cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.6084/m9.figshare.19929080.v1
title: Yield performance of taro (Colocasia esculenta L.) cultivated with topdressing nitrogen rates at the Zona da Mata region of Minas Gerais

description: ABSTRACT Response of taro to amount of nitrogen applied and time of application has been the subject of discussion. The objective of this study was to evaluate the effect of nitrogen topdressing on taro yield. Two experiments were conducted in Oratórios - MG from September 2010 to July 2011 (Year 1) and from September 2011 to July 2012 (Year 2). Both experiments were arranged in a randomized block design, with four replications. The treatments consisted of five N rates (0; 40; 60; 80 and 160 kg ha-1) applied as topdressing at urea form. The corms of Japanese clone (BGH 5925) were planted in the 0.90 x 0.30 m spacing. In the two experimental years, yield increased in almost all corm classes with the increase in N rates. The estimated maximum yields of marketable corms were 22.23 Mg ha-1 in Year 1 and 9.81 Mg ha-1 in Year 2, with 109 and 118 kg ha-1 of N, respectively. The total number of corms per plant was similar in both years (16.45 corms/plant in Year 1 and 17.76 corms/plant in Year 2). Unmarketable corms represented 35.32 and 46.51% of the total per plant, in Year 1 and Year 2, respectively, indicating less corm growth in Year 2. The curve of taro response to topdressing N rates was similar in the two years and, the estimates were influenced by the difference in rainfall between the years. With the management of nitrogen fertilization, the maximum yield of marketable taro corms was achieved with N rates varying from 109 to 118 kg ha-1.
DOI: 10.6084/m9.figshare.19929081.v1
title: Inspection of solid fertilizer spreaders in south-central region of Paraná

description: ABSTRACT Rotary spreaders, are indispensable in modern agriculture due to several functions that can perform. But regulation and maintenance of such equipment most often is unsatisfactory, causing losses through lost productivity due to overlapping of past problems caused by fertilizer deficit. Based on these assumptions, the aim of the present work inspect and raise critical points of the distributors of fertilizers to haul in the South Central region of Paraná state. A checklist has been developed, in which through field visits, were inspected. The machines had various problems of maintenance and regulation, especially regulation of the angle of the vanes in 59% of inspections. All inspected spreaders are deprecated, because they presented the coefficient of variation above 20%. The fertilizer spreaders inspection program is of great value and should be mandatory in the states of increased agricultural production of Brazil.
DOI: 10.6084/m9.figshare.19929081
title: Inspection of solid fertilizer spreaders in south-central region of Paraná

description: ABSTRACT Rotary spreaders, are indispensable in modern agriculture due to several functions that can perform. But regulation and maintenance of such equipment most often is unsatisfactory, causing losses through lost productivity due to overlapping of past problems caused by fertilizer deficit. Based on these assumptions, the aim of the present work inspect and raise critical points of the distributors of fertilizers to haul in the South Central region of Paraná state. A checklist has been developed, in which through field visits, were inspected. The machines had various problems of maintenance and regulation, especially regulation of the angle of the vanes in 59% of inspections. All inspected spreaders are deprecated, because they presented the coefficient of variation above 20%. The fertilizer spreaders inspection program is of great value and should be mandatory in the states of increased agricultural production of Brazil.
DOI: 10.6084/m9.figshare.19929083
title: Production of aroeira of sertão seedlings (Myracrodruon urundeuva Allemão) in organic waste

description: ABSTRACT The aroeira is a species of great importance due to the diverse uses of its wood. However, it is on the list of endangered species due to predatory exploitation. Due to the low technology used in the production of seedlings this study aimed to evaluate the development seedlings aroeira-do-sertão (Myracrodruon urundeuva Allemão) using different organic waste in different concentrations. As substrate it was used cattle manure, sheep manure, earthworm humus, waste originating from the coffee grounding and roasting process. The experimental design was completely randomized in a factorial 4 x 4 (organic waste x residue levels) consisting of sixteen treatment and five replications. Superior results were achieved when sheep manure was used for the Dickison quality index, dry root weight and total dry weight, with maximum efficiency at a concentration of 66%. For the other variables, it was observed no variation compared to the earthworm humus. The coffee residue caused allelopathic effects, even in low concentrations and is not recommended for substrate formulation. In most of the variables, cattle manure behaved averagely with a decrease of variables depending on the concentrations. The manure of sheep and worm humus are recommended for the production of urunday seedlings at concentrations of 66 and 33% respectively.
DOI: 10.6084/m9.figshare.19929083.v1
title: Production of aroeira of sertão seedlings (Myracrodruon urundeuva Allemão) in organic waste

