00369nam a2200121Ia 4500008004100000082002900041100001500070245006400085260004100149300000900190600002400199600002400223140113s9999    xx            000 0 und d  a631.459:633.002(213)  L9  a" Lal,R. "  aSoil physical properties and crop production in the tropics  b"New York : John Wiley & sons, 1979"  a551p  a" Greenland, D. J."  a" Greenland, D. J."