Construction managers, also called general contractors or project managers, typically do the following: 1  Prepare and negotiate cost estimates, budgets, and work timetables. 2  Select appropriate construction methods and strategies. 3  Interpret and explain contracts and technical information to workers and other professionals.
Denitrification is the process that converts nitrate to nitrogen gas, thus removing bioavailable nitrogen and returning it to the atmosphere. Dinitrogen gas (N2) is the ultimate end product of denitrification, but other intermediate gaseous forms of nitrogen exist (Figure 7).
Nitrification The conversion of ammonium to nitrite and then to nitrate is referred to as nitrification. Given aerobic soil conditions and soil temperatures above freezing, all forms of nitrogen in the soil, except nitrogen gas, are converted to the nitrate (NO 3 â) form by soil microorganisms.