Representatividade da fração da amostra de solo utilizada na determinação da estabilidade de agregados.

Abstract

This research evaluate the representability of the soil fraction sample (2,0-6,35 mm) utilized in the aggregate stability determination and its size class distribution. It was observed that there is no correlation between the used soil fraction sample and the results of aggregate stability and class size distribution. Nevertheless, it was verified that in average it is used just 20% of the initial soil sample. So, the 20g used for analyzes doesn’t represent the total amount of the collected soil. For better representative of soil aggregation, the work suggests that more questions have to be considered as: a bigger amount of sample have to be used, others characters of aggregates, for example density, roundness and spherecity, have to be studied.