There are two common types of soil that are used in scientific studies, nutrient rich soil and nutrient poor soil. The predation of the seeds is not as important as the nutrient level of the soil. Different plants over time have adapted to grow in these different conditions over time. The acorns of the cork oak tree have better regeneration and development in nutrient rich soil. The smaller cotyledon acorns that grow in nutrient rich soil develop.= = = Acorn = = =
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