Hi Tim,


The below papers by Richard Evershed, Ian Bull and Roland Bol might be
helpful.

Simpson IA, Bol R, Bull ID, et al.
Interpreting early land management through compound specific stable isotope
analyses of archaeological soils
RAPID COMMUN MASS SP 13: 1315-1319 (1999)


Bull ID, van Bergen PF, Bol R, et al.
Estimating the contribution of Spartina anglica biomass to salt-marsh
sediments using compound specific stable carbon isotope measurements
ORG GEOCHEM 30: 477-483 (1999)

Dungait JAJ, Evershed RP, Bol R
Compound-specific isotope tracing of organic compounds from dung in
temperate grassland soil
ABSTR PAP AM CHEM S 225: 098-GEOC Part 1 MAR 2003


Cheers,

Wolfram


-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf
Of Heaton, Timothy HE
Sent: 14 June 2005 15:09
To: [log in to unmask]
Subject: Manure effect on plant 15N


Can anyone point me to published information on the effect of animal/human
manure of the NATURAL ABUNDANCE 15N/14N ratio of crop plants?
In particular, comparisons of 15N/14N of manured versus non-manured plants
grown in otherwise identical conditions would be very useful.
Thanks.
Tim H.E. Heaton
NERC Isotope Geosciences Laboratory
British Geological Survey
Keyworth, Nottingham NG12 5GG, England
(www.bgs.ac.uk/nigl/index.htm)
Tel. +44(0)115 936 3401
Email: [log in to unmask]



*********************************************************************
This e-mail message, and any files transmitted with it, are
confidential and intended solely for the use of the addressee.
However, the information contained in this e-mail may subsequently
be subject to public disclosure under the Freedom of Information Act 2000
and, unless the information is legally exempt from disclosure, the
confidentiality of this e-mail and your reply cannot be guaranteed. If
this message was not addressed to you, you have received it in error
and any copying, distribution or other use of any part of it is
strictly prohibited. Any views or opinions presented are solely those
of the sender and do not necessarily represent those of the British
Geological Survey. The security of e-mail communication cannot be
guaranteed and the BGS accepts no liability for claims arising as a
result of the use of this medium to transmit messages from or to the
BGS. http://www.bgs.ac.uk
*********************************************************************