description: ABSTRACT The aroeira is a species of great importance due to the diverse uses of its wood. However, it is on the list of endangered species due to predatory exploitation. Due to the low technology used in the production of seedlings this study aimed to evaluate the development seedlings aroeira-do-sertão (Myracrodruon urundeuva Allemão) using different organic waste in different concentrations. As substrate it was used cattle manure, sheep manure, earthworm humus, waste originating from the coffee grounding and roasting process. The experimental design was completely randomized in a factorial 4 x 4 (organic waste x residue levels) consisting of sixteen treatment and five replications. Superior results were achieved when sheep manure was used for the Dickison quality index, dry root weight and total dry weight, with maximum efficiency at a concentration of 66%. For the other variables, it was observed no variation compared to the earthworm humus. The coffee residue caused allelopathic effects, even in low concentrations and is not recommended for substrate formulation. In most of the variables, cattle manure behaved averagely with a decrease of variables depending on the concentrations. The manure of sheep and worm humus are recommended for the production of urunday seedlings at concentrations of 66 and 33% respectively.
DOI: 10.6084/m9.figshare.19929084
title: Comparative study of epidural anesthesia in dogs by weight or occipito-coccygeal distance

description: ABSTRACT The effects of volume on lumbosacral epidural block in dogs were evaluated using two different doses of 2% lidocaine. Ten adult dogs, without defined breed, were subjected to two different anesthetic protocols. In the first, the local anesthetic was calculated based on the body weight (GP), wherein 1.0 mL of local anesthetic was used for each 3.5 kg; in the second protocol, the dose was stipulated according to the occipito-coccygeal (DG) distance with 1.5mL of local anesthetic for every 10 cm of distance. The available time, recovery period, extent of block, and rectal temperature were measured. After the analysis of the results, it was possible to verify that there was an increase in the time in GD when compared with GP, due to the greater volume administered in that group. The recovery period remained similar in both groups, despite the use of different doses. Regarding the extent of blockade, there was an increase in GD in relation to GP due to the increase of the local anesthetic dose. On the other hand, the rectal temperature presented a difference between the groups, remaining lower and below the reference values for the species in GD compared with GP at all moments analyzed, possibly due to a sympathetic action triggered by the cranial extension of the epidural block. It could be concluded that when a longer time and a more cranial blockade of epidural anesthesia are desired, the anesthesia volume should be based on the occipito-coccygeal distance, however, observing the rectal temperature.
DOI: 10.6084/m9.figshare.19929084.v1
title: Comparative study of epidural anesthesia in dogs by weight or occipito-coccygeal distance

description: ABSTRACT The effects of volume on lumbosacral epidural block in dogs were evaluated using two different doses of 2% lidocaine. Ten adult dogs, without defined breed, were subjected to two different anesthetic protocols. In the first, the local anesthetic was calculated based on the body weight (GP), wherein 1.0 mL of local anesthetic was used for each 3.5 kg; in the second protocol, the dose was stipulated according to the occipito-coccygeal (DG) distance with 1.5mL of local anesthetic for every 10 cm of distance. The available time, recovery period, extent of block, and rectal temperature were measured. After the analysis of the results, it was possible to verify that there was an increase in the time in GD when compared with GP, due to the greater volume administered in that group. The recovery period remained similar in both groups, despite the use of different doses. Regarding the extent of blockade, there was an increase in GD in relation to GP due to the increase of the local anesthetic dose. On the other hand, the rectal temperature presented a difference between the groups, remaining lower and below the reference values for the species in GD compared with GP at all moments analyzed, possibly due to a sympathetic action triggered by the cranial extension of the epidural block. It could be concluded that when a longer time and a more cranial blockade of epidural anesthesia are desired, the anesthesia volume should be based on the occipito-coccygeal distance, however, observing the rectal temperature.
DOI: 10.6084/m9.figshare.19929086.v1
title: Factors limiting the implementation of mechanical harvesting of sugarcane in Campos dos Goytacazes, RJ, Brazil

