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

Kind of flowers, how do some flower make there own food

how do some flower make there own food

Importance of nutrition, Define  Nutrition  Nutrition  is a science th...

Define  Nutrition  Nutrition  is a science that cuts across several scientific disciplines, of which one  is 'biochemistry'.  It  is  the  science  that  relalks  food  to the

Preparation of guidance charts for first aid , Preparation of Guidance Char...

Preparation of Guidance Charts for First Aid Your Counsellor will form groups of four students. Using the materials from the sections of Unit 16 mentioned in each case below, each

A model reaction water turbine, A model reaction water turbine Use a so...

A model reaction water turbine Use a soda water bottle from which the bottom has been separate. Wind string around it near the bottom end and suspend it as shown in the diagram

Spell, How long will it take me to get my ged.

How long will it take me to get my ged.

Photochemical smog, Photochemical Smog: Photochemical  smog, a  seconda...

Photochemical Smog: Photochemical  smog, a  secondary Pollutant,  results when  the two pollutants, nitrogen  oxide and hydrocarbons  found  in  automobile exhausts, react with

Why did the continents spread apart, Why did the continents spread apart? ...

Why did the continents spread apart? This is because of the heat generated from the earth's interior and earthquakes - the convection currents deep within the earth due to the m

To study a hailstone, To study a hailstone When it hails, collect some ...

To study a hailstone When it hails, collect some of the hailstones. Cut them in half and view how the ice of the hailstone has been built up in layers. If you live in a region

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