00490nam a2200133Ia 4500008004100000082001600041100011500057245006600172260002800238300001000266600001900276600001600295650004500311140224s9999    xx            000 0 und d  a63.001.5 N4  aConference to celebrate the 150th anniversary of Rothamsted experimental station, Rothamsted, 14-17, Jul.,1993  aLong-term experiments in agricultural and ecological sciences  aWallingfordbCABIc1994  a428p.  aJohnston, A.E.  aLeigh, R.A.  aAgriculture,Longterm experiments,Ecology