Pub Date : 2022-08-19DOI: 10.13083/reveng.v30i1.14017
Rodrigo Moura Pereira, D. Sandri, J. S. Silva Júnior
Soil moisture sensors enabled new automation and computerization solutions in agriculture. However, its use still requires prior calibrations to attest its accuracy to estimate soil moisture. Thus, in this study a prototype for soil moisture monitoring was developed using the capacitive sensor SKU:SEN0193 integrated with the Arduino microcontroller. The prototype was calibrated based on the relationship between volumetric moisture and sensor output voltage in deformed samples of Red-yellow Latosol (RYL), Regolitic Neosol (RN), and Red Latosol (RL) of the Cerrado region, Federal District, Brazil. The calibration of sensors resulted in a second-degree polynomial model with R² between 0.93 and 0.96 for RYL, 0.89 and 0.92 for RN, and 0.86 and 0.88 for RL. Root mean square errors (RMSE) of volumetric moisture were 0.08, 0.12, and 0.15 cm3.cm-3 for RYL, RN, and RL, respectively. Sensors at operating voltage of 5.00 V showed less variability of readings, with coefficient of variation (CV) between 0.21 and 1.54%, while sensors at 3.30 V showed CVs between 3.27 and 17.84%. It is recommended to calibrate the SKU:SEN0193 for each soil type in order to obtain reliable estimates of water content for RYL, RN, and RL.
{"title":"Evaluation of low-cost capacitive moisture sensors in three types of soils in the Cerrado, Brazil","authors":"Rodrigo Moura Pereira, D. Sandri, J. S. Silva Júnior","doi":"10.13083/reveng.v30i1.14017","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.14017","url":null,"abstract":"Soil moisture sensors enabled new automation and computerization solutions in agriculture. However, its use still requires prior calibrations to attest its accuracy to estimate soil moisture. Thus, in this study a prototype for soil moisture monitoring was developed using the capacitive sensor SKU:SEN0193 integrated with the Arduino microcontroller. The prototype was calibrated based on the relationship between volumetric moisture and sensor output voltage in deformed samples of Red-yellow Latosol (RYL), Regolitic Neosol (RN), and Red Latosol (RL) of the Cerrado region, Federal District, Brazil. The calibration of sensors resulted in a second-degree polynomial model with R² between 0.93 and 0.96 for RYL, 0.89 and 0.92 for RN, and 0.86 and 0.88 for RL. Root mean square errors (RMSE) of volumetric moisture were 0.08, 0.12, and 0.15 cm3.cm-3 for RYL, RN, and RL, respectively. Sensors at operating voltage of 5.00 V showed less variability of readings, with coefficient of variation (CV) between 0.21 and 1.54%, while sensors at 3.30 V showed CVs between 3.27 and 17.84%. It is recommended to calibrate the SKU:SEN0193 for each soil type in order to obtain reliable estimates of water content for RYL, RN, and RL.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44296088","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}
Pub Date : 2022-08-17DOI: 10.13083/reveng.v30i1.13813
Fabrina Teixeira Ferraz, L. C. J. França, Adênio Louzeiro de Aguiar Júnior, Temístocles Pacheco Lima, Fausto Weimar Acerbi Júnior
The intensive use of agrochemicals has been associated with global human health problems and environmental contamination. Brazil is the world’s largest agrochemical consumer, and this position highlights the growth of agribusiness in the MATOPIBA region (Maranhão, Tocantins, Piauí, and Bahia states). The use of agrochemicals is recurrent in local agricultural practices. However, there is little information on the environmental impacts and risks of contamination regarding river basins in this region. Thus, this study aimed to evaluate the risk of contamination by agrochemicals in the basin area of the Açailândia River in Maranhão. From the multicriteria evaluation, environmental information plans were used to determine the trend of water behavior, infiltration, and runoff, along with agrochemical transportation. The joint evaluation of this information was used to generate the final map of the areas of contamination risk posed by agrochemicals in the region. The hydrographic basin presented high anthropization, with an increase of approximately 27% in land use and occupation by crops in the period from 1984 to 2018. The area of 1087.62 km², corresponding to 35.9% of the basin area, presented a high and extremely high risk of contamination.
