Why Don't Plants Grow Well in Nutrient-Rich Soils That Contain

Multiple Choice

Why don't plants grow well in nutrient-rich soils that contain a high percentage of clay?

A) The clay binds to the nutrients making them unavailable to the plants.
B) The clay is very compact providing few open spaces for water and oxygen.
C) The clay holds onto water for a long time to the point that root rot often occurs.
D) Clay contains a high proportion of iron ions, which are toxic to plants.