION OF CANOLA AGRONOMIC YIELD SUBMITTED TO DIFFERENT DOSES OF POTASSIUM IN FLOWERING","authors":"W. B. Rosa, J. B. Duarte Júnior, G. Tomm, A. C. T. D. Costa, Samara Brandão Queiroz","doi":"10.13083/reveng.v29i1.8201","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8201","url":null,"abstract":"Providing nutrients in quantities and at the right time is of paramount importance to obtain high yields in canola culture. The objective of this work was to evaluate the agronomic performance of the Hyola 433 hybrid, submitted to potassium fertilization during flowering, during the 2016/2017 harvest. A randomized block design with four repetitions was used, in a 2x5 factorial scheme, with two canola phenological stages (F1 and F2) and five potassium doses in coverage (0, 15, 30, 60 and 120 kg ha-1). The following phenometric variables were evaluated: emergence at the beginning of flowering (EIF), flowering duration (DFL), maturation duration (DFL) and cycle; as well as agronomic variables: number of silicas per plant (NSP), number of grains per silicas (NGS), plant height (ESP), mass of a thousand grains (MMG), productivity (PRO) and oil content. There was no interaction between application times and potassium doses for MMG, PRO and oil content. The dose of 60 kg ha-1 increased the DFL and the cycle. The maximum number of 309 silicas per plant was obtained with the dose of 120 kg ha-1 of K2O. The increase of potassium concentrations reduced calcium concentration in plant tissue. In general, potassium fertilization during flowering increases the expression of variables related to canola phenology and agronomic performance.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44535072","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

MODELING OF WATER EROSION IN A SUB-BASIN IN RIO GRANDE DO SUL USING THE RUSLE MODEL 用rusle模型模拟大南里约热内卢盆地的水侵蚀

Engenharia na Agricultura Pub Date : 2020-11-09 DOI: 10.13083/reveng.v29i1.8930

Thais Palumbo Silva, S. Nachtigall, M. C. Nunes, Cláudia Liane Rodrigues Lima, Ana Paula Knapp

{"title":"MODELING OF WATER EROSION IN A SUB-BASIN IN RIO GRANDE DO SUL USING THE RUSLE MODEL","authors":"Thais Palumbo Silva, S. Nachtigall, M. C. Nunes, Cláudia Liane Rodrigues Lima, Ana Paula Knapp","doi":"10.13083/reveng.v29i1.8930","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8930","url":null,"abstract":"The intense use of farming land has caused many consequences to the environment, among them, water erosion. The scale study of river basins through modeling allows the identification and estimation of soil losses, aiming at the conservationist planning of the site. The objective of this work was to predict soil loss in the Micaela sub-basin, with an area of ??37 km2 located in the municipality of Pelotas, Rio Grande do Sul. For the prediction of soil loss, the Revised Universal Soil Loss Equation (RUSLE) was used. Erosivity was obtained from data from the literature and erodibility was estimated by means of the inherent soil attributes and the topographic factor calculated according to the accumulated flow and declivity in each pixel. For the cover factor, data from the literature were used, according to use recommendation and existing soil cover. The study area shows a strong erosivity, which ranged from 8,045 to 8,833 MJ mm ha-1 h-1 year-1. The Argissolos occupy 81.31% of the sub-basin and present high erodibility, varying from 0.0369 to 0.0422 Mg ha h ha-1 MJ-1 mm -1. The sites with the largest vegetation cover were those with the lowest soil losses. However, in more than 36% of the area, the soil losses are above the tolerable therehsold, indicating that they are more prone to degradation and, therefore, the systems of land use and adopted management should be reviewed.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45019831","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

REFERENCE EVAPOTRANSPIRATION THROUGH HARGREAVES METHOD USING THE SOLAR RADIATION ESTIMATION FOR GOIÁS STATE, BRAZIL 利用哈格里夫斯方法估算巴西goiÁs州的太阳辐射参考蒸散量

Engenharia na Agricultura Pub Date : 2020-10-27 DOI: 10.13083/reveng.v29i1.8752

C. V. Leite, D. Casaroli, M. R. Vicente, Raphael Cessa Maia Aveiro, J. A. Junior

{"title":"REFERENCE EVAPOTRANSPIRATION THROUGH HARGREAVES METHOD USING THE SOLAR RADIATION ESTIMATION FOR GOIÁS STATE, BRAZIL","authors":"C. V. Leite, D. Casaroli, M. R. Vicente, Raphael Cessa Maia Aveiro, J. A. Junior","doi":"10.13083/reveng.v29i1.8752","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8752","url":null,"abstract":"This study evaluated the Hargreaves model (HG) with seasonal adjustments of the calibration coefficient (Krs) of the radiation equation to estimate the reference evapotranspiration (ETo) in 23 weather stations in Goiás State, Brazil, in comparison to the Penman-Monteith FAO (PM-FAO) standard method. The models were evaluated using Pearson’s correlation coefficient, Willmott’s agreement index, relative error, absolute mean error and root mean square error. The Krs values ranged from 0.146 to 0.189 ° C-0.5, while ETo PM-FAO ranged from 3.68 to 4.79 mm d-1; ETo HG from 3.99 to 5.16 mm d-1 and ETo HG-Krs from 4.15 to 5.02 mm d-1 in the annual period. Seasonal adjustments resulted in values of 0.144 to 0.205 ° C-0.5 for the dry period, from April to September, and 0.144 to 0.146 ° C-0.5 for the rainy period, from October to March. The first quarter (summer), presented Krs values from 0.150 to 0.175 ° C-0.5; the second quarter (autumn), from 0.154 to 0.218 ° C-0.5; the third quarter (winter), from 0.139 to 0.206 ° C-0.5; and, finally, the fourth quarter (spring) of 0.141 to 0.166 ° C-0.5. Thus, the use of the seasonally adjusted model proved to be viable for the estimation of ETo, in view of the simplicity and its good adherence to the standard method.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49093615","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