{"title":"Risk of agrochemical contamination in a hydrographic basin in the matopiba region in Brazil","authors":"Fabrina Teixeira Ferraz, L. C. J. França, Adênio Louzeiro de Aguiar Júnior, Temístocles Pacheco Lima, Fausto Weimar Acerbi Júnior","doi":"10.13083/reveng.v30i1.13813","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13813","url":null,"abstract":"The intensive use of agrochemicals has been associated with global human health problems and environmental contamination. Brazil is the world’s largest agrochemical consumer, and this position highlights the growth of agribusiness in the MATOPIBA region (Maranhão, Tocantins, Piauí, and Bahia states). The use of agrochemicals is recurrent in local agricultural practices. However, there is little information on the environmental impacts and risks of contamination regarding river basins in this region. Thus, this study aimed to evaluate the risk of contamination by agrochemicals in the basin area of the Açailândia River in Maranhão. From the multicriteria evaluation, environmental information plans were used to determine the trend of water behavior, infiltration, and runoff, along with agrochemical transportation. The joint evaluation of this information was used to generate the final map of the areas of contamination risk posed by agrochemicals in the region. The hydrographic basin presented high anthropization, with an increase of approximately 27% in land use and occupation by crops in the period from 1984 to 2018. The area of 1087.62 km², corresponding to 35.9% of the basin area, presented a high and extremely high risk of contamination.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46998504","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}
Pub Date : 2022-08-10DOI: 10.13083/reveng.v30i1.13729
B. Pereira, E. F. Coelho, F. Xavier, L. D. Souza, Luciano Silva Souza
The complexity of humic substances (HS) and their properties in agricultural applications have attracted the attention of many researchers. However, controversial results have been obtained, because of the difficulty in identifying a precise relationship between the structure and activity of these substances. This study aimed to evaluate the influence of different frequencies and concentrations of humic substances on the behavior of physical, chemical and microbiological soil attributes. The experiment was carried out at Embrapa Cassava and Fruticulture in Latossolo Amarelo Distrocoeso [(Xanthic Ferralsol (Densic); Oxisol], with a completely randomized block design with four repetitions in a split-plot scheme, with three application frequencies (F1 = 15 days, F2 = 30 days and F3 = 45 days) and four concentrations of humic substances (C1 = 0 ml.L-1, C2 = 3 ml.L-1, C3 = 6 ml.L-1 and C4 = 9 ml.L-1). The humic substance applied at a frequency of 45 days positively favored the physical and chemical attributes of the soil, mainly at concentrations of 6 and 9 ml.L-1, due to the increase in microporosity. This information can be used to improve the performance of agricultural practices, especially those related to soil preparation, use of agricultural inputs, water management, soil water content and, especially, soil management practices.
