Spacings
Mostrando 1-12 de 147 artigos, teses e dissertações.
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1. INFLUENCE OF SEED TUBE CURVATURE ON SEED LONGITUDINAL DISTRIBUTION
ABSTRACT Studies on the longitudinal distribution of seeds in the sowing row seek to improve crop homogeneity, thus generating high productivity. In this context, seed tubes must be analyzed for their angular curvature. Thus, this study aimed to evaluate the influence of the seed tube curvature on the longitudinal distribution of corn and soybean seeds at di
Eng. Agríc.. Publicado em: 2020-12
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2. ASYMMETRIC WETTED SECTOR ANGLE IN WATER DISTRIBUTION OF TRAVELING GUN IRRIGATION SYSTEMS
ABSTRACT This work aimed to simulate the water distribution of traveler gun irrigation, working with asymmetrical wetted angles and in windy conditions. In the simulations of a sprinkler with uniform radial profile, the following were considered: i) wetted angles between 180 and 330°; ii) wetted angle asymmetries from 0 to 90°; iii) wind speeds from 0 to 4
Eng. Agríc.. Publicado em: 2020-08
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3. SEED METERING MECHANISMS AND TRACTOR-SEEDER FORWARD SPEED ON CORN AGRONOMIC COMPONENTS
ABSTRACT Seed metering system and tractor-seeder forward speed are factors that affect sowing. Therefore, this study aimed to evaluate sowing and agronomic components of corn as a function of seed metering mechanism and tractor-seeder forward speed, in addition to evaluating the yield data obtained from a harvester with a yield monitor. The soil of the area
Eng. Agríc.. Publicado em: 2020-02
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4. Productivity, quality of fruits and architecture of Jalapeño pepper at different planting densities
RESUMO Mecanizar a colheita de pimenta Jalapeño exige adequação do sistema de produção. Espaçamentos entre plantas na linha (10 a 40 cm; 60 cm fixo entre linhas) foram avaliados quanto à arquitetura da planta, produtividade e qualidade de frutos da cultivar BRS Sarakura, durante três anos no delineamento blocos ao acaso, com cinco repetições. A pro
Hortic. Bras.. Publicado em: 07/11/2019
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5. Yield and water use efficiency of cactus pear under arrangements, spacings and fertilizations
RESUMO A palma forrageira é adaptada às condições semiáridas. Neste trabalho, objetivou-se avaliar em três ciclos de produção, a eficiência do uso da água e as produtividades de massa verde e matéria seca, da cultivar Gigante sob diferentes doses e fontes de adubação, espaçamento e arranjos de plantas. Setenta e dois tratamentos, envolvendo doi
Rev. bras. eng. agríc. ambient.. Publicado em: 01/07/2019
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6. The effect of planting density on ‘BRS Rubimel’ peach trained as a “Y-shaped” system
Resumo O adensamento de pomares tem se tornado uma alternativa viável na busca de maior aproveitamento da área e rentabilidade. Nesse sentido, o espaçamento e o sistema de condução a ser utilizado no plantio de pessegueiro são extremamente importantes para facilitar o manejo do pomar e sobretudo, maximizar a produtividade do pomar. Com base nisso, bus
Rev. Bras. Frutic.. Publicado em: 25/04/2019
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7. Growth of Eremanthus erythropappus (DC.) MacLeish in Different Planting Spacings
ABSTRACT This study aimed to evaluate the growth of Eremanthus erythropappus (DC.) MacLeish submitted to different planting spacing and growth modelling based on the diameter and crown area projection, as well as to identify the best management strategy to be applied to control the competition, period and intensity of thinning. The evaluated planting spacin
Floresta Ambient.. Publicado em: 04/04/2019
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8. Effect Of Planting Spacing In Production And Permeability Of Heartwood And Sapwood Of Eucalyptus Wood
RESUMO O objetivo deste trabalho foi avaliar a influência de diferentes áreas úteis proporcionadas pelos espaçamentos de plantio (3 × 1, 3 × 2, 3 × 3, 3 × 4 m) na produção e na permeabilidade do cerne e do alburno da madeira de clones de Eucalyptus grandis e Eucalyptus grandis × Eucalyptus urophylla, aos 4 anos de idade. Independente do clone, n�
Floresta Ambient.. Publicado em: 14/03/2019
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9. Relationship Between Aluminum-Rich/Intermetallic Phases and Microhardness of a Horizontally Solidified AlSiMgFe Alloy
An experimental study with an A356-AlSiMgFe alloy was developed to evaluate the microhardness performance in the microstructure resulting of an unsteady-state horizontal solidification process. The Al-7wt%Si-0.3wt%Mg-0.15wt%Fe alloy was elaborated and directionally solidified in a water-cooled horizontal solidification device. In order to experimentally dete
Mat. Res.. Publicado em: 23/11/2018
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10. Transient Unidirectional Solidification, Microstructure and Intermetallics in Sn-Ni Alloys
The present research work examines the microstructural arrangements formed during the transient solidification of eutectic Sn-0.2wt.%Ni and hypereutectic Sn-0.5wt.%Ni alloys. Also, it examines their respective correlations with solidification thermal parameters: eutectic growth rate (VE) and eutectic cooling rate (ṪE); length scales of matrix and eutectic
Mat. Res.. Publicado em: 12/04/2018
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11. Microstructural evolution and mechanical properties of Sn-Bi-Cu ternary eutectic alloy produced by directional solidification
Sn-36Bi-22Cu (wt.%) ternary eutectic alloy was prepared using vacuum melting furnace and casting furnace. The samples were directionally solidified upwards solidification rate varying from 8.3 to 166 µm/s and at a constant temperature gradient (4.2 K/mm) in a Bridgman-type directional solidification furnace. The composition analysis of the phases and the in
Mat. Res.. Publicado em: 05/02/2018
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12. Glass Microbeads in Analog Models of Thrust Wedges
ABSTRACT Glass microbeads are frequently used in analog physical modeling to simulate weak detachment zones but have been neglected in models of thrust wedges. Microbeads differ from quartz sand in grain shape and in low angle of internal friction. In this study, we compared the structural characteristics of microbeads and sand wedges. To obtain a better pic
An. Acad. Bras. Ciênc.. Publicado em: 2017-03