Monday, March 26, 2012

Which of the following elements required by plants does NOT come directly from the soil? a. carbon b. nitrogen c. magnesium d. potassium e. iron


 Which of the following elements required by plants does NOT come directly from the soil?
a. carbon
b. nitrogen
c. magnesium
d. potassium
e. iron

Answer :-  a. carbon
at

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