Critical Thinking Questions
16. What type of plant problems result from nitrogen and calcium deficiencies?
17. Research the life of Jan Babtista van Helmont. What did the van Helmont experiment show?
18. List two essential macronutrients and two essential micro nutrients.
19. Describe the main differences between a mineral soil and an organic soil.
20. Name and briefly explain the factors that affect soil formation.
21. Describe how topography influences the characteristics and fertility of a soil.
22. Why is biological nitrogen fixation an environmentally friendly way of fertilizing plants?
23. What is the main difference, from an energy point of view, between photosynthesis and biological nitrogen fixation?
24. Why is a root nodule a nutritional adaptation of a plant?