00481    a2200145   4500020001500000082001600015100001900031245010300050260006900153300001600222440000600238650001700244650005700261650001700318  a9157652147  a631.43bGRA  aGrath, Thomas   aEffects of agricultural machinery traffic on pea growth ans penetration resistance in the subsoil   aUppsalabSwedish University of Agricultural Sciencesc1996g1996  a136p.c24cm  a   aSoil physics  aSpecific techniques; apparatus, equipment, materials  aSoil science