00501nam a2200169Ia 4500008004100000020001500041082001700056100001200073245006400085260004200149300000800191650004100199650003400240653002000274653001700294700002000311170901s1979    xx            000 0 und d  a0471997579  a631.42bL14S  aLal, R. 0aSoil Physical Properties and Crop Production in the Tropics  aChichesterbJohn Wiley and Sonsc1979  a551  aAgriculture and related technologies  aTechnology (Applied sciences)  aCrop production  aSoil physics  aGreenland, D.J.