Can someone please help me with this?

Can someone help me come up with something for this Design an experiment to test the effect of fertiliser on bean production in bean plants. Bean growers want to increase their crop yields to meet the growing demand for food. The ACME Fertiliser Co. has asked a botanist (you) to test their newest product, Growmore, on bean production to see if it has any effect on the growth of the beans. What reasearch do I need to do before the experiment ?? What is the hypothesis for your experiment ?? Independent variable - Dependent variable - Control variable - What is the results that would support the hypothesis ??