The high pH of sodic soils is due to the high saturation of the colloidal complex with calcium. ...

The high pH of sodic soils is due to the high saturation of the colloidal complex with calcium.
 
  Indicate whether the statement is true or false

Question 2

Sodic soils generally have better physical conditions than either saline or saline-sodic soils.
 
  Indicate whether the statement is true or false

Question 3

Loblolly pine tolerates higher levels of acidity than beech or maple trees.
 
  Indicate whether the statement is true or false

Question 4

Saline-sodic soils have electrical conductivities greater than 4 dS/m and a sodium adsorption ratio of less than 13.
 
  Indicate whether the statement is true or false

Question 5

The source of salts for some naturally occurring saline soils are ancient fossil deposits of salts in old lake beds.
 
  Indicate whether the statement is true or false