Multiple Choice
The conversion of phosphate rock and bone to "superphosphate" was significant because it
A) increased the phosphorus content of the rock or bones.
B) made the material more soluble.
C) incorporated phosphorus from the atmosphere.
D) did all of the above.
Correct Answer:
Verified
Correct Answer:
Verified
Q59: DDT was NOT effective against<br>A)foxes.<br>B)grapevine pests.<br>C)lice.<br>D)mosquitos.
Q60: There is still much arable land on
Q61: Using fresh manure as fertilizer for fruits
Q62: Which fertilizer is also an explosive?<br>A)NBr₃<br>B)NH₄NO₃<br>C)NaI<br>D)Sr₃(PO₄)₂
Q63: Each U.S.farm worker currently produces enough food
Q65: Sulfur is needed by plants for<br>A)nitrogen fixation.<br>B)nucleic
Q66: Organic farming uses no synthetic fertilizers or
Q67: All of the following are goals of
Q68: Nitrogen must be "fixed" to convert it
Q69: Explain the biological magnification of DDT and