Nitrogen is available to plants as either ammonium (NH4+-N) or nitrate (NO3--N). Animal manures and other organic wastes can be important sources of N for plant growth. The amount of N supplied by manure will vary with the type of livestock, handling, rate applied, and method of application.
The cost to build a septic tank system varies widely, depending on your location. According to SepticTankGuide.com, a standard or conventional gravity system for a 3-bedroom home on a level site with good soil would likely cost from $1,500 to upward of $4,000.
According to the University of Minnesota, typical yearly costs for a mounded septic system might run as much as $500 as of the time of publication, including the costs of replacing pumps in these systems.he higher cost is necessary, however, if the site or soil condition makes it impossible to use a subsurface soil absorption system, according to the OSUES. Although installation costs vary depending on septic size and location, a mounded septic can run between $30,000 to $50,000 to construct.