Biofertilizante bovino, cobertura morta e revestimento lateral dos sulcos na produção de pimentão

The adoption of management practices that reduce water losses is essential to conserve moisture and improve soil temperature, especially in arid and semiarid environments of the Brazilian Northeast, characterized by high evapotranspiration and the adoption of irrigation with saline water, which harms growth and yield of commercial crops. Given these factories, an experiment was conducted in Nova Floresta, Paraiba, from August 2010 to February 2011 in Oxisoil, in order to evaluate the production of bell pepper and soil moisture in grooves with side trim, and application of biofertilizer and mulch cattle. The experimental design was randomized blocks with four replications using a factorial 2 x 2 x 2 for the ground beef with and without biofertilizer, with and without residues of sisal fiber (Agave sisalana), with and without the side facing the grooves, to reduce lateral water losses by infiltration of water with polyethylene plastic film. From the results, the lining of the lateral grooves provided higher values of soil moisture, number of fruits, fruit mass, plant production and productivity, bell pepper plants. It was also found that the combination of biofertilizer and mulch the ground beef remained wetter in the first 15 cm depth.

Comportamento da cana-de-açúcar em duas safras e atributos físicos do solo, sob diferentes tipos de preparo

The tillage comprises on average 25% of the cost of deploying a reed, so this cost reduction measures are desirable since they do not compromise the quality of the operation and longevity of sugarcane. The objective was to evaluate the effect of different tillage systems in Acrustox, correlating soil physical properties and characteristics of sugarcane agroindustrial plant cane and ratoon cane. We used five types of soil tillage, over experimental design in blocks with five replications. The particle size was measured every 0.1 m to 0.4 m depth, through deformed soil samples collected at the end of the first growth cycle of the culture. For other soil physical properties: bulk density, total porosity and water content, assessments were performed at the end of each cycle, collecting soil samples in layers of 0-0.20 to 0.21-0.40 m, in addition to performing the penetration resistance, using a penetrometer impact. The response of sugarcane depending on the types of tillage was determined from the evaluation of productivity per hectare of stem (TCH), sugar (TPH), the values of pol % cane (AP), sugar total recoverable (ATR) and fiber samples collected at harvest stalk of sugarcane plant and ratoon cane. In the tillage studied, there was a change of the physical attributes of the soil, causing reduced productivity in 2009/2010 crop, compared with the 2008/2009 season. In tillage system of furrowing direct lowest result was observed for TCH, especially in 2009/2010 crop, when the difference with conventional tillage was 20.53 Mg ha(-1).

Resistência mecânica à penetração em latossolo vermelho após sucessivos cortes mecanizas de cana-de-açúcar

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Avaliação in vitro da resistência estrutural em dentes fragilizados utilizando reforços intra-radiculares

Pós-graduação em Odontologia Restauradora - ICT

Gênese de solos coesos do leste maranhense: relação solo-paisagem

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

Crescimento radicular de espécies utilizadas como cobertura decorrente da compactação do solo

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

Desenvolvimento de um protetor lateral em alumínio

In view of the need to develop a device for security and lateral protection, due to the Resolution 323/09 of CONTRAN, which requires the use of such equipment for most trucks and tow trucks, the objective of this work is to develop a project for an aluminum lateral protection device, according to the ABNT NBR 14.148 regulation, that, among many specifications, stipulates that the equipment must support a load of 5 kN and suffer a maximum deflection of 30mm, but does not say what material it should be made of. The reason for choosing aluminum is because of its low density, so as not to significantly increase the curb weight of the truck, which, consequently, reduces CO2 emissions and maintenance expenses. Additionally, this material presents a good resistance/weight ratio, high resistance to corrosion, excellent surface finish and it's fully recyclable; reason why it has been gaining the attention of many industry segments. For the realization of the project, profiles were chosen to make the assembly of the set, and then a finite elements analysis was performed in the HyperWorks software, to verify if the designed device would support the loads stipulated by the regulation. One details to note is that these simulation programs could show inaccuracies, because of the size and shape of the elements that compose the mesh, and for many other reasons, so it is necessary that, even with the results coming back satisfactory, actual physical tests are conducted to validate the proper functioning of the equipment, which was not done for this study

Estudo do efeito da classe de furação na resistência à fadiga em junta alumínio – fibra de carbono

