Get Cheap assignment Help Online: What is organic food, and how is it now certified?
2.What are the different layers, or horizons, that compose the soil profile? What makes each one distinct from the others?
3.Name and describe the four major soil orders listed in this chapter. Where are they mainly found?
4.What are the main things that plant roots must obtain from the soil?
Name and describe a process (natural or unnatural) that can keep plants from obtaining the amounts of each of these things they need for survival.
5.What is organic food, and how is it now certified?