20,990 research outputs found
Competição de variedades de macaxeira (Manihot esculenta, L.) para agricultura familiar, no Município de Salvaterra, Marajó - Pa.
Edição dos Anais do XIII Congresso Brasileiro de Mandioca; VII Workshop sobre Tecnologia em Agroindústrias de Tuberosas Tropicais, Botucatu, 2009. Disponível também on-line
Resposta da mandioca (Manihot esculenta, L.), variedade Poti, à doses de N, P, K no Município de Salvaterra, Marajó - Pará.
Edição dos Anais do XIII Congresso Brasileiro de Mandioca; VII Workshop sobre Tecnologia em Agroindústrias de Tuberosas Tropicais, Botucatu, 2009. Disponível também on-line
Competição de variedades de mandioca (Manihot esculenta, L.) para agricultura familiar, no Município de Salvaterra, Marajó - Pará.
Edição dos Anais do XIII Congresso Brasileiro de Mandioca; VII Workshop sobre Tecnologia em Agroindústrias de Tuberosas Tropicais, Botucatu, 2009
Relação benefício/custo da produção de variedades de macaxeira para agricultura familiar, em Salvaterra, Marajó, Pará.
O objetivo deste trabalho foi determinar a relação benefício/custo da produção de cinco variedades (Paraíba, Mineirinha, Amarelinha, Manteiguinha e Parmada) de macaxeira ou mandioca de mesa, cultivadas pela agricultura familiar da região, em latossolo amarelo distrófico, textura arenosa
Avaliação sócio-econômica do cultivo do feijão-caupi [Vigna unguiculata L. (Walp)], cv. Manteiguinha pela agricultura familiar no município de Salvaterra, Marajó, Pará.
Este trabalho teve como objetivo definir a dose mais econômica da fórmula comercial (18:18:18) como fonte de N, P, K, para a cultura do feijão-caupi, cv. manteiguinha, no município de Salvaterra
Galaxy disks do not need to survive in the L-CDM paradigm: the galaxy merger rate out to z~1.5 from morpho-kinematic data
About two-thirds of present-day, large galaxies are spirals such as the Milky
Way or Andromeda, but the way their thin rotating disks formed remains
uncertain. Observations have revealed that half of their progenitors, six
billion years ago, had peculiar morphologies and/or kinematics, which exclude
them from the Hubble sequence. Major mergers, i.e., fusions between galaxies of
similar mass, are found to be the likeliest driver for such strong
peculiarities. However, thin disks are fragile and easily destroyed by such
violent collisions, which creates a critical tension between the observed
fraction of thin disks and their survival within the L-CDM paradigm. Here we
show that the observed high occurrence of mergers amongst their progenitors is
only apparent and is resolved when using morpho-kinematic observations which
are sensitive to all the phases of the merging process. This provides an
original way of narrowing down observational estimates of the galaxy merger
rate and leads to a perfect match with predictions by state-of-the-art L-CDM
semi-empirical models with no particular fine-tuning needed. These results
imply that half of local thin disks do not survive but are actually rebuilt
after a gas-rich major merger occurring in the past nine billion years, i.e.,
two-thirds of the lifetime of the Universe. This emphasizes the need to study
how thin disks can form in halos with a more active merger history than
previously considered, and to investigate what is the origin of the gas
reservoir from which local disks would reform.Comment: 19 pages, 7 figures, 2 tables. Accepted in ApJ. V2 to match proof
corrections and added reference
Aspectos econômicos da adubação N, P, K para o feijão-caupi [Vigna unguiculata, L. (Walp)], cv. pretinho, cultivado pela agricultura familiar, no município de Salvaterra, Marajó-Pará.
O objetivo deste trabalho foi definir o nível mais econômico da fórmula coemrcial (18:18:18), como fonte de N, P e K para a cultura do feijão-caupi cv. pretinho, no município de Salvaterra, Marajó, PA
Fast Community Identification by Hierarchical Growth
A new method for community identification is proposed which is founded on the
analysis of successive neighborhoods, reached through hierarchical growth from
a starting vertex, and on the definition of communities as a subgraph whose
number of inner connections is larger than outer connections. In order to
determine the precision and speed of the method, it is compared with one of the
most popular community identification approaches, namely Girvan and Newman's
algorithm. Although the hierarchical growth method is not as precise as Girvan
and Newman's method, it is potentially faster than most community finding
algorithms.Comment: 6 pages, 5 figure
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