« previous next »

Author Question: According to the Soil Conservation Service, it takes about ____ to form topsoil from the subsoil ... (Read 81 times)

jparksx

  • Hero Member
  • *****
  • Posts: 570
on: Jul 21, 2018
According to the Soil Conservation Service, it takes about ____ to form topsoil from the subsoil parent material.
 
  a. 15 years c. 25 years
  b. 20 years d. 30 years

Question 2

Chlorinated hydrocarbons such as chlordane, toxaphene, and DDT could last ____ or more in the soil.
 
  a. 5 years c. 80 years
  b. 20 years d. 100 years


connor417

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 21, 2018
Answer to Question 1

D

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.

Did you know?

According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Did you know?

Cyanide works by making the human body unable to use oxygen.

These two species of bedstraw grow predominately on different soil types: Galium saxatile (shown her These two species of bedstraw grow predominately on different soil types: Galium saxatile (shown her
MDCK cells can form cysts in culture MDCK cells can form cysts in culture
Instructions for Completing the CMS-1500 (02/12) Claim Form Continued Instructions for Completing the CMS-1500 (02/12) Claim Form Continued
Write the equation in general form of the line passing through the point Write the equation in general form of the line passing through the point
Wildlife Conservation Wildlife Conservation
An electrician charges a flat fee of $90 for a home service call. In addition he charges $25 ... An electrician charges a flat fee of $90 for a home service call. In addition he charges $25 ...
Video: Knee Animation

For a complete list of videos, visit our video library