Farm system boundaries: Discussion of system boundaries in Chapter 3 mainly relates to farms of this type. Briefly, boundaries of Type 2 farm systems (and of Types 1, 3 and 4) segregate them distinctly from the external world, but the boundaries between individual farms are relatively weak.
What is Chromium? Chromium is a steel-gray lustrous metal that is important as an additive in the manufacture of steel alloys (chrome steel, chrome-nickel steel, stainless steel) and greatly increases the durability and resistance of these metals; hence its use in metal prosthetic implants.
View All. Chromium is a dietary mineral found in trace amounts in the human body. It enhances the action of insulin, so it's important for the metabolism and storage of glucose. Chromium also appears to have a role in fat and protein metabolism. It's easy to get enough dietary chromium because it's found in small concentrations in most foods. A balanced diet that includes meats, whole grains, dairy products, fruits, and vegetables will provide all the chromium you need.