00386nam a2200121Ia 4500008004100000082001500041100002400056245007300080260002900153300001400182600002800196650004000224140224s9999    xx            000 0 und d  a631.412 L2  aHillel, Daniel, ed.  aOptimizing the soil physical environment toward greater crop yields/  aNew YorkbAcademicc1972  axxi,240p.  aEdited by Daniel Hillel  aSoil science,Environment,Physiology