{"title":"Fertigation of humic substance: effects on soil properties of a xanthic ferralsol (DENSIC)","authors":"B. Pereira, E. F. Coelho, F. Xavier, L. D. Souza, Luciano Silva Souza","doi":"10.13083/reveng.v30i1.13729","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13729","url":null,"abstract":"The complexity of humic substances (HS) and their properties in agricultural applications have attracted the attention of many researchers. However, controversial results have been obtained, because of the difficulty in identifying a precise relationship between the structure and activity of these substances. This study aimed to evaluate the influence of different frequencies and concentrations of humic substances on the behavior of physical, chemical and microbiological soil attributes. The experiment was carried out at Embrapa Cassava and Fruticulture in Latossolo Amarelo Distrocoeso [(Xanthic Ferralsol (Densic); Oxisol], with a completely randomized block design with four repetitions in a split-plot scheme, with three application frequencies (F1 = 15 days, F2 = 30 days and F3 = 45 days) and four concentrations of humic substances (C1 = 0 ml.L-1, C2 = 3 ml.L-1, C3 = 6 ml.L-1 and C4 = 9 ml.L-1). The humic substance applied at a frequency of 45 days positively favored the physical and chemical attributes of the soil, mainly at concentrations of 6 and 9 ml.L-1, due to the increase in microporosity. This information can be used to improve the performance of agricultural practices, especially those related to soil preparation, use of agricultural inputs, water management, soil water content and, especially, soil management practices.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43185145","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}
Pub Date : 2022-08-10DOI: 10.13083/reveng.v30i1.13759
Fabiano Battemarco da Silva, G. Ferraz, J. Cunha, D. B. Marin, L. S. Santana, L.M.D. Santos
Workers in their labor activities may be subject to operational risks, such as noise. The objective of this work was to use geostatistics and Statistical Process Control (SPC) through individual charts to map and characterize the magnitude of the spatial variability of noise produced by a backhoe, to identify areas of health for workers. The experiment was developed at the technical college of the Federal Rural University of Rio de Janeiro. A 63-kW backhoe loader and a digital decibel meter were used to collect noise levels at points distributed in a regular 2.0 x 2.0 m sampling grid around the machine. The spatial dependence of the noise was analyzed by adjusting the Wave-type semi-variogram, interpolation by ordinary kriging, and SPC. It was possible to characterize the spatial dependence of noise levels produced by the backhoe as well as to carry out, through individual letters in dialogue with geostatistics, the mapping of their spatial distribution to identify healthy areas for workers. It could have been found in the evaluation of the backhoe loader control chart, that there was no reduction in the variability of noise data, which was approximately 73.29 dB(A) for the sampled points. This shows an average very close to the analysis found in the execution of the descriptive statistics of the noise generated by the backhoe loader.
工人在劳动活动中可能会受到操作风险的影响，例如噪音。这项工作的目的是利用地质统计学和统计过程控制(SPC)，通过单独的图表来绘制和描述挖土机产生的噪音的空间变异性的大小，以确定工人的健康领域。这项实验是在里约热内卢联邦农村大学的技术学院进行的。一个63千瓦的反铲装载机和一个数字分贝计被用来收集分布在机器周围一个规则的2.0 x 2.0 m采样网格上的噪声水平。通过调整波动型半变异函数、普通克里格插值和SPC分析了噪声的空间依赖性。有可能确定挖土机产生的噪音水平的空间依赖性，并通过与地质统计学对话的个别信件绘制其空间分布地图，以确定工人的健康区域。在对反铲装载机控制图的评价中可以发现，噪声数据的可变性没有减少，采样点的噪声数据的可变性约为73.29 dB(A)。这显示了一个平均值，非常接近在反铲装载机产生的噪声的描述性统计执行中发现的分析。
{"title":"Statistical process control and geostatistics on the characterization of the noise produced by a backhoe loader","authors":"Fabiano Battemarco da Silva, G. Ferraz, J. Cunha, D. B. Marin, L. S. Santana, L.M.D. Santos","doi":"10.13083/reveng.v30i1.13759","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13759","url":null,"abstract":"Workers in their labor activities may be subject to operational risks, such as noise. The objective of this work was to use geostatistics and Statistical Process Control (SPC) through individual charts to map and characterize the magnitude of the spatial variability of noise produced by a backhoe, to identify areas of health for workers. The experiment was developed at the technical college of the Federal Rural University of Rio de Janeiro. A 63-kW backhoe loader and a digital decibel meter were used to collect noise levels at points distributed in a regular 2.0 x 2.0 m sampling grid around the machine. The spatial dependence of the noise was analyzed by adjusting the Wave-type semi-variogram, interpolation by ordinary kriging, and SPC. It was possible to characterize the spatial dependence of noise levels produced by the backhoe as well as to carry out, through individual letters in dialogue with geostatistics, the mapping of their spatial distribution to identify healthy areas for workers. It could have been found in the evaluation of the backhoe loader control chart, that there was no reduction in the variability of noise data, which was approximately 73.29 dB(A) for the sampled points. This shows an average very close to the analysis found in the execution of the descriptive statistics of the noise generated by the backhoe loader.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46063139","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}
Pub Date : 2022-07-27DOI: 10.13083/reveng.v30i1.13700
Viviane Pereira do Nascimento, E. L. D. Vitória
This study aimed to evaluate the effect of the operating flight height of an unmanned aerial vehicle with different spray tip rotations on the parameters of droplet coverage, density and volumetric median diameter of the sprayed droplets, in acid lime culture ´Tahiti’. The experiment was performed in randomized blocks design, with repetition within the block, in a factorial system (3x2), with four repetitions. Three planting lines were selected for each treatment. The two outer lines were used as borders and the central one for evaluation. In each treatment, one plant was selected from the planting line and four water-sensitive papers were fixed in the middle third of the outermost portion of the canopy.A solution containing water and a drift reducing adjuvant was prepared to analyze the quality of the spray. A significant difference was found for the variables of spray tip rotation and flight height with no interaction between them. This result indicates that these variables act independently on the volumetric median diameter values. Furthermore, the spray heights of 3.0 m and 4.0 m have a notable effect on the amount of deposition. However, their influence on droplet size is negligible.
