Rendimento acadêmico e sua relação com os estilos de personalidade de estudantes universitários

One of the Psychology challenges, especially among the assessment and educational areas, is to understand and predict individual differences. In this context, this research aimed to verify the personality styles of students with high and low academic performance. The study included 236 university students from Petrolina-PE and Juazeiro-BA campus of the UNIVASF (Universidade Federal do Vale do São Francisco). They were uniformly distributed in four disciplines (medicine, psychology, administration and civil engineering), 10 students from each semester (five highest scores average students and five lowest scores average students) took place of the sample. The Millon Index Personality Styles (MIPS) was applied to analyze the personality/behavioral styles of the students. The MIPS is a 180 dichotomous (true/false) item scale. It was also developed and applied a questionnaire about the students characteristics and their academic information. Descriptive and central tendency statistics analysis (mean, standard deviation, frequency and percentage) were done to provide sample information. Then we performed a Mann-Whitney test in the overall sample and in each course and a factorial ANOVA. The results suggest that the university population is heterogeneous and there are significant differences (p <0.05) between the personality styles of students with high and low academic performance, when analyzing the overall sample and in courses of different areas of knowledge. Students of Medicine who have higher performance as personality styles prevalent the conformism and compliance, while students with lower income in this course, the styles are: innovation and discrepancy. Psychology students with higher income are more systematic and lower income students to score significantly on accommodation. The civil engineering students of the two groups differed only in personality style intuition, being such a style more characteristic of higher income students. Students of Management with higher yield stand out more in the style of the doubt and lower yields in these styles: individual, reflection and discrepancy. This study is correlational, but had an exploratory nature because there are no studies about this relationship in Brazil. Therefore, it provided a better understanding of the action characteristics of students with high and low academic performance. Further studies using the Big Five Personality Factors instruments are required because it is the most used model in understanding the influence of personality on students performance. This way, the relation between personality and academic performance will be better discussed. Otherwise, it will be possible to compare with the existing studies in the area

Aplicação de silício em arroz de terras altas irrigado por aspersão

The use of chemical elements considered as beneficial to crops has become common among farmers. The silicon case is interesting, since despite not being essential physiologically for rice crop, it demonstrates that through its absorption it promotes benefits. Therefore, this experiment aimed to evaluate the effect of doses of SiO(2) (0, 150, 300, 450, 600, 750 and 900 kg ha(-1)) at seed sowing time, in two upland rice cultivars (IAC 201 and IAC 202), under sprinkler irrigation, during the agricultural years of 2002/03 and 2003/04 in Selviria, Mato Grosso do Sul State, Brazil. The cultivar IAC 202 can present higher yield than IAC 201, with similar industrial quality and lower laying index. Silicon applications were not sufficient to reduce laying index of IAC 201. In general, silicon application does not interfere in grain productivity and industrial yield of the cultivars used.

Desempenho agronômico de híbridos de milho, em função da aplicação foliar de fungicidas

The objective of the study was to evaluate the agronomic performance of corn hybrids (AG 8088, BG 7049, CD 327, CD 384, CD 351 and CD 321) at function of the foliar application of two fungicides (piraclostrobina + epoxiconazol and azoxistrobina + ciproconazol) at pre-tasseling of the culture. The experiment was conducted In Selviria - MS, in the experimental Farm of the Faculty of Engineering of Ilha Solteira - SP (UNESP), Brazil, during the harvest of 2008/09. The treatments were disposed in randomized complete block design in a factorial scheme 6 x 3 (corn hybrids x fungicides), with four replications. There was valued plant height and of insertion of the ear, number of rows of grains by ear and of grains by row, incidence of foliar diseases, weight of hundred grains and productivity. The results were submitted to the analysis of variance, and the hybrids and fungicides compared by Tukey test (P<0.05). For data analysis were used the software SISVAR. The foliar application of the fungicides piraclostrobina + epoxiconazol and azoxistrobina + ciproconazol in pre-tasseling of the culture the corn reduced the incidence of foliar diseases, nevertheless, was not sufficient to provoke growth of productivity. The hybrids CD 321, AG 8088 and CD 351 were highlighted by the higher yield obtained.

