has document part Chemometric and Spectroscopic Characterization of Dissolved Organic Matter from Sewage Sludge Evaluation of the Effectiveness of near Infrared Reflectance Spectroscopy (NIRS) on Fe, Cu, Mn and Zn Estimation in Compost Use of Composted Sewage Slugs and Winery-distillery Wastes as Substrate in Intensive Tomato Cropping