Particle size analysis - Particle size analysis Not all of...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Particle size analysis Not all of the mineral particles in a soil are the same size. The distribution of particle size determines the texture of the soil - whether it is predominantly sandy, loamy or clayey. Before the distribution of particle sizes can be determined, a classification of particles according to their size is needed. The one described here is the U.S. Department of Agriculture System. Particle size Class name 2mm Gravel (not normally included in particle size analysis, but does affect ease of tillage and water retention.) 1.0 - 2.0mm Very Coarse Sand 0.5 - 1.0mm Coarse Sand 0.25 - 0.5mm Medium Sand 0.125 - 0.25mm Fine Sand 0.05 - 0.125mm Very Fine Sand 0.02 - 0.05mm Coarse Silt 0.002 - 0.02mm Medium and Fine Silt 0.002mm Clay The procedure of determining the proportion of mineral particles in each of these classes is called Particle size analysis or Mechanical Analysis of the soil. The proportion of gravel and larger particles is determined by first grinding the soil to disaggregate it and then passing it through a 2mm sieve. What remains in the sieve is weighed and it's proportion calculated as a percentage of the whole soil sample. The proportion of the coarse, medium and fine
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/26/2010 for the course BLAW law taught by Professor Blllas during the Spring '10 term at University of Louisiana at Lafayette.

Page1 / 4

Particle size analysis - Particle size analysis Not all of...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online