Alterações no solo e no desempenho produtivo do coqueiro em um sistema manejado com cobertura de bagaço de coco verde.

Neste estudo, objetivou-se avaliar alterações sofridas pelo solo e cultivo de coco irrigado, manejado com ou sem a presença de bagaço de coco como cobertura, no Submédio São Francisco

Diversidade de Cucumber mosaic virus em hortaliças no estado do Pará.

Resumos do Congresso Paulista de Fitopatologia, 40., 2017, Campinas

New insights on the ultramafic intrusions surrounding the Kunene Anorthosite Complex (SW Angola) from gravity, magnetic and radiometric data [Abstract]

ABSTRACT: The Kunene Anorthosite Complex (KAC), located in SW Angola, is one of the largest anorthosite structures in the world. Dating from the Mesoproterozoic, its installation process is still not clear. Several mafic and ultramafic outcrops can be found surrounding the KAC. Once considered related with its emplacement, the study of these bodies may help us understand the history of this unique geological feature. While geochronological data show that they are synchronous, or possibly a bit younger, than the embedding granites and migmatites of Paleoproterozoic age, the question arises of whether they are intrusions installed in the host rock or if they are instead recycled remains of older Arch crust. The development of these outcrops in depth provides relevant clues regarding the origin of these bodies and their relationship with the Eburnean (~1.93-2.04 Ga) and Epupa-Namibe (~1.83-1.74 Ga) events. One of these mafic outcrops, designated the Hamutenha outcrop (Huíla Province) exhibits an elongated shape and a NW-SE orientation and is characterized by an internal zonation. Generally, the innermost part is composed of ultramafic rocks of (mostly harzburgites and dunites), with diorites outcropping in its NW and SE borders. The Hamutenha outcrop was previously identified for potentially bearing Cr, Ni and PGE mineralization.N/

Produtividade de grãos de linhagens-elite de feijão preto nos anos de 2018 e 2019, no norte de Minas Gerais.

Para validar o desempenho agronômico de feijoeiros que substituam com vantagem as cultivares pré-existentes, é imprescindível e obrigatório a realização de ensaios de valor de cultivo e uso (VCU) em diferentes regiões do país, condições edafoclimáticas e safras de plantio. Nesse sentido, objetivou-se com este trabalho avaliar a produtividade de grãos de linhagens-elite de feijão-comum do grupo comercial preto, em diferentes épocas de cultivo no norte de Minas Gerais.Evento online

Prime Focus Spectrograph - Subaru's future -

The Prime Focus Spectrograph (PFS) of the Subaru Measurement of Images and Redshifts (SuMIRe) project has been endorsed by Japanese community as one of the main future instruments of the Subaru 8.2-meter telescope at Mauna Kea, Hawaii. This optical/near-infrared multi-fiber spectrograph targets cosmology with galaxy surveys, Galactic archaeology, and studies of galaxy/AGN evolution. Taking advantage of Subaru's wide field of view, which is further extended with the recently completed Wide Field Corrector, PFS will enable us to carry out multi-fiber spectroscopy of 2400 targets within 1.3 degree diameter. A microlens is attached at each fiber entrance for F-ratio transformation into a larger one so that difficulties of spectrograph design are eased. Fibers are accurately placed onto target positions by positioners, each of which consists of two stages of piezo-electric rotary motors, through iterations by using back-illuminated fiber position measurements with a wide-field metrology camera. Fibers then carry light to a set of four identical fast-Schmidt spectrographs with three color arms each: the wavelength ranges from 0.38 {\mu}m to 1.3 {\mu}m will be simultaneously observed with an average resolving power of 3000. Before and during the era of extremely large telescopes, PFS will provide the unique capability of obtaining spectra of 2400 cosmological/astrophysical targets simultaneously with an 8-10 meter class telescope. The PFS collaboration, led by IPMU, consists of USP/LNA in Brazil, Caltech/JPL, Princeton, & JHU in USA, LAM in France, ASIAA in Taiwan, and NAOJ/Subaru.Comment: 13 pages, 11 figures, submitted to "Ground-based and Airborne Instrumentation for Astronomy IV, Ian S. McLean, Suzanne K. Ramsay, Hideki Takami, Editors, Proc. SPIE 8446 (2012)

Natural variation of selenium in Brazil nuts and soils from the Amazon region.

In this study, we aimed to investigate whether the natural variation of Se in Brazil nuts from different Amazon regions can be associated with the variability of total Se concentration in the soil as well as with other soil parameters that control Se availability, such as soil pH