What is the independent variable in this experiment?

An experiment tested the effect of fertilizer on the growth of several varieties of soybeans. For each experiment there are three rows of each variety. The center rows are the experimental plants. The outer rows are the controls. What is the independent variable in this experiment?What is the independent variable in this experiment?
The varieties of soybeans..What is the independent variable in this experiment?
the independent variable is the "cause" in the cause and effect relationship.



in general: went you want to know the the "effect of __________ on __________"



the first blank in the independent variable, and the second blank in the dependent variable.



so for: "effect of fertilizer on the growth of several varieties of soybeans"



independent variable: fertilizer

dependent variable: the growth of several varieties of soybeansWhat is the independent variable in this experiment?
If the same fertilizer is being used throughout the experiment, then the independent variable would be the different types of soybeans and how they鈥檙e affected by the fertilizer.

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