00497nam a2200157Ia 4500008004100000020001500041082001600056100004800072245004900120260005000169300000800219650004100227650003400268653002000302653001700322170901s1957    xx            000 0 und d  a0112408893  a631.4bG72S  aMinistry of Agriculture, Fisheries and Food 0aSoil Physical Conditions and Crop Production  aLondonbHer Majesty's Stationery Officec1957  a505  aAgriculture and related technologies  aTechnology (Applied sciences)  aCrop production  aSoil physics