Abstract
A laboratory method has been developed to estimate the size distribution of cracks and both the number and size distribution of clods in artificially dried soil samples. Based on electro-optical determinations, the method was tested on samples of two clay soils: a Fluvisol and a Regosol. Percentage area distribution and percentage number distribution of clods of only the Fluvisol samples are reported. The total number of dimensional classes was 11 and the class interval 1.5 mm. Percentage size distribution of cracks of both Fluvisol and Regosol samples are also reported. The class interval was 0.2 mm and the total numbers of dimensional classes for the Fluvisol and Regosol samples were eight and seven, respectively. Mean deviations of four replicates are calculated. The variability of measurements depends mainly on differences among individual soil samples of each set, the instrumental error being less than 0.1%.
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