Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Valdinar Ferreira-Melo"'
Autor:
Heloisa Kelly Santos Moreira, Sandra Cátia Pereira Uchôa, Victor Hugo Alvarez Venegas, Carlos Henrique de Lima Matos, Valdinar Ferreira Melo, José Maria Arcanjo Alves, Armando José Silva
Publikováno v:
Agro@mbiente On-line, Vol 18, Iss 00 (2024)
The study of sulfur (S) forms in the soil is relevant, and its availability depends on pH. The aim was to investigate how pH affects the balance between labile and non-labile sulfur reserves. The randomized block design with four replications was use
Externí odkaz:
https://doaj.org/article/0a628027f30349979dbaa2e62b8152b0
Autor:
João Luiz Lopes Monteiro Neto, José de Anchieta Alves de Albuquerque, Valdinar Ferreira Melo, Wellington Farias Araújo, Ricardo Manuel Bardales-Lozano, Luiz Fernandes Silva Dionisio, Richard Alcides Molina Alvarez, Glauber Ferreira Barreto, Fleorliene Félix Liarte, Carlos Abanto-Rodríguez
Publikováno v:
Semina: Ciências Agrárias, Vol 44, Iss 2 (2024)
Determinar um sistema eficiente de produção de mudas, em estufas agrícolas e sobre malhas fotoconversoras, considerando ainda a qualidade de substratos disponíveis, é essencial à obtenção de cultivos produtivos e economicamente viáveis. Ness
Externí odkaz:
https://doaj.org/article/22d1775c827440df9acf981f6d0ae3bb
Autor:
Paulo Roberto Ribeiro Rocha, Sonicley da Silva Maia, Valdinar Ferreira Melo, Sandra Cátia Pereira Uchôa, Karine Dias Batista, Luiza Amorim Cavalcante
Publikováno v:
Acta Scientiarum: Agronomy, Vol 46, Iss 1 (2023)
Conservation practices such as no-tillage are necessary to maintain, and/or improve agricultural soil quality. However, straw formation and maintenance in tropical regions is a limiting factor to adopting this system. In this sense, this research aim
Externí odkaz:
https://doaj.org/article/8ed704164b4d4cebaa5da196f4bdaeee
Autor:
Carlos Henrique Lima de Matos, Valdinar Ferreira Melo, Sandra Cátia Pereira Uchôa, Raimundo de Almeida Pereira, Pedro Paulo Ramos Ribeiro Nascimento
Publikováno v:
Revista Ciência Agronômica, Vol 54 (2023)
ABSTRACT Given the heterogeneity of soils in Roraima state, Brazil, and the need for a phosphorus (P) extraction protocol, this study aimed to assess the efficiency of the Mehlich-1, Mehlich-3, Bray-1 extractants and anion exchange resin (AER) in det
Externí odkaz:
https://doaj.org/article/b43da6d3ad3642ad82be5b625d606619
Autor:
Armando José da Silva, Robison Alves da Silva, Valdinar Ferreira Melo, Mauricio Lourenzoni Augusti, Paulo Roberto Ribeiro Rocha, José Maria Arcanjo Alves
Publikováno v:
Agro@mbiente On-line, Vol 16 (2022)
Brazilian wheat production is concentrated in the South region and does not fully meet the domestic demand for wheat. The Brazilian Cerrado has become an area of great potential for wheat cultivation due to investments in genetic improvement research
Externí odkaz:
https://doaj.org/article/2a15bc92c4524199bd70e5d62114a63f
Autor:
Williamar Rodrigues Silva, Dr., Pedro Aurélio Costa Lima Pequeno, Dr., Hugo Leonardo Sousa Farias, Dr., Valdinar Ferreira Melo, Dr., Carlos Darwin Angulo Villacorta, MSc., Lidiany Camila Silva Carvalho, Dr., Ricardo Oliveira Perdiz, Dr., Arthur Camurça Citó, Reinaldo Imbrozio Barbosa, Dr.
Publikováno v:
Boletim do Museu Paraense Emílio Goeldi. Ciências Naturais, Vol 16, Iss 2, Pp 229-244 (2021)
Estrutura de comunidades de árvores em florestas tropicais depende de filtros ambientais e interações abióticas, como competição e facilitação. Muitas florestas de ecótono no norte da Amazônia são intrigantemente povoadas por assembleias d
Externí odkaz:
https://doaj.org/article/becd12e4db444619aa3ff8d8c42a64e4
Autor:
Sandra Catia Pereira Uchôa, Fernando Felipe Ferreyra Hernández, Valdinar Ferreira Melo, Deyse Cristina Oliveira da Silva, Armando José da Silva, Laís de Brito Carvalho
Publikováno v:
Revista Ciência Agronômica, Vol 52, Iss 4 (2021)
ABSTRACT Despite the relevance of sulphur (S) to plant development, studies in Brazil on its availability in the soil are restricted to a few crops and regions. The aim of this study was to compare extractants for assessing the availability of S, and
Externí odkaz:
https://doaj.org/article/68cce579a99a44c09011884dc7454c99
Autor:
Elpídio Fernandes-Filho, Marcio Rocha Francelino, Astrid Elena Pérez López, Valdinar Ferreira Melo
Publikováno v:
Revista Facultad Nacional de Agronomía Medellín. 75:10037-10051
Los parámetros hidrológicos y morfométricos de una cuenca constituyen estimaciones que deben realizarse sobre un mapa con suficiente información. La recopilación de esta in situ se ha visto limitada por problemas de orden público. Entre los ín
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea8e827fafc7a4458b0729815b869542
https://doi.org/10.15446/rfnam.v75n3.100663
https://doi.org/10.15446/rfnam.v75n3.100663
Autor:
Carlos Henrique de Lima Matos, Valdinar Ferreira Melo, Sandra Cátia Pereira Uchôa, Pedro Paulo Ramos Ribeiro Nascimento, Raimundo Almeida Pereira
Publikováno v:
Semina: Ciências Agrárias, Vol 38, Iss 5, Pp 2909-2920 (2017)
Estudos sobre capacidade máxima de adsorção de fósforo (CMAP) em solos de Roraima e atributos que interferem na magnitude dessa característica são relevantes e motivaram esse trabalho. Nesse contexto, amostras da camada superficial (0-0,20 m) d
Externí odkaz:
https://doaj.org/article/86bcf24543624f5c8e01422a3edeba7b
Autor:
Valdinar Ferreira Melo, Danielly Teixeira da Silva, Ariane Evald, Paulo Roberto Ribeiro Rocha
Publikováno v:
Agro@mbiente On-line, Vol 11, Iss 2, Pp 101-110 (2017)
Environmental concern has led the agricultural community to search soil management systems aimed at maintaining or improving the quality of agricultural soils. The objective of this study was to evaluate soil quality (QS), by means of chemical and mi
Externí odkaz:
https://doaj.org/article/2d84e971b8b34171a2a5d73b0fc8d123