Methods
| Method ID: | 1 |
| Name: | Near Infrared Spectroscopy |
| Description: | Samples were dried at 70oC, and ground to pass a 1mm mesh screen. The dried and ground sample was scanned using a NIRSystems spectrophotometer. Foliar N, lignin and cellulose concentrations were predicted from the resulting spectral signatures. |
| Citation: | Bolster, K. L.; Martin, M. E., and Aber, J. A. 1996. Determination of carbon fraction and nitrogen concentration in tree foliage by near infrared reflectance: a comparison of statistical methods. Canadian Journal of Forest Research. 26(4):590-600. |
| Method ID: | 2 |
| Name: | ICP Analysis |
| Description: | Digestate was analyzed for Al, Ca, Fe, K, Mg, Mn, P and Sr using an inductively coupled plasma spectrometer. |
| Citation: | |
| Method ID: | 3 |
| Name: | TKN digestion |
| Description: | Samples were dried at 70oC, and ground to pass a 1mm mesh screen and digested using a modified TKN digestion using a selenium catalyst (Isaac and Johnson 1976). |
| Citation: | Isaac, R.A. and Johnson, W.C. 1976. Determination of total nitrogen in plant tissue using a block digestor. Journal of the AOAC 59: 98-100. |
| Method ID: | 4 |
| Name: | Microwave digestion |
| Description: | Samples were dried at 70oC, and ground to pass a 1mm mesh screen. Dried and ground foliage was digested using a microwave assisted acid digestion procedure. |
| Citation: | 1996. EPA method 3052: Microwave assisted acid digestion of siliceous and organically based matrices. In Test methods for evaluating solid waste update (III). U.S. Environmental protection agency, Washington, DC. |
| Method ID: | 5 |
| Name: | TKN Analysis |
| Description: | Analysis for the digestion of total foliar N was carried out using a Bran+Luebbe (Technicon) TRAACS 800 Autoanalyzer. |
| Citation: | |
| Method ID: | 6 |
| Name: | CHN Analysis |
| Description: | |
| Citation: | |
| Method ID: | 7 |
| Name: | DCP Analysis |
| Description: | Digestate was analyzed for Al, Ca, Fe, K, Mg, Mn, and P using a SpectraSpan III, ARL direct current plasma AES by Fisons Instruments Inc.. |
| Citation: | A.L. Page, R.H. Miller and D.R. Keeney (Eds), Methods of soil analysis chemical and microbiological properties, 2nd Edn, Vol. 2. America Society of Agronomy, Madison, WI (1982) |
| Method ID: | 8 |
| Name: | Dry Ash |
| Description: | Foliage samples were dry ashed at 485 degrees C; taken up in 10% HCl. |
| Citation: | Munter, R.C. 1982. Current methods used by Research Analytical Laboratory University of Minnesota, St. Paul. |
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