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).
Nitrogen in the NH 4 + -N form is not subject to this loss. Management alternatives are available if denitrification losses are a potential problem. Significant losses from some surface-applied N sources can occur through the process of volatilization. In this process, N is lost as ammonia (NH3) gas.