[Field trials with short time stored sludge from Hedemarken Sewage Works (HIAS) and decomposed sludge from Sarpsborg Sewage Works (SR) 1992-94. Growing of barley and ryegrass. Trials at Kise]

amendement organique azote calcio calcium contenido de materia seca crop yield cultivos de primavera culture de printemps deep placement dry matter content fosforo heavy metals hordeum loam soils localisation en profondeur lodos residuales lolium metales pesados nitrogen noruega norway organic amendments phosphore phosphorus rendement des cultures rendimiento de cultivos sewage sludge sol sablolimoneux spring crops suelo franco temperatura temperature