{"title":"Spraying quality using unmanned aerial vehicle in citrus","authors":"Viviane Pereira do Nascimento, E. L. D. Vitória","doi":"10.13083/reveng.v30i1.13700","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13700","url":null,"abstract":"This study aimed to evaluate the effect of the operating flight height of an unmanned aerial vehicle with different spray tip rotations on the parameters of droplet coverage, density and volumetric median diameter of the sprayed droplets, in acid lime culture ´Tahiti’. The experiment was performed in randomized blocks design, with repetition within the block, in a factorial system (3x2), with four repetitions. Three planting lines were selected for each treatment. The two outer lines were used as borders and the central one for evaluation. In each treatment, one plant was selected from the planting line and four water-sensitive papers were fixed in the middle third of the outermost portion of the canopy.A solution containing water and a drift reducing adjuvant was prepared to analyze the quality of the spray. A significant difference was found for the variables of spray tip rotation and flight height with no interaction between them. This result indicates that these variables act independently on the volumetric median diameter values. Furthermore, the spray heights of 3.0 m and 4.0 m have a notable effect on the amount of deposition. However, their influence on droplet size is negligible.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42997148","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}
Pub Date : 2022-07-25DOI: 10.13083/reveng.v30i1.11543
S. C. D. Lima, J. P. Pedroza, L. M. F. Saboya, J. M. D. Moraes Neto, D. F. D. Melo, R. F. B. Guimarães
Understanding how the use of light-emitting diodes (LED) in artificial lighting affects plant growth is of considerable interest to Science because the application of specific light wavelengths to crops can enhance agricultural production. Therefore, the influence of LED lamps in the photosynthetically active spectrum (blue and red light) on the growth of lettuce (Lactuca Sativa) was evaluated. A factorial design was used to test 4 combinations of LED lighting (5:1; 3:1; 1:1 and 6:3) and 2 lettuce varieties (butterhead and crisphead). The plants were grown in pots in a controlled environment with a 12h-photoperiod, for 21 days. Leaf number (LN), leaf area (LA) and leaf fresh mass (LFM) were determined along with gas exchange variables (A: net photosynthesis; Ci: CO2internal concentration; and WUEi: instantaneous water use efficiency. Growth of lettuce plants was greatest in the source of variation of LED lighting with the combination 5:1, as well as the greatest photosynthetic efficiency. The crisphead lettuce was superior to the butterhead lettuce in all analyzed variables, which suggests a better adaptation to the treatments applied.
