Text: The climate and soil are such that plants and trees that would not normally survive this far north are capable of flourishing, which explains the enormous variety of 4,000 to 5,000 plants, trees, and shrubs from all over the world.
Entailment: Due to the nature of the soil and the climate, trees and plants that would usually be unable to survive so far north can actually flourish.
Contradiction: Very few plants and trees are able to survive in the conditions created by the climate and the soil.