description: ABSTRACT The objective of this research was to identify and characterize the main technical factors that affect the deployment of the mechanized harvesting of sugarcane in Campos dos Goytacazes, Rio de Janeiro, Brazil. In general, it can be stated there were restrictive factors related to machinery, administrative management, and technical planning. We identified significant technical restrictions in the planting system, particularly in relation to the size and shape of the plots, length of the rows, row spacing, and inadequate varieties. For efficient use of mechanized harvesting, a technical planning is necessary with changes in the cropping system, adopting wider and more uniform plots regarding to its format, with rows over 500 m length and row spacing of 1.50 m and upright, productive, and deep-rooted varieties.
DOI: 10.6084/m9.figshare.19929087
title: Modelación espacial de la Sigatoka negra (Mycosphaerella fijiensis M. Morelet) en banano cv. Gran Enano

description: RESUMEN Mycosphaerella fijiensis M. Morelet, es uno de los agentes causales del “complejo Sigatoka”, el cual, es la enfermedad más destructiva en los cultivos de banano y plátano. En el presente trabajo, se modeló espacialmente mediante técnicas geoestatísticas, la hoja más joven manchada (HMJM), como variable biológica indicadora del estado de severidad de la enfermedad en la plantación, con el objetivo de determinar su estructura y categoría de dependencia espacial. La HMJM se evaluó en las semanas 43, 45, 46 y 47 de 2005, em 71 plantas de banano cv. Gran Enano con emisión reciente de su inflorescencia, ubicadas en las intersecciones de una malla irregular, con una distancia mínima entre pares de plantas de 21 m y una distancia máxima de 1077 m, en una finca bananera situada en el municipio de Carepa (Antioquia), zona de vida bosque húmedo tropical (bh-T). La variable presentó un comportamiento anisotrópico para las semanas 45, 46 y 47; éste, se describió a partir de un modelo gaussiano en cada una de las semanas, con un rango de dependencia espacial decreciente de 673.25, 345.53 y 296.36 m, respectivamente, el cual diverge de los modelos reportados en otras investigaciones en patosistemas similares. Los modelos que se ajustaron para las semanas 45 y 47, evidenciaron fuerte dependencia espacial; el modelo de la semana 46, moderada dependencia espacial y el modelo de la semana 43, nula dependencia espacial.
DOI: 10.6084/m9.figshare.19929087.v1
title: Modelación espacial de la Sigatoka negra (Mycosphaerella fijiensis M. Morelet) en banano cv. Gran Enano

description: RESUMEN Mycosphaerella fijiensis M. Morelet, es uno de los agentes causales del “complejo Sigatoka”, el cual, es la enfermedad más destructiva en los cultivos de banano y plátano. En el presente trabajo, se modeló espacialmente mediante técnicas geoestatísticas, la hoja más joven manchada (HMJM), como variable biológica indicadora del estado de severidad de la enfermedad en la plantación, con el objetivo de determinar su estructura y categoría de dependencia espacial. La HMJM se evaluó en las semanas 43, 45, 46 y 47 de 2005, em 71 plantas de banano cv. Gran Enano con emisión reciente de su inflorescencia, ubicadas en las intersecciones de una malla irregular, con una distancia mínima entre pares de plantas de 21 m y una distancia máxima de 1077 m, en una finca bananera situada en el municipio de Carepa (Antioquia), zona de vida bosque húmedo tropical (bh-T). La variable presentó un comportamiento anisotrópico para las semanas 45, 46 y 47; éste, se describió a partir de un modelo gaussiano en cada una de las semanas, con un rango de dependencia espacial decreciente de 673.25, 345.53 y 296.36 m, respectivamente, el cual diverge de los modelos reportados en otras investigaciones en patosistemas similares. Los modelos que se ajustaron para las semanas 45 y 47, evidenciaron fuerte dependencia espacial; el modelo de la semana 46, moderada dependencia espacial y el modelo de la semana 43, nula dependencia espacial.
DOI: 10.6084/m9.figshare.19929086
title: Factors limiting the implementation of mechanical harvesting of sugarcane in Campos dos Goytacazes, RJ, Brazil