APPLICATION OF THE CONSTRUCTION WASTE AS A REDUCING AGENT IN THE SOLUBILITY OF IRON TAILING METALS 建筑垃圾还原剂在铁尾矿金属溶解性研究中的应用

Engenharia na Agricultura Pub Date : 2020-10-23 DOI: 10.13083/reveng.v29i1.8733

S. M. Almeida, A. Matos, G. Puiatti, R. T. Barros

{"title":"APPLICATION OF THE CONSTRUCTION WASTE AS A REDUCING AGENT IN THE SOLUBILITY OF IRON TAILING METALS","authors":"S. M. Almeida, A. Matos, G. Puiatti, R. T. Barros","doi":"10.13083/reveng.v29i1.8733","DOIUrl":"https://doi.org/10.13083/reveng.v29i1.8733","url":null,"abstract":"Iron ore tailings has acid pH and high content of metals, such as iron, aluminum and manganese. Regarding the environment, these metals poses a risk of contaminating the soil and underground water. Yet, construction residues usually have high pH and because of this, they can be used to neutralize soil acidity and to reduce metal availability in mining tailing piles. The objective of this study was to evaluate the aplicabilith of CW to promote neutralization of the acidity in iron ore tailings aiming at decreasing the solubility and mobilith of metal found in them. Thus, a sample of construction waste was collected and characterized which was later incorporated at different doses into a sample of iron mining tailing collected in the Iron Quadrangle (Minas Gerais – Brazil). The construction waste raised the pH of the tailing sample from 5.58 to 8.22. Moreover, the incorporation of the waste incorporation decreased the manganese solubility in at least 80%. Despite the lack of national legislations and policies on the use of construction waste for this purpose, the results show that it is a promising technological alternative.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45354123","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

PROFILE OF SAWMILLS IN THE UBÁ FURNITURE HUB IN THE STATE OF MINAS GERAIS 米纳斯吉拉斯州ubÁ家具中心锯木厂概况

Engenharia na Agricultura Pub Date : 2020-10-06 DOI: 10.13083/reveng.v28i.8520

V. R. Castro, L. J. Costa, Wilton Ribeiro de Almeida Filho

{"title":"PROFILE OF SAWMILLS IN THE UBÁ FURNITURE HUB IN THE STATE OF MINAS GERAIS","authors":"V. R. Castro, L. J. Costa, Wilton Ribeiro de Almeida Filho","doi":"10.13083/reveng.v28i.8520","DOIUrl":"https://doi.org/10.13083/reveng.v28i.8520","url":null,"abstract":"The objective of this work was to identify, diagnose and characterize the sawmills in four municipalities in the State of Minas Gerais (Divinésia, Senador Firmino, Brás Pires and Dores do Turvo) that provide lumber for the industries in the Furniture Hub in Ubá, State of Minas Gerais. A semi-structured questionnaire with open questions, answered in loco and accompanied by a responsible person (interviewer), with information on the identification of the potentialities and fragilities of the local lumber sector as well as to know the raw material (logs), the wood split processes, the internal management, the qualification of the employees, the machinery, products, market and prospects of the sector in these municipalities. It was found that Eucalyptus wood is the most used. The diameter of the logs is shown as the factor that affects the yield in 100% of the analyzed sawmills, where cracking and variability of the logs are the main difficulties of working with the raw material. The lumber sector in the analyzed municipalities needs a greater qualification, both managerial and technical, to improve the activity. In addition, it is necessary to better organize the companies related to the lumber sector through associations and support from local entities and greater exposure of the products to the local consumers.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42121020","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

FIXED CONVENTIONAL SPRINKLER IRRIGATION SYSTEM: COMPONENTS OF COST AND ECONOMY OF SCALE 固定式常规喷灌系统：成本构成与规模经济

Engenharia na Agricultura Pub Date : 2020-09-23 DOI: 10.13083/REVENG.V28I.8034

Luis H. B. Ben, M. X. Peiter, A. D. Robaina, R. R. Torres, J. H. Kirchner

{"title":"FIXED CONVENTIONAL SPRINKLER IRRIGATION SYSTEM: COMPONENTS OF COST AND ECONOMY OF SCALE","authors":"Luis H. B. Ben, M. X. Peiter, A. D. Robaina, R. R. Torres, J. H. Kirchner","doi":"10.13083/REVENG.V28I.8034","DOIUrl":"https://doi.org/10.13083/REVENG.V28I.8034","url":null,"abstract":"The costs involved in the implementation and operation of irrigation systems are of paramount importance for the economic planning of irrigated agriculture. Therefore, the objective of this work was to determine the implantation, fixed and annual variables costs, and the occurrence of economies of scale for a fixed conventional sprinkler irrigation system for different area sizes and slope in the impulsion line. Thus, irrigation projects were developed for areas of 1, 3, 5, 10, 15, 20 and 25 ha and slopes in the pumping pipe of 7 and 15%. Also, this work evaluated the implementation, annual fixed and variable costs and their components and the occurrence of economy of scale. The implementation, fixed and variable costs increased as the size of the area increased, but for the fixed and implementation costs, an increase was observed due to the exponential cost of the pipes and their greater participation in the total cost and the variable cost was because the maintenance follows the implementation cost. Therefore, the cost with the pipelines has greater participation in the implementation of the system. The cost of implementation and the total fixed and variable costs raised with the increases in the size of the irrigated area. The variable cost of energy is constant as area size is increased and the raise is by approximately 5.2%, as the slope increases from 7 to 15%. The increasing in the size of the irrigated area provides diseconomies of scale.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41455031","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