GMAT Verbal Reasoning Practice Test 6

Question : 45 of 100

Marks: +1, -0

A small amount of the magnesium salts from the first plot leached into the second plot.
Tomato plants in a third experimental plot, to which a high-nitrogen fertilizer was added, but no magnesium salts, produced 15 pounds of tomatoes.
Four different types of tomatoes were grown in equal proportions in each of the plots.
Some weeds that compete with tomatoes cannot tolerate high amounts of magnesium salts in the soil.
The two experimental plots differed from each other with respect to soil texture and exposure to sunlight.

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