Results 11 to 20 of about 18,346 (209)

Opal phytolith extraction in oxisols [PDF]

Quaternary International, 2013
The analysis of phytolith assemblages is an important method in studies that uses the soil as an environmental record in order to reconstruct the paleoclimatic conditions. Despite being underused in soil science, this technique is used complementary to the analysis of pollen and other microfossils, as well as to evaluate silicon reserves in the soil ...
Calegari, Marcia R., Madella, Marco, Vidal Torrado, Pablo, Otero, Xosé Luis, Macias, Felipe, Osterrieth, M.   +5 more
openaire   +2 more sources

Relationships between soil class and nutritional status of coffee plantations Relacionamento entre classes de solo e o estado nutricional de lavouras cafeeiras

Revista Brasileira de Ciência do Solo, 2005
Farm planning requires an assessment of the soil class. Research suggest that the Diagnosis and Recommendation Integrated System (DRIS) has the capacity to evaluate the nutritional status of coffee plantations, regardless of environmental conditions ...
Paulo Guilherme Salvador Wadt
doaj   +1 more source

Solubilización de fosfatos por bacterias del género Burkholderia aisladas de oxisoles de la altillanura colombiana

Ciencia y Tecnología Agropecuaria, 2021
Los oxisoles de la altillanura en Colombia contienen hasta 400 mg/kg de fósforo. Sin embargo, la fracción disponible para las plantas es inferior a 3,5 mg/kg, lo que obliga la suplementación con fertilizantes fosfóricos.
Lina Margarita Moreno-Conn, Marcela López Casallas, Fredy Mauricio Cruz Barrera   +2 more
doaj   +1 more source

Comportamiento de la infiltración en un oxisol

Revista U.D.C.A Actualidad & Divulgación Científica, 2010
El estudio de las técnicas de infiltración de agua en el suelo permite entender los procesos hidrológicos, la degradación de suelos y el transporte de solutos, siendo un soporte significativo, para minimizar los métodos de escorrentía superficial. El objetivo del presente trabajo fue evaluar el comportamiento de la infiltración, a través de los modelos
Orjuela-Matta, Helber M., Rubiano Sanabria, Yolanda, Camacho-Tamayo, Jesús Hernán   +2 more
openaire   +5 more sources

Fontes de potássio em solos distroférricos cauliníticos originados de basalto no Rio Grande do Sul Potassium-bearing minerals in two oxisols of Rio Grande do Sul State, Brazil

Revista Brasileira de Ciência do Solo, 2004
Este estudo teve como objetivo identificar os minerais fonte de K em dois solos originários de basalto: um Latossolo Vermelho distroférrico típico e um Nitossolo Vermelho distroférrico típico. A análise mineralógica por difratometria de raios-X mostrou a
G. W. Melo, E. J. Meurer, L. F. S. Pinto
doaj   +1 more source

Convergent adaptations: bitter manioc cultivation systems in fertile anthropogenic dark earths and floodplain soils in central Amazonia [PDF]

, 2012
Shifting cultivation in the humid tropics is incredibly diverse, yet research tends to focus on one type: long-fallow shifting cultivation. While it is a typical adaptation to the highly-weathered nutrient-poor soils of the Amazonian terra firme, fertile
Alessandro Alves-Pereira, André Braga Junqueira, Charles Roland Clement, James Angus Fraser, Lee A. Newsom, Nivaldo Peroni   +5 more
core   +5 more sources

Enrichment of organic carbon in sediment transport by interrill and rill erosion processes [PDF]

, 2008
Erosion and loss of organic carbon (OC) result in degradation of the soil surface. Rill and interrill erosion processes on a silt loam soil were examined in laboratory rainfall and flume experiments.
Cornelis, Wim, Gabriëls, Donald, Hofman, Georges, Schiettecatte, Wouter   +3 more
core   +1 more source

Indigenous arbuscular mycorrhiza is more important for early growth period of groundnut (Arachis hypogea L.) for P influx in an Oxisol

Acta Agriculturae Slovenica, 2008
The contribution of indigenous arbuscular mycorrhiza (AM) on phosphorus (P) uptake by groundnut was examined in a low P field soil. The fungicide benomyl was applied to eradicate mycorrhizal infection. The treatments consisted of three P levels viz.
Amitava RAKSHIT, P.B.S. BHADORIA
doaj   +1 more source

AUSÊNCIA DE MICORRIZAS VESÍCULO-ARBUSCULARES EFETIVAS EM LECYTHIDACEAS NUMA ÁREA DE FLORESTA PRIMÁRIA DA AMAZÔNIA CENTRAL. [PDF]

Acta Amazonica, 1997
As Lecythidaceae compreendem uma das quatro famílias de árvores mais abundantes na floresta amazônica, mas foram pouco estudadas no que sc refere à simbiose com fungos micorrízicos dos solos.
F.W. MOREIRA, L.A. de OLIVEIRA, P. BECKER   +2 more
doaj   +1 more source

Variabilidad espacial de atributos físicos de un Typic Haplustox de los Llanos Orientales de Colômbia Spatial variability of physical attributes in a typic haplustox in the eastern planes of Colombia

Engenharia Agrícola, 2008
O objetivo deste trabalho foi estudar o comportamento da variabilidade espacial da resistência mecânica à penetração (RP), da densidade do solo, da densidade de partículas do solo, da porosidade total e dos teores de areia, silte e argila, e as relações ...
Leonardo Ramírez-López, Amparo Reina-Sánchez, Jesús H. Camacho-Tamayo   +2 more
doaj   +1 more source