Low-Cost NIR Spectroscopy Versus NMR Spectroscopy for Liquid Manure Characterization.

ABSTRACT: Accurate characterization of liquid manure properties, such as dry matter (DM), total nitrogen (TN), ammonium nitrogen (NH₄-N), and total phosphorus (TP), is essential for effective nutrient management in agriculture. This study investigates the use of near-infrared spectroscopy (NIRS) within the 941-1671 nm range, combined with advanced pre-processing and machine learning techniques to accurately predict the liquid manure properties. The predictive accuracy of NIRS was assessed by comparison with nuclear magnetic resonance (NMR) spectroscopy as a benchmark method. A number of 51 liquid manure samples were analyzed in the laboratory for the reference manure properties and scanned with NIRS and NMR. The NIR data underwent spectral pre-processing, which included two- and three-ban

SUBMITTER: Eslamifar M 

PROVIDER: S-EPMC12609543 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature