Each USFarm Worker Currently Produces Enough Food for 105 People

Q58: Juvenile hormones act by speeding up insect

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

Q64: The conversion of phosphate rock and bone

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