Desenvolvimento de uma rota química alternativa de síntese de SrCo0,8Fe0,2O3- e LaNi0,3Co0,7O3- para aplicação na reação de oxidação do CO

This thesis focuses on the coprecipitation synthesis method for preparation of ceramic materials with perovskite structure, their characterization and application as catalytic material in the reaction of converting CO to CO2 developing a methodological alternative route of synthesis from the middle via oxalate coprecipitation material SrCo0,8Fe0,2O3-d. In order to check the influence of this method, it was also synthesized using a combined citrate - EDTA complexing method. The material was characterized by: X-ray diffraction (XRD), Rietveld refinement method, thermogravimetry and differential thermo analysis (TG / DTA), scanning (SEM) and transmission (TEM) electron microscopy, particle size distribution and surface analysis method BET. Both methods led to post-phase synthesis, with pH as a relevant parameter. The synthesis based on the method via oxalate coprecipitation among particles led to the crystalline phase as those obtained using a combined citrate - EDTA complexing method under the same conditions of heat treatment. The nature of the reagent used via oxalate coprecipitation method produced a material with approximately 80 % lower than the average size of crystallites. Moreover, the via oxalate coprecipitation method precursors obtained in the solid state at low temperature (~ 26 oC), shorter synthesis, greater thermal stability and a higher yield of around 90-95 %, maintaining the same order of magnitude the crystallite size that the combined citrate - EDTA complexing method. For purposes of comparing the catalytic properties of the material was also synthesized by the using a combined citrate - EDTA complexing method. The evaluation of catalytic materials SrCo0,8Fe0,2O3-d LaNi0,3Co0,7O3-d was accompanied on the oxidation of CO to CO2 using a stainless steel tubular reactor in the temperature range of 75-300 oC. The conversion CO gas was evaluated in both materials on the results shaved that the firm conversion was loves for the material LaNi0,3Co0,7O3-d

Uso de paclobutrazol como estratégia para redução do porte e da brotação lateral de plantas de tomateiro

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Condução de melão rendilhado sob cultivo protegido

Estudou-se o comportamento de dois híbridos de melão rendilhado (Bônus nº 2 - polpa verde e D. Carlos - polpa salmão), conduzidos com uma ou duas hastes, em três diferentes posições de fixação dos frutos (5º ao 8º, 9º ao 11º e 12º ao 15º nó). Adotou-se delineamento de blocos ao acaso, com três repetições, no esquema fatorial 2 X 2 X 3. O experimento foi conduzido no segundo semestre de 1998, em região de clima Cwa. Realizou-se plantio em fileira única, com espaçamento de 1,25 m entre linhas e 0,25 m entre plantas, com irrigação por gotejamento, em casa de vegetação tipo arco, com laterais abertas, sendo as plantas conduzidas alternadamente uma para cada lado, em forma de V; adotou-se o limite de dois frutos por planta. Ocorreram interações entre híbridos e posições de fixação do fruto para altura de fixação do fruto, entre híbrido e sistema de condução para conteúdo de sólidos solúveis, entre sistema de condução e posição de fixação do fruto para número médio de frutos por planta e produção total de frutos por planta. Plantas conduzidas com duas hastes apresentaram maior distância entre o solo e o nó de fixação do fruto (55,17 cm), em relação às com uma haste (39,50 cm) para os dois híbridos. O híbrido Bônus nº 2 apresentou maior quantidade de matéria seca por planta, na floração (22,61 g) e na colheita (74,34 g), maior área foliar por planta, na floração (0,3613 m²) e colheita (0,7701 m²), maior número de frutos por planta (1,15), maior produção total de frutos por planta (1,18 kg), e maior conteúdo de sólidos solúveis (15,0%) em relação a 'D. Carlos' (16,39 g, 52,48 g, 0,2550 m², 0,6094 m², 0,78 frutos, 0,848 kg/fruto, e 11,3%, respectivamente). O híbrido D. Carlos, conduzido com duas hastes, apresentou maior conteúdo de sólidos solúveis (12,0%) em relação a uma haste (10,5%), o que não foi observado para 'Bônus nº 2'. A posição de fixação do fruto não influenciou no conteúdo de sólidos solúveis (12,9 a 13,3%), na massa média do fruto (1,050 a 1,090 kg) e no número médio de frutos por planta (1,05 a 1,30). Entretanto, para a produção total por planta, no sistema de condução com uma ou duas hastes, as posições acima do 9º nó até o 15º nó apresentaram maior produção (1,123 a 1,352 kg/planta). 'D. Carlos' mostrou-se mais precoce (81 dias em média) em relação a 'Bônus nº 2' (98 dias em média).

