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

Improvement of techniques and crafts in golden era:, Improvement of Techniq...

Improvement of Techniques and Crafts : In this period, there was a spurt in agriculture, as new techniques and seeds were introduced. More importantly, the crafts greatly improv

Define coupled transport - secondary active transport, Define Coupled Trans...

Define Coupled Transport - Secondary Active Transport The transport of two substances may be coupled to each other because they bind to the same carrier in the cell membrane.

Science fair , what kind of questions do they ask at a science fair

what kind of questions do they ask at a science fair

Define solute-solvent interaction, Define Solute-Solvent Interaction A ...

Define Solute-Solvent Interaction A solution, as you may already know, is a mixture of solute (present in small amount) and solvent (present in large amount). The interaction b

Erkinson develpomental theory, Maureen is a 50 year old married mother of t...

Maureen is a 50 year old married mother of three school age children. She works part-time at the local bank as a teller. She is going through menopause and is finding it very annoy

1, what is a chemical

what is a chemical

Explain haemophilia, Explain Haemophilia Haemophilia is a disease char...

Explain Haemophilia Haemophilia is a disease characterized by excessive bleeding due to deficiency of clotting factor VIII. The patient need repeated blood transfusion or may

Explain pneumothorax - histotoxic hypoxia, Explain Pneumothorax - Histotoxi...

Explain Pneumothorax - Histotoxic Hypoxia It is a collection of air or gas in the chest or pleural space that causes a part or all of a lung to collapse. Due to the rupture of

Determine about the physico-chemical parameters, Determine about the Physic...

Determine about the Physico-chemical parameters The possible combination of various elements found in the earth's crust gives rise to a large number of minerals. Out of all the

Reproductive System, summary on parts of the reproductive system

summary on parts of the reproductive system

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