Which of the following added to a soil would be likely to result in the greatest level of soil organic matter after several years of decomposition?
A) 5 mg of carbon in plant tops
B) the compost produced by composting 5 mg of plant leaf material
C) the manure produced by feeding cattle 5 mg carbon in plant residues
D) 5 mg of carbon in plant roots
D
You might also like to view...
Which of the following transformers is the most appropriate type of transformer to use for series street lighting?
a. Current transformer b. Constant-current transformer c. Potential transformer d. Buck-and-boost transformer
A series circuit has 2 100-ohm resistors and 2 200-ohm resistors. What is the total resistance?
a. 100 ohms b. 200 ohms c. 300 ohms d. 600 ohms
Vertisols are characterized by high contents of swelling-type silicate clays
Indicate whether the statement is true or false
A ball bearing that is on a shaft or in a housing should be removed:
A) By applying pressure only to the race that is supported securely B) Only by pressing on the inner race when the outer race is in a housing or by pushing on the outer race when the inner race is on a shaft C) By pressing on and supporting any part of the bearing that is available D) B and C above