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

Use of fire extinguishers , Use of Fire Extinguishers : We know that one t...

Use of Fire Extinguishers : We know that one type of fire extinguisher cannot serve the purpose on all kinds of fire. In this subsection you will study about the use of different

Maintaining laboratory safety, OBLIGATIONS OF THE TEACHERS AND THE HEAD OF ...

OBLIGATIONS OF THE TEACHERS AND THE HEAD OF THE INSTITUTION TOWARDS MAINTAINING LABORATORY SAFETY Safety in laboratory work is the collective responsibility of the Head of the

Genetics, my topic is QTL mapping of Aedes and Drosophila and I am not gett...

my topic is QTL mapping of Aedes and Drosophila and I am not getting proper information for making an assignment on it what should I do?

Health and fertility, In recent years research have shown that women's two...

In recent years research have shown that women's two potentially critical cues are shape and weight. Generally, the shape in women a female physical attractiveness judgements are

Judicious use of plant/animal material for lab, Judicious use of Plant/Anim...

Judicious use of Plant/Animal Material for Lab. Purposes Live or preserved biological material is an essential requirement in all bio-labs. This material needs to be brought in

Decline of european science, Decline of european science: By the middle...

Decline of european science: By the middle of  the second century B.C., the Greek empires were collapsing in  anarchy andunder the weight of  the more vigorous power of Rome. I

Plant cells, what is the plant cells roll?

what is the plant cells roll?

Miscellaneous dangerous substances , Miscellaneous Dangerous Substances : ...

Miscellaneous Dangerous Substances : This was introduced in the United Kingdom to identify other hazardous substances and consists of a black exclamation mark on a white backgroun

Heat crossword, what is the unit that heat is measured in

what is the unit that heat is measured in

Lab animals, LAB ANIMALS : In this section, we shall deal with the importa...

LAB ANIMALS : In this section, we shall deal with the important aspects concerning lab animals. You are advised to be familiar with regulations concerning experiments on animals w

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