TY  - BOOK
AU  - Kirkby, E.A., ed.
TI  - Nitrogen nutrition of the plant
U1  - 572.5442 21st ed.
PY  - 1970///
CY  - Leeds
PB  - Arthur Wigley and Sons, The Waverley Press
KW  - Nitrogen
KW  - Nitrogen fixation
KW  - Nitrogen fixing trees
ER  -