01048nam a2200397Ia 4500008004100000082002800041100001600069245007200085250000900157260002300166490003400189650002400223650001000247650001100257650002000268650002500288650000800313650002300321650001000344650001400354650002900368650002400397650002100421650002200442650002300464650002100487650002000508650000900528650001700537650002400554650001600578650001200594650001700606650001800623650000900641220204s9999    xx            000 0 und d  a631.589.3:581.13bHEW;2  aHEWITT, E J 0aSand and water culture methods used in the study of plant nutrition  aEd.2  aEnglandbCABc1952  aTechnical communication No 22  aAutomatic irrigaton  aBoron  aCopper  aDisease control  aEnvironmental factor  aIon  aIon exchange resin  aLight  aManganese  aMicronutrient deficiency  aNutrient impurities  aNutrient reagent  aNutrient solution  aNutrient treatment  aPlant containers  aPlant nutrition  aSand  aSand culture  aSolid rooting media  aTemperature  aTesting  aTree culture  aWater culture  aZinc