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Author Question: Saline-sodic soils are characterized by all but which one of the following? A) CaCO3 layer near ... (Read 53 times)

Zulu123

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Saline-sodic soils are characterized by all but which one of the following?
 
  A) CaCO3 layer near the soil surface
  B) exchangeable sodium percentage greater than 15
  C) sodium adsorption ratio greater than 13
  D) EC 4 dS/m or higher
  E) soil pH less than 8.5

Question 2

Which of the following correctly describes the relationship among the several methods available to measure electrical conductivity (EC) of soils?
 
  A) Electromagnetic induction method requires prongs to penetrate the soil.
  B) The saturation extract procedure is more accurate than the saturated paste method.
  C) The four electrode field sensor gives EC values about 2x those of the saturated paste method.
  D) The saturated paste method takes more time than the four electrode field sensor.
  E) The saturated paste extract method is the best field method.


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johnpizzaz

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Zulu123

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Reply 2 on: Jul 22, 2018
:D TYSM


miss_1456@hotmail.com

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Reply 3 on: Yesterday
Wow, this really help

 

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