Discuss about the hydrometer method to determine soil, Science

Assignment Help:

Discuss about the Hydrometer Method to determine soil

Bouyoucos devised a simple and rapid technique using a specially designed hydrometer to determine sand, silt and clay content of soil without separating them. In this method a known amount of the air dry soil (say 50 g of fine soil) is dispersed in a known amount of water containing calgon (sodium hexametaphosphate) solution. After a certain period of time, in this case 40 seconds, when the largest particle (the sand) will have settled on the bottom of the cylinder, the density of the liquid is determined with the help of a hydrometer.  This gives a measure of the silt and clay in the soil. So, the 40 sec reading is the reading "grams of silt and clay in suspension".  Similarly, a density measurement is performed at two hours when the silt would also have settled. This two hour reading reads "grams of clay". The amount of sand is determined by subtracting the 40 second reading from the total amount. 

 


Related Discussions:- Discuss about the hydrometer method to determine soil

Explain increased cardiac output, Explain Increased Cardiac Output i) ...

Explain Increased Cardiac Output i)  An increase in blood volume increases the venous return and leads to an increased stroke volume. The increase in the blood volume may be d

Explain the submucous layer, Explain the Submucous Layer This layer con...

Explain the Submucous Layer This layer consists of loose areolar connective tissue. There are lymph vessels, plexuses of blood vessels and nerves. The nerve plexus is meissner'

Vision, What is vision and how is it connected to the brain?

What is vision and how is it connected to the brain?

How soil textural classes categorised, How soil textural classes categorise...

How soil textural classes categorised and what are is their significance? The soil textural classes are based on the percentage of the separate(s) which contributes maximum to

How complement system helps to handle microbial invasion, How Complement Sy...

How Complement System Helps To Handle Microbial Invasion 1)  Some components of a complement system coat microorganisms. These organisms with such a coat can be easily phagocyt

Issues related to safety management, Issues Related to Safety Management ...

Issues Related to Safety Management (i) Plant design - There was a major error in the plant design. There was no need of storing such a hazardous substance in such huge amount

Infectious diseases, Infectious diseases: Some of you may have heard ...

Infectious diseases: Some of you may have heard about the great bubonic plague, a fatal disease of the blood, spread by fleas and respiratory  secretions. It occurred in epid

Erosion, where can glacier erosion occur?

where can glacier erosion occur?

Explain fehling''s test, In Fehling's Test The free sugar group (aldehy...

In Fehling's Test The free sugar group (aldehyde or ketone) reduces the Cu  (cupric) ions in  an alkaline environment  to form Cu 10 (cuprous oxide) and the sugar is itself ox

Soil genesis, How can we know the parent material of soils?

How can we know the parent material of soils?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd