Soil Total Carbon and Nitrogen - Surface
Total carbon and total nitrogen of surface soils from the LTER Main Site and the Successional and Forested sites. Total C and N are analyzed on one date annually of the baseline soil samplings. Samples are combusted and measured on a CHN analyzer. These samples are taken from the 0-25 depth.
This datatable is part of the Soil Total Carbon and Total Nitrogen on the Main Cropping System Experiment dataset. Soil carbon and nitrogen are presented as % elemental carbon and nitrogen (g C or N / 100 g soil) for the sampling depth of the specific sampling date unless indicated otherwise. Samples were taken with either a 2.5 cm diameter soil corer (sampling by soil depth) or a 10 cm diameter Giddings probe (sampling by soil profile). See Baseline Soil Sampling protocol for general sampling information. For specific sampling details for a particular date, see Soil Sampling Field Log. Soil samples are sieved to 4mm and composited by plot. Soil % elemental carbon and nitrogen values are determined by sample combustion and subsequent TCD gas chromatography, using a Carlo Erba automated CHN analyzer as described in the sampling protocol.
|Experiment:||Main Cropping System Experiment (MCSE)|
|Data available from:||June 1989 to April 2001|
|Core Areas||Organic Matter,Disturbance|
|sample date||date of sampling|
|n||number of analytical sample replicates||number|
|mean c||mean percent carbon||%|
|sd c||standard deviation percent carbon||%|
|mean n||mean percent nitrogen||%|
|mean cn||standard deviation percent nitrogen||%|
|sd cn||ratio: mean C divided by mean N||g/g|
|year||year in which the date occurs|