Mineralogy and forms of potassium in red yellow latosol of a guava (Psidium guajava) tree orchard
Nenhuma Miniatura disponível
Data
2001-03-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Indian Counc Agricultural Res
Tipo
Artigo
Direito de acesso
Acesso restrito
Resumo
A trial was conducted during 1994-95 to study the effect of potassium fertilization on a guava (Psidium guajava L.) culture for 3 years. The control plots (without K) showed fruit production and potassium exportation that did not agree with the levels obtained by chemical analysis of the soil. Physical, chemical, mineralogic and morphologic analyses were performed on the red yellow latosol to identify minerals able to supply potassium, with emphasis on the fact that guava trees have a considerably widespread root system. The results obtained confirmed the presence of minerals in this soil that can supply potassium to the trees through weathering. Feldspars were identified in the silt fraction and micas in the clay fraction by X-ray diffractometry. The determination of total potassium revealed that the silt fraction of the soil had the largest absolute amounts of potassium, followed by clay. However, in view of its greater content, clay was the fraction that contributed most to the total amounts of potassium detected.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Indian Journal of Agricultural Sciences. New Delhi: Indian Counc Agricultural Res, v. 71, n. 3, p. 166-170, 2001.
