00378nam a2200145Ia 4500008004100000020001500041082001800056100000500074245003700079260004400116300000800160650001300168650002900181700002200210140316s9999    xx            000 0 und d  a0851987451  a632.5bKRO/MO  a  aModelling crop weed interactions  aUnited KingdombCAB internationalc1993  a274  aAgronomy  acompetition for nitrogen  aKropff,M J et al.