Nutrição e produtividade da cultura do milho em sistemas de culturas e fontes de adubação

A utilização de esterco animal na agricultura, aliada ao cultivo de plantas de cobertura, pode conferir sustentabilidade ao sistema agrícola. Com o objetivo de avaliar o efeito de dois sistemas de culturas e de três fontes de nutrientes, na cultura do milho, conduziu-se um experimento, em Latossolo Vermelho, no município de Marechal Cândido Rondon (PR). O delineamento experimental utilizado foi de blocos casualizados, com quatro repetições, e, os tratamentos, dispostos em esquema fatorial 2 x 3, compostos por dois sistemas de culturas (sucessão trigo/milho e consórcio aveia+ervilhaca+nabo/milho) e três fontes de nutrientes (mineral, orgânica e organomineral). em junho de 2006, implantou-se a cultura do trigo e o consórcio de plantas de cobertura. em outubro de 2006, semeou-se milho sob os dois sistemas. As adubações orgânica e organomineral consistiram na aplicação de dejetos de suínos, unicamente, e combinada com fertilizante mineral, respectivamente. O consórcio de aveia preta, ervilhaca peluda e nabo forrageiro mostrou-se capaz de fornecer a quantidade adequada de biomassa, concretizando sua viabilidade para produção de cobertura vegetal ao solo, durante o inverno. O cultivo de milho em sucessão ao trigo proporcionou a maior absorção de N e K e a maior produtividade. A adubação mineral proporcionou maior absorção de N e maior produtividade de milho, em comparação com as adubações orgânica e organomineral com dejetos de suínos.

Avaliação de porta-enxertos para pepino tipo japonês

A enxertia de pepino híbrido do tipo japonês em aboboreira tem por objetivo principal o manejo de doenças causadas por fungos de solo, consequentemente obter maior produtividade, além de frutos menos cerosos. Neste trabalho estudou-se o comportamento da cultivar Rensei, avaliando-se o desenvolvimento vegetativo das mudas, a produtividade e as características dos frutos das plantas enxertadas em diferentes porta-enxertos, em comparação com as não enxertadas. O trabalho foi realizado sob estufa do tipo túnel alto, com as plantas conduzidas em recipientes plásticos, de julho/96 a julho/97, em Piracicaba - SP. Os tratamentos foram os seguintes: T1 testemunha (planta não-enxertada); T2 enxertia em abóbora Menina Brasileira; T3 enxertia em abóbora híbrida Ikki; T4: enxertia em abóbora-de-moita Novita; T5 enxertia em abóbora híbrida Tetsukabuto; T6 enxertia em abóbora híbrida Kirameki. A porcentagem de pegamento da enxertia só não apresentou valores superiores a 83,3% quando se utilizou abóbora Menina Brasileira. Foram obtidos frutos mais brilhantes e com pouca cerosidade, de interesse comercial, na enxertia em Ikki e Kirameki. Nestes porta-enxertos, seguidos por Tetsukabuto, houve maior produção em peso e número de frutos por planta.

