Properties and stocks of soil organic matter in soils developed from mill pond sediments. Dataset of soil organic matter stock and its properties

Soil properties including the data of soil organic matter stock and its properties (total organic carbon content, total nitrogen content, total organic carbon stocks, dissolved organic carbon content, dissolved organic nitrogen content, humification index, total organic carbon content in selected fractions of organic matter, optical properties of humic acids, elementar composition of selected extracted humic acids, 13C NMR spectra of selected extracted humic acids for samples collected from soil developed from the mill pond sediments in five former mill pond basins in Poland (Oleszek 53°07'43,2”N 18°48'09,0”E; Turznice 53°24'36,0”N 18°47'51,0”E ; Kałdunek 53°05'54,3”N 18°56'17,9”E; Kończewice 53°10'38,6”N 18°32'54,2”E).