description: ABSTRACT The objective of this research was to identify and characterize the main technical factors that affect the deployment of the mechanized harvesting of sugarcane in Campos dos Goytacazes, Rio de Janeiro, Brazil. In general, it can be stated there were restrictive factors related to machinery, administrative management, and technical planning. We identified significant technical restrictions in the planting system, particularly in relation to the size and shape of the plots, length of the rows, row spacing, and inadequate varieties. For efficient use of mechanized harvesting, a technical planning is necessary with changes in the cropping system, adopting wider and more uniform plots regarding to its format, with rows over 500 m length and row spacing of 1.50 m and upright, productive, and deep-rooted varieties.
DOI: 10.6084/m9.figshare.19929090.v1
title: Production of cultivars of iceberg lettuce under two cropping systems

description: ABSTRACT The lettuce is grown in all regions of Brazil, however, there are restrictions on its cultivation, due to its sensitivity to the adverse conditions of temperature, humidity and water availability. In this context, the aim of this study was to evaluate the production of four lettuce cultivars under two cropping systems. The experimental design was randomized blocks in a split-plot scheme. The plots consisted of two cropping systems (low polyethylene tunnel and open field), and the sub plots of four lettuce cultivars (Angelina, Rubette, Grandes Lagos 659 and Tainá) with four replications. The characteristics evaluated were: plant height, overall diameter of the plant, transverse head diameter, stem length, stem diameter, stem fresh weight, number of commercial and non-commercial leaves, commercial and non-commercial fresh weight. Analysis of variance was performed and means were compared by Tukey test. The low tunnel favors the growth and production of lettuce cultivars in relation to open field. Cultivar Rubette shows growth and production superior to the other cultivars in both cropping systems.
DOI: 10.6084/m9.figshare.19929089
title: Growth, yield and fiber quality of cotton color influenced by the plant population

description: ABSTRACT The objective of this study was to evaluate the growth, the productivity and fiber quality of color cotton in different plant populations. Was adopted the design in randomized blocks, in factorial scheme 5 x 8 for the growth variables and unifatorial for the production components, with four replications. The factors were plant populations (125,000; 41,667; 25,000; 17,857; and 13,889 plants ha-1) and evaluation periods (15; 30; 45; 60; 75; 90; 105 and 120 days after emergence). Five different plant densities were used to compose the plant populations, 10; 3.3; 2; 1.42; and 1.1 plants per meter. The experimental units presented 4 m wide, 6 m long and 6 plant lines spaced 0.80 meters between rows and the two central ones, the useful area. Were evaluated plant height, stem diameter, leaf area, number of bolls per m², number of bolls per plant, weight of fruits per plant, productivity of seed cotton, productivity of lint and technological characteristics of fiber. The increase in plant population reduces the stem diameter, plant height, leaf area, the number of fruits and weight of fruits per plant, but does not influence the number of bolls per m². The highest yield of seed cotton and fiber of cotton were obtained the populations of 71,471 and 72,964 plants ha-1, respectively. The technological characteristics of fiber, short fiber index, tear strength and spinning index are improved with the cultivation of 125,000 ha-1 plants.
DOI: 10.6084/m9.figshare.19929089.v1
title: Growth, yield and fiber quality of cotton color influenced by the plant population

