Effects of longterm reduced tillage on structure and fertility of a silty clay soil [in Finland]

aradura cero-labranza clay soils disponibilidad de nutrientes estructura del suelo finland finlande finlandia harrowing hersage infiltration labour labranza maquinaria de labranza methode methods mouvement de l'eau dans le sol movimiento del agua en el suelo nutrient availability ploughing rastreo seedbed preparation silty soils sistema poroso del suelo soil pore system soil structure soil water movement sol argileux sol limoneux structure du sol suelo arcilloso suelo limoso tillage tillage equipment travail du sol zero tillage