{"title":"Lettuce growth promoted by artificial lighting using light-emitting diodes (LED)","authors":"S. C. D. Lima, J. P. Pedroza, L. M. F. Saboya, J. M. D. Moraes Neto, D. F. D. Melo, R. F. B. Guimarães","doi":"10.13083/reveng.v30i1.11543","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.11543","url":null,"abstract":"Understanding how the use of light-emitting diodes (LED) in artificial lighting affects plant growth is of considerable interest to Science because the application of specific light wavelengths to crops can enhance agricultural production. Therefore, the influence of LED lamps in the photosynthetically active spectrum (blue and red light) on the growth of lettuce (Lactuca Sativa) was evaluated. A factorial design was used to test 4 combinations of LED lighting (5:1; 3:1; 1:1 and 6:3) and 2 lettuce varieties (butterhead and crisphead). The plants were grown in pots in a controlled environment with a 12h-photoperiod, for 21 days. Leaf number (LN), leaf area (LA) and leaf fresh mass (LFM) were determined along with gas exchange variables (A: net photosynthesis; Ci: CO2internal concentration; and WUEi: instantaneous water use efficiency. Growth of lettuce plants was greatest in the source of variation of LED lighting with the combination 5:1, as well as the greatest photosynthetic efficiency. The crisphead lettuce was superior to the butterhead lettuce in all analyzed variables, which suggests a better adaptation to the treatments applied.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44391591","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}
Pub Date : 2022-07-04DOI: 10.13083/reveng.v30i1.13461
P. E. R. Eberhardt, L. O. B. Schuch, V. V. Mondo, D. Franco, Letícia Ramon de Medeiros, A. Radke
The aim of this study was to evaluate the use of pollinator seed mixture to obtain hybrid rice seeds. The study was performed at Embrapa Clima Temperado, in the harvests of 2015/2016 and 2016/2017. Seeds of hybrids H7 and BRS AH 703 CL and the pollinator, Puitá INTA-CL cultivar were used in the proportions of 0.00%, 0.75%, 1.50%, 3.00%, 6.00%, 12.00% and 24.00% in the first year and 0.00%, 0.75%, 1.50%, 3.00%, 6.00%, 12.00% and 24.00%, 50.00% and 100.00% for the second year. The experimental design was a randomized complete block design with four repetitions and the data was submitted to analysis of variance. Seeding was performed in November and October. The plots were 5 meters long with 4 meters of plot area, being evaluated: Number of plants.m-2, Number of culms.m-2, Number of panicles.m-2, Panicle length, Productivity of grain, plot uniformity, plant height, percentage of whole grains, broken grains. Plants from hybrid rice seeds in the mix had no effect on yield components. Plants from hybrid seeds showed plot uniformity like plants from self-fertilization. The industrial quality of the grains was like grains of self-fertilized plants but differing in the intermediate mixtures used.
{"title":"Intraspecific competition of hybrids using mixtures of pollinator lines for hybrid rice production","authors":"P. E. R. Eberhardt, L. O. B. Schuch, V. V. Mondo, D. Franco, Letícia Ramon de Medeiros, A. Radke","doi":"10.13083/reveng.v30i1.13461","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13461","url":null,"abstract":"The aim of this study was to evaluate the use of pollinator seed mixture to obtain hybrid rice seeds. The study was performed at Embrapa Clima Temperado, in the harvests of 2015/2016 and 2016/2017. Seeds of hybrids H7 and BRS AH 703 CL and the pollinator, Puitá INTA-CL cultivar were used in the proportions of 0.00%, 0.75%, 1.50%, 3.00%, 6.00%, 12.00% and 24.00% in the first year and 0.00%, 0.75%, 1.50%, 3.00%, 6.00%, 12.00% and 24.00%, 50.00% and 100.00% for the second year. The experimental design was a randomized complete block design with four repetitions and the data was submitted to analysis of variance. Seeding was performed in November and October. The plots were 5 meters long with 4 meters of plot area, being evaluated: Number of plants.m-2, Number of culms.m-2, Number of panicles.m-2, Panicle length, Productivity of grain, plot uniformity, plant height, percentage of whole grains, broken grains. Plants from hybrid rice seeds in the mix had no effect on yield components. Plants from hybrid seeds showed plot uniformity like plants from self-fertilization. The industrial quality of the grains was like grains of self-fertilized plants but differing in the intermediate mixtures used.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45677702","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}
