Article Abstract:
On-site septic systems are a source of local and regional groundwater contamination in the US and elsewhere. The New Jersey Pinelands area is characterized by sandy soil, underlain by a water-table aquifer. The Pinelands Commission, a regional land use planning and regulatory agency, allows the use of subsurface pressure dosing septic systems as an alternative to standard systems. The assumption that pressure dosing systems remove much of the wastewater nitrogen was tested, but no significant difference in nitrogen removal was found between system types.
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Article Abstract:
The result of the analysis of land use history shows the high species diversity in the soil comes from the combined action of high pH, high calcium carbonate content, high age of turf, lack of fertilization and grazing. Land use history is studied from the fifty plots of grassland on well-drained soil and the specific composition of vascular plants, macrofungi, bryophytes, lichnes, hepatics and other environmental variables of the soils are analysed.
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Article Abstract:
Northern Ireland's grasslands were subjected to a mass balance model to determine the level of nitrogen deposition. The results showed that the region's grasslands yielded no net organic nitrogen accumulation. After eliminating all possible causes of the zero nitrogen accumulation, it was hypothesized that about 78% of Northern Ireland's grasslands lost its nitrogen through denitrification, ammonia volatilization or other unknown processes.
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