Mengel, Konrad <br/><br/>
Principles of plant nutrition / 
Konrad Mangel, Ernest A.Kickby. 
 - 3rd ed. 
 - Bern:  International Potash Institute,  1982 
 - 655p.:  ill. 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>Plants--Nutrition