Q: A farmer wants to know if adding fertilizer to his field will make his crops healthier. Which activity should the farmer do first?
What is the correct answer to this question?
Pick from:
+Plant different crops in a nearby fertilized field.;
+Water the crops in the field before adding fertilizers.;
+Add many different fertilizers to the field at once.;
+Record the appearance of the crops before fertilizing.;...A:
Record the appearance of the crops before fertilizing.