Pub Date : 2022-06-23DOI: 10.13083/reveng.v30i1.13333
Igor Galvão Santana, Annelisa Arruda de Brito, F. C. Aguiar, L. F. C. Campos, G. D. C. Corrêa, A. R. Nascimento, L. C. Cunha Junior
The use of high productive-potential hybrids was one of the reasons for the increase in productivity in the agricultural segment of tomatoes for industrial processing. Thus, among the cultivars available on the market, in general, those that combine greater productivity with quality and that satisfy the needs of industries are chosen. In this context, the objective of this work was to evaluate the best time to implement near-infrared spectroscopy (NIRS) as an alternative method for identifying industrial tomato hybrids. Seeds from the hybrids: CRV8126, H9553, HMX4890, TPX28699 were used and 10 spectra were collected from a set of 20 seeds, from cotyledonary leaves of ten seedlings at 15 days after sowing (DAS) and from the true leaf of ten seedlings at 30 DAS. The results showed that the technique of spectroscopy in the near-infrared range, associated with multivariate analysis, allowed the discrimination of the studied hybrids. The phase in which the best results were obtained in the identification of each hybrid was in the seed, obtaining accuracy values above 90.00% and sensitivity of 100.00%, which proves the use of this instrumental technique on a portable scale for tomato hybrids with a high assertiveness rate.
{"title":"An alternative method for identification of industrial tomato hybrids using NIRS","authors":"Igor Galvão Santana, Annelisa Arruda de Brito, F. C. Aguiar, L. F. C. Campos, G. D. C. Corrêa, A. R. Nascimento, L. C. Cunha Junior","doi":"10.13083/reveng.v30i1.13333","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13333","url":null,"abstract":"The use of high productive-potential hybrids was one of the reasons for the increase in productivity in the agricultural segment of tomatoes for industrial processing. Thus, among the cultivars available on the market, in general, those that combine greater productivity with quality and that satisfy the needs of industries are chosen. In this context, the objective of this work was to evaluate the best time to implement near-infrared spectroscopy (NIRS) as an alternative method for identifying industrial tomato hybrids. Seeds from the hybrids: CRV8126, H9553, HMX4890, TPX28699 were used and 10 spectra were collected from a set of 20 seeds, from cotyledonary leaves of ten seedlings at 15 days after sowing (DAS) and from the true leaf of ten seedlings at 30 DAS. The results showed that the technique of spectroscopy in the near-infrared range, associated with multivariate analysis, allowed the discrimination of the studied hybrids. The phase in which the best results were obtained in the identification of each hybrid was in the seed, obtaining accuracy values above 90.00% and sensitivity of 100.00%, which proves the use of this instrumental technique on a portable scale for tomato hybrids with a high assertiveness rate.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44092813","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}
Pub Date : 2022-06-20DOI: 10.13083/reveng.v30i1.13390
J. S. Pereira, G. Ferraz, L. S. Santana
Images obtained by Remotely Piloted Aircraft (RPA) used to monitor the crop can help evaluate leaf mass, plant formation, and plant population. In this context, the objectives of this study were to analyze plant growth in a grapevine crop trained in the trellis system, detect failures and determine the plant covered area using images obtained by RPA. The flight was parameterized with frontal overlap of 75%, lateral overlap of 70%, Ground Sample Distance (GSD) of 60 m, and flight speed of 5 m.s-1, using a sensor in the visible range. Processed images showed a stand 3% smaller than projected, an area covered by vine branches occupying 60.8%, undergrowth and invasives represented 5.3%, and exposed soil 33.9%. Vines were identified in the vegetation indices as green points, invasive plants as yellow points, and exposed soil as red points. Image processing obtained with RPA allowed identification of plants in various stages of development, with predominance of vines in the formation process. It was possible to identify the plants and quantify the leaf mass using the MPRI vegetation index, as well as to differentiate exposed soil from plant material. It was also observed that the plot had an incomplete stand at the time the flight was performed.
