Improved soil particle-size analysis by gamma-ray attenuation

被引:23
|
作者
Oliveira, JCM
Vaz, CMP
Reichardt, K
Swartzendruber, D
机构
[1] UNIV NEBRASKA,DEPT AGRON,LINCOLN,NE 68583
[2] UNIV SAO PAULO,CENA,SOIL PHYS SECT,BR-13400970 PIRACICABA,SP,BRAZIL
[3] EMBRAPA,CNPDIA,BR-13560970 SAO CARLOS,SP,BRAZIL
关键词
D O I
10.2136/sssaj1997.03615995006100010004x
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
The size distribution of particles is useful for physical characterization of soil. This study was conducted to determine whether a new method of soil particle-size analysis by gamma-ray attenuation could be further improved by changing the depth and time of measurement of the suspended particle concentration during sedimentation. In addition to the advantage of nondestructive, undisturbed measurement by gamma-ray attenuation, as compared with conventional pipette or hydrometer methods, the modifications here suggested and employed do substantially decrease the total time for analysis, and will also facilitate total automation and generalize the method for other sedimentation studies. Experimental results are presented for three different Brazilian soil materials, and illustrate the nature of the fine detail provided in the cumulative particle-size distribution as given by measurements obtained during the relatively short time period of 28 min.
引用
收藏
页码:23 / 26
页数:4
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