00314nam a2200109Ia 4500008004100000082002500041100002000066245007200086260001600158300001000174650002000184140113s9999    xx            000 0 und d  a631.589.3:631.811 J2  a"Hewitt, E. J."  aSand and water culture methods used in the study of plant nutrition  b"CAB, 1952"  a241p.  aPlant nutrition