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

Define the term blood, Define the term Blood “The ancients believed th...

Define the term Blood “The ancients believed that blood was the seat of the emotions".  Blood, a body fluid, has been correctly termed as an elixir of life. We all have blood

Chemical reactivity, Chemical reactivity : The substances which react viol...

Chemical reactivity : The substances which react violently or produce flame on contact with water can be given suitable chemical treatment to convert them into nonreactive form be

Centralised cataloguing, advantages and disadvantages of centralised catalo...

advantages and disadvantages of centralised cataloguing

Define the applications of thermodynamics, Define the Applications of Therm...

Define the Applications of Thermodynamics Thermodynamics has extremely wide applications because basis of thermal engineering. Approximately all process and agriculture, transp

What is an ionic crystal, What is an ionic crystal? An ionic crystal is...

What is an ionic crystal? An ionic crystal is one in which ionic bonds form the structure, or lattice, of the crystal. The ions that come together to form these structures must

Environment and waste minimisation, Environment and Waste Minimisation   ...

Environment and Waste Minimisation   Your first assessment will cover the design of a monolith reactor for the VOCs removal. Therefore, you are asked to do the following:

What is the important role of vitamin k, What is the important role of Vita...

What is the important role of Vitamin K Vitamin K , as you may already know, is a fat-soluble vitamin that plays an  important role  in  blood  clotting. It was  first observe

Safety spectacles in personal protective devices, Safety spectacles : Safe...

Safety spectacles : Safety spectacles need to be used where there is the slightest risk of splashes of chemicals or fragments of dust, glass, etc. getting into the eyes.

Characteristic of Light, Does the frequencies of the colors of the light in...

Does the frequencies of the colors of the light increase from red to violet?

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