Cultivated organic soils in Sweden: properties and amelioration

agricultural soils agua del suelo chaulage clay soils cultivated land cultivation cultivo deep cultivation drainage drenaje eau du sol encalado fango fertilisation fertilizer application irrigation liming mud organic soils peat soils pratique culturale riego soil chemicophysical properties soil water sol agricole sol argileux sol organique sol tourbeux suecia suelo arcilloso suelo turboso sweden tierras cultivadas vase