00530nam a2200157Ia 4500008004100000020001500041082001600056100005200072245007800124260005000202300000800252650004100260650003400301653002000335653001700355170901s1975    xx            000 0 und d  a0112408893  a631.4bG72S  aGreat Britain, Ministry of Agriculture and Food 0aSoil Physical Conditions and Crop ProductionbProceedings of a conference  aLondonbHer Majesty's Stationery Officec1975  a505  aAgriculture and related technologies  aTechnology (Applied sciences)  aCrop production  aSoil physics