« previous next »

Author Question: According to the Soil Conservation Service, it takes about ____ to form topsoil from the subsoil ... (Read 22 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?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

Everyone has one nostril that is larger than the other.

Did you know?

There are actually 60 minerals, 16 vitamins, 12 essential amino acids, and three essential fatty acids that your body needs every day.

Did you know?

Historic treatments for rheumatoid arthritis have included gold salts, acupuncture, a diet consisting of apples or rhubarb, nutmeg, nettles, bee venom, bracelets made of copper, prayer, rest, tooth extractions, fasting, honey, vitamins, insulin, snow collected on Christmas, magnets, and electric convulsion therapy.

Did you know?

The average office desk has 400 times more bacteria on it than a toilet.

Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants. Some of the bacteria that can fix atmospheric nitrogen, converting it into a form usable by plants.
Technical service bulletins (TSBs) are issued by vehicle manufacturers when a fault occurs that ... Technical service bulletins (TSBs) are issued by vehicle manufacturers when a fault occurs that ...
Covering the interior as soon as the vehicle comes in for service helps improve customer ... Covering the interior as soon as the vehicle comes in for service helps improve customer ...
Note the discovery as the air filter housing was opened during service on a Pontiac Bonneville. The ... Note the discovery as the air filter housing was opened during service on a Pontiac Bonneville. The ...
Soil texture "تركيبة التربة" Soil texture "تركيبة التربة"
Z/W inheritance of feather form in poultry is revealed by analysis of reciprocal crosses Z/W inheritance of feather form in poultry is revealed by analysis of reciprocal crosses
Video: What are Strong & Weak Acids and How they're different?

For a complete list of videos, visit our video library