Seleção simultânea de caracteres em progênies de Pinus caribaea Morelet var. bahamensis

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Comparação entre trȩs métodos para estimar lâminas de irrigação

An experiment with four treatments was carried out on the experimental area of ADEI to compare three methods of water use requirement: ETc (T1) - irrigation based on crop evapotranspiration (ETc); Tensiometers (T2 and T3) - irrigations were made through reading of tensiometers installed at 40 cm deep and, Control (T4) - only one irrigation to promote the seedlings emergence. Both Class A pan and soil water depletion methods presented good results when the crop was developed without restraint of water. The Katerji method can be utilized in conditions of water restriction. Irrigation frequency was more important than amount of applied water for higher yield.

Produção de agaricus blazei ss. Heinemann (A. brasiliensis) em função de diferentes camadas de cobertura e substratos de cultivo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Custo de produção e indicadores de rentabilidade da cultura do milho safrinha

The objective of this study was to evaluate the production cost and profitability of the second season corn crop in the Medio Paranapanema region, São Paulo State Brazil, under two technological levels (middle and high technology), crop 2008/2009, and compare the results with the 2006/2007 agricultural year. Effective and total operational cost as well as five profitability indicators were used. It was concluded that the high technology production cost for corn crop (direct seedling, sowing during the recommended period, use of simple hybrid seed, application of side-dressing fertilization, and treatment of seeds with different insecticides) was superior to the middle technology production cost (direct seedling, sowing after the recommended time, use of double hybrid seed, and no side-dressing fertilization). However, the average cost was inferior (US$ 8.5), due to a higher yield (4 t). The high technology corn crop was profitable (gross income and profitability index of 14% and 12%, respectively). For the middle technology crop, profitability indexes pointed out that the cropping system needs to be reevaluated by technicians and research institutions, regarding the adequate technical recommendations. Profitability indexes decreased considerably in both cropping systems. It was verified that, in relation to the 2006/2007 harvest period, the total operational cost increased for both technologies, mainly because of the increase of supplies prices.

Manejo de plantas daninhas e sua relação com a produtividade e potencial fisiológico de sementes de feijoeiro

Common bean is an important crop in Brazil primarily because of its nutritional characteristics. Some agronomic practices, such as weed management, are fundamental to cultivation, as a means of obtaining a high crop yield. However, some studies have shown that weed management may alter the function of the cultivar cycle. Thus, this study aimed at determining the optimal phenological stage in early-maturing common bean cultivars to perform the weed control without providing reductions in yield and seed quality. The experimental design was randomized blocks with 20 treatments and four replications, in a 2×2×5 (cultivars × types of weed control × periods of weed control) factorial scheme. The periods of weed control for both cultivars (Carioca Precoce and IPR-Colibri) consisted of full cycle weeded (control), weed control at the V4-3 stage (first three nodes on the main stem with trifoliate leaves), at the R5 stage (beginning of bloom) and at the R8 stage (appearance of pods) and full cycle unweeded (no weed control). The types of weed control used were chemical (fluazifop-p-butyl + fomesafen) and mechanical (hoe). The Carioca Precoce cultivar demonstrated higher agronomic performance and yield than the IPR-Colibri cultivar, although the IPR-Colibri seeds had a higher vigor. The type of weed control (chemical or mechanical) did not affect the agronomic characteristics, yield and seed physiological potential of the cultivars. The ideal period for weed control in early-maturing common bean cultivars to obtain a higher yield and seed physiological potential was observed at the V4-3 phenological stage.

Extração e exportação de nutrientes em cultivares de feijoeiro, sob níveis de adubação: I - Macronutrientes

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Extração e exportação de nutrientes em cultivares de feijoeiro, sob níveis de adubação: II - Micronutrientes

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)