{"title":"Aerial images to monitor grapevine vegetative growth","authors":"J. S. Pereira, G. Ferraz, L. S. Santana","doi":"10.13083/reveng.v30i1.13390","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13390","url":null,"abstract":"Images obtained by Remotely Piloted Aircraft (RPA) used to monitor the crop can help evaluate leaf mass, plant formation, and plant population. In this context, the objectives of this study were to analyze plant growth in a grapevine crop trained in the trellis system, detect failures and determine the plant covered area using images obtained by RPA. The flight was parameterized with frontal overlap of 75%, lateral overlap of 70%, Ground Sample Distance (GSD) of 60 m, and flight speed of 5 m.s-1, using a sensor in the visible range. Processed images showed a stand 3% smaller than projected, an area covered by vine branches occupying 60.8%, undergrowth and invasives represented 5.3%, and exposed soil 33.9%. Vines were identified in the vegetation indices as green points, invasive plants as yellow points, and exposed soil as red points. Image processing obtained with RPA allowed identification of plants in various stages of development, with predominance of vines in the formation process. It was possible to identify the plants and quantify the leaf mass using the MPRI vegetation index, as well as to differentiate exposed soil from plant material. It was also observed that the plot had an incomplete stand at the time the flight was performed.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47467882","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}
Pub Date : 2022-06-10DOI: 10.13083/reveng.v30i1.13407
Carolina Fogliarini Parcianello, Catize Brandelero, Valmir Werner, G. M. Bertollo, Lucas Caye da Silva, Luigi de Almeida Rodrigues, Alexandre Russini
Brushcutters use different cutting tools with variations in operating capacity. Thus, the present study evaluate the effective operational capacity of a brushcutter equipped with different cutting tools in different areas of plant cover. It was subdivided into three experiments with 44 replicates of 4m2 each. The first was carried out in an area with plants cover with wheat and ryegrass, with blades of triple and double discs, and double wire. The second was carried out in another area with a cover composed of wheat, ryegrass, and fallow (composed of different species plants), with double- and triple-discs blades. The last experiment was carried out in a fallow area, with all cutting tools, except for the double wire. The results indicate that the brushcutter equipped with the triple-disc blade had greater operational capacity compared to the other cutting tools. For a working day of 8 h.day-1, the highest amount of mowed biomass was obtained with the triple-disc blade in areas with ryegrass and wheat cover, while for the fallow area, there is no significant difference between the double- and triple-disc blades. The adequate selection of the cutting tool contributes to the increase of the cut biomass in a shorter time, reducing the exposition of the operator to the vibrations and noise produced by the machine.
{"title":"Effective operational capacity of brushcutter with different cutting tools","authors":"Carolina Fogliarini Parcianello, Catize Brandelero, Valmir Werner, G. M. Bertollo, Lucas Caye da Silva, Luigi de Almeida Rodrigues, Alexandre Russini","doi":"10.13083/reveng.v30i1.13407","DOIUrl":"https://doi.org/10.13083/reveng.v30i1.13407","url":null,"abstract":"Brushcutters use different cutting tools with variations in operating capacity. Thus, the present study evaluate the effective operational capacity of a brushcutter equipped with different cutting tools in different areas of plant cover. It was subdivided into three experiments with 44 replicates of 4m2 each. The first was carried out in an area with plants cover with wheat and ryegrass, with blades of triple and double discs, and double wire. The second was carried out in another area with a cover composed of wheat, ryegrass, and fallow (composed of different species plants), with double- and triple-discs blades. The last experiment was carried out in a fallow area, with all cutting tools, except for the double wire. The results indicate that the brushcutter equipped with the triple-disc blade had greater operational capacity compared to the other cutting tools. For a working day of 8 h.day-1, the highest amount of mowed biomass was obtained with the triple-disc blade in areas with ryegrass and wheat cover, while for the fallow area, there is no significant difference between the double- and triple-disc blades. The adequate selection of the cutting tool contributes to the increase of the cut biomass in a shorter time, reducing the exposition of the operator to the vibrations and noise produced by the machine.","PeriodicalId":33461,"journal":{"name":"Engenharia na Agricultura","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44375683","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}
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