This work performs a comparative study of fatigue life of riveted lap joints involving classes of drilling which adjustment is made with interference or clearance. For this study, representative specimens of this joints were manufactured with four rivets distributed in two rows. In this context, are presented the test matrix, the methodology employed in performing of the tests, the used mathematical modeling, and that methods that are the basis for the latter are described through the theoretical foundation. Next, are present the results obtained in fatigue tests and images of the region of failure of the specimens. Finally, are present some comments and conclusions related to the results obtained

Avaliação de atributos do solo e vegetação em sistema agroecológico

A importância da agroecologia se dá no sentido de fornecer e ser, base e estrutura de conhecimentos mesclados, incorporando saberes tradicionais aos saberes técnicos científicos atuais, sem excluir ou rejeitar, mas usando ambos a favor da transição para uma pratica agrícola mais sustentável e coerente com os fluxos e com a complexidade natural de um ecossistema, o que não se percebe nas práticas agrícolas modernas e convencionais. Inúmeros estudos constataram que para uma boa efetividade de sistemas agroecológicos é necessário recuperar e manter o equilíbrio biológico do solo, pois isso influenciará em suas características físicas e químicas. O objetivo desse trabalho foi de caracterizar o solo sob Sistema Agroflorestal (SAF) e uma Pastagem, no município de Rio Claro (SP), para a obtenção de atributos do solo, morfológicos, físicos e químicos e também descrever a diversidade do extrato arbóreo presente na área, incluindo as espécies agrícolas, e levantar o histórico de implantação do sistema, de modo a criar e dar início a formação de um banco de dados científicos para o Grupo de Extensão Gira-Sol. Foram escolhidos dois perfis nas seguintes situações: sistema agroflorestal e uma Pastagem para descrição morfológica do solo. Em cada área foi efetuada a coleta de amostras deformadas e indeformadas e caracterizados os atributos granulometria, analises química, densidade do solo, porosidade do solo e resistência à penetração. Para a descrição morfológica dos perfis foi utilizado os procedimentos descritos por Lemos e Santos (2002), para os atributos químicos e de fertilidade do solo, Camargo et al. (1986) e EMBRAPA (1997), para granulometria, densidade e porosidade do solo e argila dispersa em água. A descrição da vegetação foi feita com auxilio de guias de identificação e por meio de parcelas, onde as espécies foram tabeladas e plotadas em um mapa da área para localização das mesmas, e.

Simulação geoestatística e classificação numérica para o delineamento de unidade de mapeamento de atributos e erosão do solo

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Ensaios laboratoriais para a determinação da resistência de conexão entre geogrelhas de PVA e blocos segmentais

During the retaining wall project in soil reinforced with geogrids and face milling system for segmental blocks is essential to determine the maximum connection resistance between the block and the geogrid. Thus, the aim of this study was to analyze the connection resistance based on ASTM D- 6638-01 between the segmental block model MW of Muros Terrae® company with the geogrids model Fortrac® M 35 / 20x20, Fortrac® M 55 / 30x20, Fortrac® M 80 / 30x20 and Fortrac® M 110 / 30x20 of HUESKER Synthetic GmbH using gravel 1 as a filling material. As a result, the resistance curves were obtained for the four models of geogrids and was described how it fracture. An additional investigation was the average gain connection resistance percentage when it is applied to geogrid a second layer instead of a single layer. The average percentage gains in the connection resistance to the geogrids model Fortrac® M 35 / 20x20, Fortrac® M 55 / 30x20, Fortrac® M 80 / 30x20 and Fortrac® M 110 / 30x20 were, respectively, 63.20 %, 63, 47%, 62.23 % and 51.34 %. Finally, we made a comparative analysis of the results of this study with those obtained by Guimarães (2006), Urashima et. al (2008) and Almeida and Toma (2011) to evaluate which combinations offered higher connection resistance

Efeito do teor de água na avaliação da compactação do solo causada pelo tráfego agrícola e seu reflexo nos atributos físicos do solo

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Calagem superficial e aplicação de gesso em sistema plantio direto de longa duração: efeitos no solo e na sucessão milho/crambe/feijão-caupi

Pós-graduação em Agronomia (Agricultura) - FCA

Atributos físicos de latossolos cultivados com cana-de-açúcar sob sistemas de usos do solo

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Aplicação de efluente de tratamento de esgoto, via aspersão, no solo e em Brachiaria

Pós-graduação em Agronomia (Ciência do Solo) - FCAV