Fill-in each space below with the correct word or words. Correct answers are in red . Where more than one answer is acceptable the additional correct answers are in blue . The bacteria called rhizobia live symbiotically in the roots of legumes. Compost is an example of an organic fertilizer, whereas ammonium phosphate is an example of an inorganic fertilizer.
Plant roots take in or absorb nutrient ions, whereas soil colloids adsorb ions.