description: ABSTRACT The objective of this study was to evaluate the growth, the productivity and fiber quality of color cotton in different plant populations. Was adopted the design in randomized blocks, in factorial scheme 5 x 8 for the growth variables and unifatorial for the production components, with four replications. The factors were plant populations (125,000; 41,667; 25,000; 17,857; and 13,889 plants ha-1) and evaluation periods (15; 30; 45; 60; 75; 90; 105 and 120 days after emergence). Five different plant densities were used to compose the plant populations, 10; 3.3; 2; 1.42; and 1.1 plants per meter. The experimental units presented 4 m wide, 6 m long and 6 plant lines spaced 0.80 meters between rows and the two central ones, the useful area. Were evaluated plant height, stem diameter, leaf area, number of bolls per m², number of bolls per plant, weight of fruits per plant, productivity of seed cotton, productivity of lint and technological characteristics of fiber. The increase in plant population reduces the stem diameter, plant height, leaf area, the number of fruits and weight of fruits per plant, but does not influence the number of bolls per m². The highest yield of seed cotton and fiber of cotton were obtained the populations of 71,471 and 72,964 plants ha-1, respectively. The technological characteristics of fiber, short fiber index, tear strength and spinning index are improved with the cultivation of 125,000 ha-1 plants.
DOI: 10.6084/m9.figshare.19929090
title: Production of cultivars of iceberg lettuce under two cropping systems

description: ABSTRACT The lettuce is grown in all regions of Brazil, however, there are restrictions on its cultivation, due to its sensitivity to the adverse conditions of temperature, humidity and water availability. In this context, the aim of this study was to evaluate the production of four lettuce cultivars under two cropping systems. The experimental design was randomized blocks in a split-plot scheme. The plots consisted of two cropping systems (low polyethylene tunnel and open field), and the sub plots of four lettuce cultivars (Angelina, Rubette, Grandes Lagos 659 and Tainá) with four replications. The characteristics evaluated were: plant height, overall diameter of the plant, transverse head diameter, stem length, stem diameter, stem fresh weight, number of commercial and non-commercial leaves, commercial and non-commercial fresh weight. Analysis of variance was performed and means were compared by Tukey test. The low tunnel favors the growth and production of lettuce cultivars in relation to open field. Cultivar Rubette shows growth and production superior to the other cultivars in both cropping systems.
DOI: 10.6084/m9.figshare.19929092
title: Sample dimension for evaluating physical and chemical characters of wild passion fruit

description: ABSTRACT The objective of this study was to determine the sample size required to evaluate physical and chemical characters of Passiflora foetida fruits. A hundred and fifty fruits were randomly harvested from plants grown in a greenhouse. In the laboratory, these fruits were measured for 12 characters (length, equatorial diameter, fruit mass, bark mass, pulp mass, pulp yield, seed weight per fruit, number of seeds per fruit, seed mass per fruit, titratable acidity, soluble solids, and ratio) and the measures of central tendency and dispersion were calculated and checked for normality. The bootstrap percentile confidence interval was determined, from the simulation of 4,000, for 150 sample sizes (1, 2, ..., 150 fruits) measured for each character. The physical and chemical characteristics evaluated in mature fruits of P. foetida exhibit different experimental accuracies and require different sample sizes. To measure only the longitudinal length, equatorial diameter and the relationship among these six fruits are sufficient to estimate the average estimation error with a 5% average. If we consider all the physical and chemical characters of ripe fruit in this work, at least 39 fruits are required, assuming 10% error of the estimated average.
DOI: 10.6084/m9.figshare.19929092.v1
title: Sample dimension for evaluating physical and chemical characters of wild passion fruit

description: ABSTRACT The objective of this study was to determine the sample size required to evaluate physical and chemical characters of Passiflora foetida fruits. A hundred and fifty fruits were randomly harvested from plants grown in a greenhouse. In the laboratory, these fruits were measured for 12 characters (length, equatorial diameter, fruit mass, bark mass, pulp mass, pulp yield, seed weight per fruit, number of seeds per fruit, seed mass per fruit, titratable acidity, soluble solids, and ratio) and the measures of central tendency and dispersion were calculated and checked for normality. The bootstrap percentile confidence interval was determined, from the simulation of 4,000, for 150 sample sizes (1, 2, ..., 150 fruits) measured for each character. The physical and chemical characteristics evaluated in mature fruits of P. foetida exhibit different experimental accuracies and require different sample sizes. To measure only the longitudinal length, equatorial diameter and the relationship among these six fruits are sufficient to estimate the average estimation error with a 5% average. If we consider all the physical and chemical characters of ripe fruit in this work, at least 39 fruits are required, assuming 10% error of the estimated average.