[Effects of irrigation on the bases content and nutrient availability of wet rough pastures on clay, sand and peat soils: field observations and laboratory experiments]

base saturation clay soils flooding grasslands herbage inondation iron oxides irrigation de surface netherlands peat soils phosphate piritas praderas pyrite pyrites riego de superficie sandy soils sol argileux sol sableux sol tourbeux suelo arcilloso suelo arenoso suelo turboso surface irrigation