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

What is classic technique of recipient operation, What is Classic Technique...

What is Classic Technique of Recipient Operation ? In this method, portions of left and light atria of both recipient and donor are retained. There is more atrial tissue of rec

Clouds formed at the highest altitude, Which are clouds formed at the highe...

Which are clouds formed at the highest altitude: cirrocumulus

A simple balance of pulley, A simple balance Suspend a ruler by loops o...

A simple balance Suspend a ruler by loops of cord a short distance above a table top, as shown in the diagram. When the ruler is in balance, place identical coins in dissimilar

Explain immunoglobulin a - classification of antibodies, Explain Immunoglob...

Explain Immunoglobulin A - Classification of Antibodies Present in secretions, protects mucosal surfaces. It is found in tears, saliva, and gastrointestinal secretion, respirat

Construction standards set by bureau of indian standards, CONSTRUCTION STAN...

CONSTRUCTION STANDARDS SET BY BUREAU OF INDIAN STANDARDS : At the construction stage itself, the design of the laboratory buildings should be made in accordance with safety norms.

Heat transfer, heat always from where things to where things

heat always from where things to where things

Air pollution by particulates, Air pollution by Particulates: Particula...

Air pollution by Particulates: Particulates constitute the third category of air pollutants. These are mostly fine carbon particles (less  than 0.002 mm  in diameter)  formed b

Arthropoda, structure and function of respiratory organs in arthropoda with...

structure and function of respiratory organs in arthropoda with diagram

Cosmic distances, Cosmic Distances: If  we asked you what the distanc...

Cosmic Distances: If  we asked you what the distance between Delhi and Kanyakumari is, you would say that it  is roughly 3000 km. Another way of answering the question would

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