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.
Chromium (0) is a steel-gray solid metal that is used for making steel and other alloys. It is also used in nuclear and high-temperature research. Compounds of chromium (III) and (VI) are used for chrome plating, manufacturing dyes and pigments, leather tanning, and wood preserving.Smaller amounts are used in drilling fluids, rust and corrosion inhibitors, textiles, and toner for copying machines.ompounds of chromium (III) and (VI) are used for chrome plating, manufacturing dyes and pigments, leather tanning, and wood preserving. Smaller amounts are used in drilling fluids, rust and corrosion inhibitors, textiles, and toner for copying machines.