TSIP Data Insights Demo:

Your Farm At A Glance

Executive Summary

The contents of this report provide an analysis of total carbon measured across in . The objective of this study was to assess the current levels of soil carbon content at .

Samples were sent to Ward Lab in Kearny, NE and analyzed for total carbon by dry combustion [1].

Using the Soil Survey Geographic Database (SSURGO) to estimate bulk density on the farm, carbon stocks were calculated for [2].

Key Take Aways

Soil Carbon Concentrations

Soil carbon concentrations for 0-15 cm and 15-30 cm were calculated by field (Table 1). Concentrations were calculated as a percentage and in mg of C / g of soil for clarity of interpretation. The units convey the same information and are considered equivalent.

Table 1. Average total soil carbon (%) by depth

Statistical Analysis

Total carbon concentrations between groups, such as fields, were compared with an ANOVA and post-hoc Tukey test and determined to be significantly different from one another if the resulting p-value was less than 0.05. Samples above two standard deviations from the mean were considered outliers and removed from analysis [3]. For more information, refer to the methods section of the Appendix.

Select a variable to group your statistical analysis by

Appendix

Footnotes

[1] Ward Laboratories Summary of methods for dry combustion. This method does not distinguish between organic and inorganic matter. This method quantitatively determines the amount of carbon in soil using a resistance furnace for combustion. It is based on the method originally described by Dumas and later modified by Sweeney (1989). A dried and ground sample is ignited in an oxygen rich combustion chamber at 1350o C. An aliquot of the combustion gas is passed through an infrared absorption detector for carbon determination. The gas is then passed through a copper catalyst to remove oxygen converting nitrous oxides to N2 and then swept through an absorber column to remove moisture and carbon dioxide. The remaining gas passes through a thermal conductivity detector for nitrogen determination.

[2] Bulk density values from SSURGO do not account for land management and are lower resolution than in-situ soil measurements.

[3]

Credits

Statistical analysis and map creation was carried out in R Base map credits: Leaflet | Tiles Esri – Source: Esri, i-cubed, USDA, USGS, AEX, GeoEye, Getmapping, Aerogrid, IGN, IGP, UPR-EGP, and the GIS User Community.