TY  - BOOK
AU  - Mengel, Konrad.
TI  - Principles of plant nutrition
U1  - 631.811 L8 
PY  - 1978///
CY  - Berne
PB  - International Potash Institute
KW  -  Konrad Mengal and Ernest A.Kirk.
KW  - Kirkby, Ernest A., jt. author
KW  - Plants-nutrition,Growth (Plants)
ER  -