Since soluble salt toxicity symptoms are not specific to only ...

[WWatsford]

Since soluble salt toxicity symptoms are not specific to only soluble salt damage but to numerous other
  problems, ____ is recommended.

 
 

a. a soil test by a reputable laboratory
  b. a soil test by the interiorscaper
  c. a salt test by the interiorscaper
  d. a mineral test by a reputable laboratory

Question 2

Abiotic soluble salts may accumulate in soils and over time may ____ plant roots.
 
 

a. dry out c. attract insect pests to
  b. become beneficial to d. become toxic to

[T4T]

Answer to Question 1

A

Answer to Question 2

D

[WWatsford]

Thanks for the timely response, appreciate it

[sultansheikh]

Excellent