N and P leaching from a clay soil under different crop rotations - Turtola, Eila; Nykänen, Arja (Nordiska Jordbruksforskares Förening (NJF), 1998)
Keywords: Ka; salaojavesi; typpi; fosfori; ravinteiden huuhtoutuminen; drainage water; uncultivated land; grass ley; cereals; fallow; organic farming