SciELO - Scientific Electronic Library Online

 
vol.21 número1Utilización de abejorros nativos (Bombus atratus Franklin y Bombus bellicosus Smith) para mejorar la producción de semillas del trébol rojo (Trifolium pratense)Estrategias para minimizar el consumo de agua del cultivo de arroz en Uruguay manteniendo su productividad índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Links relacionados

Compartilhar


Agrociencia Uruguay

versão impressa ISSN 1510-0839versão On-line ISSN 2301-1548

Resumo

BERETTA, Andrés Nicolás et al. Titratable Acidity at pH = 7 Estimated from the pH of a Soil:Buffer Mixture. Agrociencia Uruguay [online]. 2017, vol.21, n.1, pp.105-108. ISSN 1510-0839.

The value of titratable acidity in soil pH = 7 (AT_pH7) is used for taxonomic purposes and to estimate lime requirement. AT_pH7 could be predicted by the pH value of the mixture soil:buffer solution (pH_equilibrium). Calcium acetate buffered at pH = 7 was added to each sample and pH_equlibrium and alkali required to reach pH = 7 were measured. With pH_equilibrium the AT_pH7 was estimated by regression (AT_eq) and by the amount of alkali neutralized to achieve pH_equilibrium (AT_OH). There was an acceptable fit between AT_pH7, AT_eq and AT_OH, but their differences were not normally distributed. Both, AT_OH and AT_eq, underestimated the AT_pH7 average. The pH_equilibrium value was more accurate than AT_pH7, while AT_eq and AT_OH measurements were less accurate. The use of AT_OH and AT_eq did not introduce significant errors in classifying the soils by their saturation in bases. Both measurements wereperformed in a shortertime than AT_pH7.

Palavras-chave : saturated soil; desaturated soil; cation exchange capacity; base saturation; potential acidity.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )