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

Electrodes, working of calomel electrode

working of calomel electrode

Differences between tumor staging and tumor grading, Describe the differenc...

Describe the differences between tumor staging and tumor grading, and how each is performed. Relate the role of your particular imaging modality in staging and or grading, if any

Light, which state of matter does light travel the fastest through

which state of matter does light travel the fastest through

Balanced diet, Balanced diet: We have dealt with quality and quantity o...

Balanced diet: We have dealt with quality and quantity of food. Both of  these should be balanced in a diet. A balanced diet is a combination of various foods which can fulfil

Explain the urine creatinine test, Explain the Urine Creatinine Test Th...

Explain the Urine Creatinine Test This test measures the amount of creatinine in urine. A measurement of the serum creatinine level is often used to evaluate kidney function. U

Explain the transport of carbon dioxide in solution, Explain the Transport ...

Explain the Transport of Carbon Dioxide in solution Carbon dioxide is amore soluble gas than oxygen.  Its amount in solution is proportional to the tension. At a tension of 40

Cement and concrete, Cement and concrete Secure a small bag of Portland...

Cement and concrete Secure a small bag of Portland cement. Have the pupils mix it with water and put it in tin can covers, paper cups, or small pasteboard boxes unless it harde

Cycling of materials in ecosystem, Cycling of materials in ecosystem: L...

Cycling of materials in ecosystem: Living organisms require four nutrients in relatively large amounts, these are carbon. oxygen, nitrogen and hydrogen. They also require phosp

Define fats - nutritional components, Define Fats - Nutritional Components ...

Define Fats - Nutritional Components Once the body stops eating, it begins to live on its fat. Fat storing depots 'adipocytes' are located in the different parts of the body. I

Describe wet bulb thermometer, Question: a) Describe wet bulb thermomet...

Question: a) Describe wet bulb thermometer and wet bulb temperature. b) What happens to the volume of a rising parcel of air and of a sinking parcel of air? c) What do yo

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