TY  - BOOK
AU  - Robinson, J. B. D.
TI  - The soil nitrogen index and its calibration with crop performance to improve fertilizer efficiency on arable soils
T2  - Special publication
PY  - 1975///
CY  - Slough
PB  - Commonwealth Bureau of Soils
KW  - Nitrógeno
KW  - Efecto en plantas
KW  - Suelos
KW  - Nitrógeno en
ER  -