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- W1978252607 abstract "The feasibility of using near infrared spectroscopy (NIRS) for rapid prediction of the composition of cattle and pig slurries was investigated. Samples with a total solids content from <1 to 15% were collected during a 3‐yr period and used for calibration and validation. Test samples were sealed in plastic bags and measured in a sample cell moved vertically during measurements. Reflectance data in the range 1200 to 2400 nm were used for calibration based on partial least square regression. Dry matter (DM), N, NH 4 –N, and P could be determined with r 2 values of 0.97, 0.94, 0.92, and 0.87, respectively. The ratios between analyte variation range standard deviation and the root mean square error of prediction (RMSEP) obtained on a calibration independent test set were 6.2 (DM), 4.3 (N), 3.8 (NH 4 –N), and 3.6 (P). Total C and plant‐available N (PAN) could be determined by near infrared spectroscopy with r 2 values of 0.94 and 0.89, but the same correlation was obtained by calculation from DM and NH 4 –N results, respectively. The applicability of NIRS for K, Mg, Ca, Na, S, Cu, and Zn analysis was also investigated. The r 2 values were in the range 0.41 to 0.82, with the poorest results for Na, Zn, and K. The corresponding SD/RMSEP ratios were in the range 1.2 to 3.5. We concluded that the applied NIRS methodology is suitable for rapid routine analysis of DM, C, N, NH 4 –N, P, and PAN in both cattle and pig slurries." @default.
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- W1978252607 date "2007-07-01" @default.
- W1978252607 modified "2023-09-28" @default.
- W1978252607 title "Application of Reflectance Near Infrared Spectroscopy for Animal Slurry Analyses" @default.
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- W1978252607 doi "https://doi.org/10.2136/sssaj2006.330" @default.
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