Field study of soil TKN from land application of wastewater

Runbin Duan, Clifford Fedler

Research output: Contribution to journalArticlepeer-review


An accurate nitrogen mass balance is necessary when designing a municipal wastewater land application system in order to reduce the potential for nitrogen contamination of groundwater. Limited information on soil total Kjehldahl nitrogen (TKN) is available to estimate the TKN variance in the soil that can be used for calculating the nitrogen mass balance. This study investigated the soil TKN temporal variance at two different depth ranges within three different soil types irrigated with municipal wastewater effluent in a short-term at a long-term running site under field conditions. Three plots were chosen with each plot growing different plants and with different soil types in Lubbock, Texas, USA. Kruskal–Wallis one way analysis of variance on ranks and Mann–Whitney rank sum test were employed to compare the differences of medians of many groups of data and of two groups of data at p < 0.05, respectively. The results show that there was no significant difference among the medians of
Original languageEnglish
Pages (from-to)1-4
JournalEcological Engineering, Elsevier
StatePublished - Oct 2015


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