Many farmers and gardeners compost their plant and animal waste. The living material naturany
decays in compost bins, forming a dirt-like substance that's rich in nutrients. The next season,
farmers use this substance as a natural fertilizer for their crops.
A biology student has grown tomato plants for several years. Until now, he used an artificial fertilizer
formulated for tomato plants. This fertilizer caused his plants to grow faster and taller than they grew
in unfertilized soil. The student wants to know whether using natural compost will cause his tomato
plants to grow faster and taller than his artificial fertilizer.
Answer the following questions to plan an investigation using the steps of the scientific method and
help the student find the answer to his question.
Part A
What are the student's observations and inferences before he starts his investigation?