A couple of references which use gaseous addition of NH3 or NO (which forms
NO2 then NO3) for doing isotope dilution. I have also heard of using 15N in
a dry carrier powder for disturbed soils but don't recall the citation.
Hope this helps
Murphy, D.V., I.R.P. Fillery, and G.P. Sparling. 1997. Method to label soil
cores with 15NH3 gas as a prerequisite for 15N isotope dilution and
measurement of gross mineralization. Soil Biol. Biochem. 29:1731-1741.
Murphy, D.V., A. Bhogal, M. Shepherd, K.W.T. Goulding, S.C. Jarvis, D.
Barraclough, and J.L. Gaunt. 1999. Comparison of 15N labelling methods to
measure gross nitrogen mineralization. Soil Biol. Biochem. 31:2015-2024.
Stark, J.M., and M.K. Firestone. 1995. Isotopic labeling of soil nitrate
pools using nitrogen-15-nitric oxide. Soil. Sci. Soc. Am. J. 59:844-847.
Dept. of Crop and Soil Sciences
3017 Ag & Life Sci. Bldg.
Oregon State University
Corvallis OR, 97331
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> -----Original Message-----
> From: Jennifer Bennett [SMTP:[log in to unmask]]
> Sent: Thursday, November 08, 2001 7:25 AM
> To: [log in to unmask]
> Subject: isotope dilution technique on dry soils
> Hi list members,
> Is anyone familiar with a good technique to assess gross N cycling rates
> in dry soils (ie avoid the confounding effect of adding solution with the
> Any insights or words of advice would be greatly appreciated.
> Jennifer Bennett
> Forest Nutrition Coop
> North Carolina State University
> 3106 Jordan Hall Box 8008
> Raleigh, NC 27695-8008
> (919) 513-4041
> (919) 515-7231 (fax)