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).
Although the conversion of ammonia to ammonium creates temporary alkaline conditions in the ammonia retention zone, the process of nitrification (conversion of ammonium to nitrate) is an acid-forming reaction, and the overall effect of AA applications is a reduction in soil pH.