Zobrazeno 1 - 10
of 111
pro vyhledávání: '"ELVIO GIASSON"'
Autor:
Fabrício Fernandes Coelho, Elvio Giasson, Alcinei Ribeiro Campos, Tales Tiecher, José Janderson Ferreira Costa, João Augusto Coblinski
Publikováno v:
Scientia Agricola, Vol 78, Iss 5 (2020)
ABSTRACT: In Brazil several digital soil class mapping studies were carried out from 2006 onwards to maximize the use of existing maps and information and to provide estimates for wider areas. However, there is no consensus on which methods have prod
Externí odkaz:
https://doaj.org/article/b8eed27dbd924208abed7278692fbb6f
Publikováno v:
Anuário do Instituto de Geociências, Vol 41, Iss 2, Pp 598-605 (2018)
At present, the lands fragmentation in little parts for family interests is done by the try and mistakes method, in which, the technician try to delimit the areas in similar dimensions and proportions for each interested. They do it based in theier
Externí odkaz:
https://doaj.org/article/039fbb272d324b34b2765bdcc9123a50
Autor:
José Janderson Ferreira Costa, Elvio Giasson, Elisângela Benedet da Silva, Alcinei Ribeiro Campos, Israel Rosa Machado, Benito Roberto Bonfatti, Ivan Luiz Zilli Bacic
Publikováno v:
Pesquisa Agropecuária Brasileira, Vol 54 (2019)
Abstract: The objective of this work was to disaggregate the polygons of physiographic map units in order to individualize the soil classes in each one, representing them as simple soil map units and generating a more detailed soil map than the origi
Externí odkaz:
https://doaj.org/article/3839a11cf4894ddaa12d9f1da3b902f2
Autor:
Alcinei Ribeiro Campos, Elvio Giasson, José Janderson Ferreira Costa, Israel Rosa Machado, Elisângela Benedet da Silva, Benito Roberto Bonfatti
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 42, Iss 0 (2019)
ABSTRACT A large number of predictor variables can be used in digital soil mapping; however, the presence of irrelevant covariables may compromise the prediction of soil types. Thus, algorithms can be applied to select the most relevant predictors. T
Externí odkaz:
https://doaj.org/article/b193966ec3b34f488b8a5a70fa93d7e1
Publikováno v:
Pesquisa Agropecuária Brasileira, Vol 51, Iss 9, Pp 1317-1325 (2016)
Resumo O objetivo deste trabalho foi realizar a expansão de mapas pedológicos pela extrapolação de mapas preexistentes para áreas fisiograficamente semelhantes. Foram utilizados mapas de solos, em escala 1:50.000, das bacias hidrográficas dos r
Externí odkaz:
https://doaj.org/article/e318ec0ada374d1f94a1bce351c89c51
Autor:
Israel Rosa Machado, Elvio Giasson, Alcinei Ribeiro Campos, José Janderson Ferreira Costa, Elisângela Benedet da Silva, Benito Roberto Bonfatti
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 42, Iss 0 (2018)
ABSTRACT Soil surveys often contain multi-component map units comprising two or more soil classes, whose spatial distribution within the map unit is not represented. Digital Soil Mapping tools supported by information from soil surveys make it possib
Externí odkaz:
https://doaj.org/article/a931ba57531440588bd6b4056c37cf16
Autor:
Luís de França da Silva Neto, Alberto Vasconcellos Inda, Paulo César Do Nascimento, Elvio Giasson, Catiline Schmitt, Nilton Curi
Publikováno v:
Ciência e Agrotecnologia, Vol 39, Iss 5, Pp 423-434 (2015)
ABSTRACTIn the Porto Alegre metropolitan region (PAMR) there are a significant proportion of floodplain soils, mainly Planosols and Gleysols, in relation to upland soils. This study aimed to evaluate the morphological, chemical and physical character
Externí odkaz:
https://doaj.org/article/4b9da0f229834d938b7b4f78ecaf9e5a
Publikováno v:
Ciência Rural, Vol 45, Iss 9, Pp 1592-1598 (2015)
A critical issue in digital soil mapping (DSM) is the selection of data sampling method for model training. One emerging approach applies instance selection to reduce the size of the dataset by drawing only relevant samples in order to obtain a repre
Externí odkaz:
https://doaj.org/article/02b030f0a52f4962bfe72cc5d221ea08
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 39, Iss 4, Pp 950-959 (2015)
A produção de mapas pedológicos por meio de técnicas do mapeamento digital de solos (MDS) pode ser dificultada pela falta de mapas pedológicos tradicionais de referência. Nessas situações, o conhecimento tácito do mapeador pode ser usado par
Externí odkaz:
https://doaj.org/article/69835e56f8db4cbfb758248a263c1971
Publikováno v:
Revista Brasileira de Ciência do Solo, Vol 39, Iss 4, Pp 960-967 (2015)
Para estudar técnicas de amostragem, úteis ao mapeamento digital de solos (MDS), objetivou-se avaliar o efeito da variação da densidade de pontos amostrais com base em dados de áreas já mapeadas por métodos tradicionais na acurácia dos modelo
Externí odkaz:
https://doaj.org/article/ed73c51cd5e64518b651aa10798c1e92