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Effect of nitrification inhibitor on N immobilization and release of 15N from nonexchangeable ammonium and microbial biomass
Author(s):Paul, E. A.; Juma, N. G.
Date Issued:1983-05
Format:born digital; articles
The disposition of 15N-aqua NH3 and 15N-solution urea in the presence and absence of a nitrification inhibitor [4-amino-1,2,4-triazole (ATC)] was measured under field conditions. ATC caused a 15% greater recovery of ...
Natural nitrogen-15 abundance of soil and plant samples
Author(s):Rennie, D. A.; Johns, L. E.; Paul, E. A.
Date Issued:1976-02
Format:born digital; articles
Nitrogen isotope analysis of total soil N and soil-derived nitrate for nine selected Chernozemic and Luvisolic Ap horizons showed mean δa15N values based on atmospheric abundance of 8.8. Luvisolic soils were characterized ...
Automated analysis of 15N and 14C in biological samples
Author(s):Paul, Eldor A.; Harris, D.
Date Issued:1989
Format:born digital; articles
An automated method for the simultaneous analysis of total N, total C, 15N and 14C in small plant and soil samples is described. A commercial C-N analyser - continuous flow isotope ratio mass spectrometer (ANCA-MS) has ...
Fate of legume and fertilizer nitrogen-15 in a long-term cropping systems experiment
Author(s):Janke, Rhonda R.; Peters, Steven E.; Paul, Eldor A.; Hesterman, Oran B.; Harris, Glendon H.
Date Issued:1994-09
Format:born digital; articles
Relying more on biological N2 fixation has been suggested as a way to meet one of the major challenges of agricultural sustainability. A 15N study was conducted to compare the fate of applied legume and fertilizer N in a ...
Injection of nitrogen-15 into trees to study nitrogen cycling in soil
Author(s):Pregitzer, Kurt S.; Paul, Eldor A.; Horwath, William R.
Date Issued:1992-01
Format:born digital; articles
Most 15N dilution techniques disturb either the soil or N-pool size. The objective of this study was to develop a method of labeling the roots of Populus trees with 15N without physically disturbing the soil. Such a method ...